Vacuum generator OVEM. Operating instructions f [ ]

Transcription

1 Vacuum generator OVEM en Operating instructions f [ ]

2 Original instructions OVEM-DE Identification of hazards and instructions on how to prevent them: Warning Hazards that can cause death or serious injuries Other symbols: Note Material damage or loss of function Recommendations, tips, references to other documentation Text designations: Activities that may be carried out in any order 1. Activities that should be carried out in the order stated General lists Result of an action/references to more detailed information 2 Festo OVEM f

3 1 About this document Product description Structure Characteristics Security Use for intended purpose General safety information Range of applications and certifications Function and application Function overview Switching functions Valve control Air-saving function Optimisation of the transport time Monitoring and diagnostics Measured variables Teach function (Teach-In) Installation Mechanical Pneumatic Electric Commissioning Commissioning vacuum suction nozzle Set the intensity of the ejector pulse Operation Setting the ejector pulse duration Configure the switching outputs Display switching output settings Setting the switching characteristics of a switching output Set diagnostic message channel Teaching of switching points Deleting the minimum or maximum pressure value Festo OVEM f English 3

4 7.3 Configuring the evacuation and air supply times Setting the limit values for the evacuation and air supply times Teaching the evacuation and air supply time Displaying the evacuation and air supply times Deleting the evacuation and air supply times Operating manual override Mechanical manual override Electrical manual override Activating security code Switching the air saving function on or off Restore factory settings Error messages and fault clearance Diagnostic levels Error messages and error codes Malfunctions Disassembly Maintenance and care Technical data Appendix Graphic display and LCD displays Operating statuses and menu structure Meaning of symbols for representing the menu structure RUN mode SHOW mode EDIT mode Teach mode Festo OVEM f English

5 1 About this document This document describes the use of the above mentioned product. All available documents for the product 2 Product description 2.1 Structure ab aa 7 aj Ejector pulse solenoid valve (Eject) 2 Vacuum solenoid valve 3 Mechanical manual override of the solenoid valves 4 Supply port (1) 5 Exhaust port / silencer (3) 6 Vacuum connection (2) 7 Housing with mounting holes Fig. 1 Control sections and connections 8 Slide for changing the filter element 9 Filter housing with inspection window aj Flow control screw for adjusting the ejector pulse aa Vacuum sensor with LCD display and operating keys Fig. 13 ab electrical connection Festo OVEM f English 5

6 2.2 Characteristics Characteristic Code Meaning Vacuum generator OVEM Vacuum generator with vacuum solenoid valve ON/OFF and electric manual override Nominal width of laval nozzle mm mm mm mm mm Vacuum type -H high vacuum -L high suction volume Housing size / width -B 20 mm wide, ISO standard -BN 20 mm wide, NPT Pneumatic ports -QS all ports with QS push-in fittings (-B-QS) all ports with QS push-in fittings inch (-BN-QS) -QO Supply / vacuum port with QS push-in fittings, exhaust port with open silencer (-B-QO) Supply / vacuum port with QS push-in fittings inch, exhaust port with open silencer (-BN-QO) -GN all ports with female G thread (-B-GN) all ports with female NPT thread (-BN-GN) -GO Supply / vacuum port with female G threads, exhaust port with open silencer (-B-GO) Supply / vacuum port with female NPT threads, exhaust port with open silencer (-BN-GO) -PL prepared for manifold rail, vacuum and exhaust port with QS push-in fittings (-B-PL) prepared for manifold rail, vacuum and exhaust port with QS push-in fittings inch (-B-PL) -PO prepared for manifold rail, vacuum port with QS push-in fittings, exhaust port with open silencer (-B-PO) prepared for manifold rail, vacuum port with QS push-in fittings inch, exhaust port with open silencer (-BN-PO) Normal position of the vacuum -ON NO, normally open (vacuum generation) generator -OE NO, normally open (vacuum generation) with ejector pulse -CN NC, normally closed (no vacuum generation) -CE NC, normally closed (no vacuum generation) with ejector pulse Electrical connection -N Plug M12 (5-pin) 6 Festo OVEM f English

7 Characteristic Code Meaning Vacuum sensor -1PD 1 switching output PNP, 2 switching input PNP, with display -2P 2 switching outputs PNP -2N 2 switching outputs NPN -PU 1 switching output PNP, 1 analogue output 0 10 V -PI 1 switching output PNP, 1 analogue output 4 20 ma -NU 1 switching output NPN, 1 analogue output 0 10 V -NI 1 switching output NPN, 1 analogue output 4 20 ma Alternative vacuum display - bar (-B), InHg (-BN) -B Bar -W InH2O -H InHg Tab. 1 Overview of variants 3 Security 3.1 Use for intended purpose The vacuum generator type OVEM is designed for generating a vacuum. 3.2 General safety information The product may only be used in its original status without unauthorised modifications. Only use the product if it is in an excellent technical status. Use the product only inside buildings. Take into consideration the ambient conditions at the location of use. The product is intended for use in industrial environments. The product can generate high frequency interference, which may make it necessary to implement interference suppression measures in residential areas. Observe the specifications on the product labelling. Comply with all applicable national and international regulations. Observe the local specifications for environmentally friendly disposal. Festo OVEM f English 7

8 3.3 Range of applications and certifications Note CE declaration of conformity and certificates In connection with the UL marking on the product, the information of this section is also applicable for compliance with the certification conditions of Underwriters Laboratories Inc. (UL) for the U.S.A. and Canada. UL approval information Product category code QUYX (USA) QUYX7 (Canada) File number E Considered standards UL C22.2 No UL mark Tab. 2 UL approval information Unit shall be supplied by a power source which complies with the requirements of a limited-energy circuit in accordance with IEC/EN/UL/CSA or a Limited Power Source (LPS) in accordance with IEC/EN/UL/CSA or IEC/EN/UL/CSA or a Class 2 circuit in accordance with NEC or CEC. 8 Festo OVEM f English

9 4 Function and application 4.1 Function overview The OVEM is a vacuum suction nozzle with digital transmission of setpoint and actual value as well as diagnostics and parameterisation options. Configuration is carried out via the operating keys. The diagnostic messages are shown in the display. Function OVEM-...-2P/2N /PU/PI/NU/NI OVEM-...-1PD Control of the compressed air supply with 2 valve functions x x Chapter 4.3 Air-saving function Chapter 4.4 x x Electrical and mechanical manual override Chapter 7.4 x x Monitoring of the vacuum build-up through integrated pressure x x sensor and advanced monitoring functions Chapter 4.6 Auto-Drop Function: generation of an automatic eject pulse for accelerated vacuum purging and safe set-down Chapter 4.3 x - Generation of an eject pulse via a control signal at the digital switching input (ejection) DI2 - x Tab. 3 Function overview Festo OVEM f English 9

10 4.2 Switching functions The switching outputs can be configured via the switching functions. The switching logic of the switching outputs can be configured as normally open (NO) or normally closed (NC). The switching mode of the switching outputs can be determined as threshold value or window comparator. With active air-saving function, the switching mode is determined as the threshold value comparator by switching output A. Threshold value comparator Normally open (NO) Normally closed (NC) Switching function 1 Switchpoint (SP1) Teach mode 1) : 2 Teach-in points (TP1, TP2) SP1 = ½ (TP1+TP2) OUT 1 0 1) TP1 = minimum pressure value, TP2= maximum pressure value, independent of the Teach sequence Tab. 4 Threshold value comparator: setting of switchpoint SP1 and hysteresis HY HY TP1 SP1 TP2 p OUT 1 0 HY TP1 SP1 TP2 p Window comparator Normally open (NO) Normally closed (NC) Switching function: OUT OUT 2 switchpoints 1 HY HY 1 (SP1, SP2) HY HY Teach mode 1) : 0 p 0 p 2 Teach-in points (TP1, TP2) TP1=SP1 TP2=SP2 TP1=SP2 TP2=SP2 1) TP1 = minimum pressure value, TP2= maximum pressure value, independent of the Teach sequence Tab. 5 Window comparator: setting of switchpoints SP1, SP2 and hysteresis HY 10 Festo OVEM f English

11 Code Switching output A Switching output B Switching inputs -1PD Switching output Positive switching 2 switching inputs positive switching -2P Pressure sensor output A Switching output Positive switching Pressure sensor output B or Diagnostic message channel -PI Analogue output ma Vacuum -PU Analogue output 0 10 V Vacuum -2N Switching output Negative switching Pressure sensor output A -NI -NU Switching output Negative switching Pressure sensor output B or Diagnostic message channel Analogue output ma Vacuum Analogue output 0 10 V Vacuum 1 switching input Positive switching 1 switching input Negative switching Tab. 6 Switching output and switching input variants 4.3 Valve control Control of the ejector pulse Auto-Drop Function (except OVEM-...-1PD) The ejector pulse is generated after the signal change Suction. The duration of the ejector pulse can be set Chapter 7.1. Signal-controlled ejector pulse (only OVEM-...-1PD) The ejector pulse is generated via a control signal at the digital switching input (ejection) DI2. The ejector pulse can also be used to blow dust off the workpiece surface. The duration of the ejector pulse can be set via the duration of the control signal at the digital switching input (ejector) DI2. Festo OVEM f English 11

12 Depending on the input signal, the vacuum solenoid valve or the ejector pulse solenoid valve is controlled. Valve function OVEM-...-CE Valve function OVEM-...-CE-...-1PD Auto-Drop t ej Valve function OVEM-...-OE Valve function OVEM-...-OE-...-1PD Auto-Drop t ej Control signal at the digital switching input (suction) DI1 2 Control signal at the digital switching input (ejection) DI2 (only OVEM-...-1PD) 3 Switching position of vacuum solenoid valve Fig. 2 Valve control switching behaviour 4 Switching position of ejector pulse solenoid valve 5 Vacuum connection (2) t ej Duration of ejector pulse 12 Festo OVEM f English

13 4.4 Air-saving function The air-saving function reduces the air consumption of the vacuum suction nozzle OVEM-...-CE / -OE during the evacuation phase. 50 mbar (fixed) t DI1 DO1 t t 1 Hysteresis (HY) 2 Threshold value Switch off suction = switchpoint (SP1) 3 Threshold value Switch on suction 4 Reset point (RSP1) Fig. 3 Mode of operation of the air-saving function If the pressure value has reached the switchpoint SP1 2, vacuum generation is deactivated. An internal check valve prevents the reduction of the vacuum. Vacuum can still be reduced slowly due to leakage in the overall system (e. g. due to rough workpiece surfaces). To reduce energy consumption, vacuum generation is not switched on until the lower threshold value 3 is fallen below. The air saving function is activated in the factory. If air-permeable workpieces are transported, the vacuum is reduced more quickly which would cause the vacuum generation to switch unnecessarily often. In this case, it makes sense to deactivate the air-saving function Chapter 7.6. Festo OVEM f English 13

14 4.5 Optimisation of the transport time For variants with 2 switching outputs (OVEM-...-2P/-2N/-PU/-PI/-NU/-NI), the transport time can be optimised by using switching output Out B. The vacuum required for the transport is controlled by switching output Out A. To optimise the transport time, the workpiece can e. g. be gripped by the usable vacuum while the vacuum is building up. The minimum usable vacuum required is controlled by switching output Out B. 4.6 Monitoring and diagnostics The vacuum suction nozzle has monitoring functions that permit early detection of malfunctions or errors in ongoing operation. Monitoring of process parameters (pressure value at the vacuum connection, switching points, switching outputs and switching inputs, evacuation time t E, air supply time t B and limit values) Diagnostic messages Chapter 8.1 Error detection Chapter 8.2 The diagnostic messages are shown in the display. For variants with 2 switching outputs (OVEM-...-2P/-2N), switching output Out B can also be set as diagnostic message channel (di 1 or di 2) Chapter The monitoring functions are activated at the factory (except for monitoring of the evacuation and air supply times). The time monitoring can be activated through setting of the limit values for evacuation time and air supply time Chapter Festo OVEM f English

15 4.7 Measured variables Pressure value (vacuum) The pressure value (vacuum) is continuously measured between the vacuum connection and filter. The minimum and maximum measured pressure values are saved. If the operating voltage of the vacuum suction nozzle is switched off, the values are lost. Cycle time A cycle covers the time from the start of evacuation through ejection to the start of the new evacuation. Evacuation time and air supply time The evacuation time t E is measured from the start of evacuation until reaching of the switchpoint SP1 of the switching output. The air supply time t B is measured from the start of air supply to the time at which the pressure value (vacuum) falls below 50 mbar. p Cycle time mbar 0 t E Transport time t B Return time t DI1 DO1 Vacuum valve Ejector pulse valve 1 Switching point SP1 2 Reset point RSP1 Fig. 4 Clock cycle example for Out A (Air-save) t E t B Evacuation time Air supply time The shown sequence of the switching statuses and control signals applies to all product variants except OVEM-...-1PD. Sequence for OVEM-...-1PD Fig. 2 Festo OVEM f English 15

16 4.8 Teach function (Teach-In) The Teach function permits configuring the switchpoints and time monitoring during run time. Static Teach-In Depending on the Teach command, one switchpoint (SP) or 2 switchpoints (SP1, SP2) are determined from 2 teach-in points. The switchpoints are determined statically, that is, the measurement value remains constant during the entire Teach-In procedure. During execution of the Teach-In procedure, the air save function is deactivated for the duration of the procedure. Dynamic Teach-In Setpoint values are calculated within the Teach-In procedure from a time period. The procedure is used for determination of evacuation and air supply times Fig. 5. After the start of the Teach-In, the time t E and t B is measured at each cycle. With multiple cycle times, the times are averaged. After the stop of the Teach-In, a function reserve of 100 % is added to the averaged values. p SP1 50 mbar Teach Start t E1 1 tb1 2 t E2 t B2 Teach Stop t Vacuum valve t 1 Transport time 2 Return time Fig. 5 3 Cycle time 1 4 Cycle time 2 5 Cycle time N Mode of operation: dynamic Teach-In - Example OVEM-...-CE 16 Festo OVEM f English

17 5 Installation 5.1 Mechanical Note An unfavourable mounting position can impair the function of the product. Install the vacuum suction nozzle so that no condensation from the compressed air lines can gather in the device. Install the vacuum suction nozzle so that it cannot be heated above the maximum permissible operating temperature (plan for convection possibilities). Install the vacuum suction nozzle so that the exhaust can flow without hindrance. Direct mounting M5 / M4 Tab. 7 Max. 2.5 Nm M3 Max. 0.8 Nm Fig. 6 Direct mounting on the side Fig. 7 Direct mounting on the back OVEM OVEM / -07/ -10 OVEM / -20 Mounting screws M5 M4 Tab. 7 Size of the mounting screws with direct mounting on the side Festo OVEM f English 17

18 Mounting on H-rail H-rail mounting accessory 1 M3 Max. 0.8 Nm Mount H-rail mounting. Hang OVEM with H-rail mounting in the H-rail and press in the direction of the arrow. Secure with screw 1 to the H-rail. Fig. 8 H-rail mounting Mounting via mounting bracket Accessories for mounting bracket M5 / M4 Tab. 7 Max. 2.5 Nm Fig. 9 Mounting with mounting bracket Mounting on supply manifold Mounting is possible on a supply manifold with a maximum of 8 places (assembly instructions OABM-P 18 Festo OVEM f English

19 5.2 Pneumatic OVEM-... Circuit symbol OVEM-... Circuit symbol OVEM-...-QO-CN OVEM-...-GO-CN OVEM-...-QO-CE OVEM-...-GO-CE OVEM-...-QS-CN OVEM-...-GN-CN OVEM-...-QS-CE OVEM-...-GN-CE OVEM-...-QO-ON OVEM-...-GO-ON OVEM-...-QO-OE OVEM-...-GO-OE OVEM-...-QS-ON OVEM-...-GN-ON OVEM-...-QS-OE OVEM-...-GN-OE Tab. 8 Circuit symbols, pneumatic OVEM GN GO GN GO GN GO GN GO GN GO Tubing length [m] < 0.5 < 2 < 0.5 < 2 < 0.5 < 2 < 0.5 < 2 < 0.5 < 2 Min. internal diameter of tubing Supply port [mm] Vacuum port [mm] Exhaust port [mm] Tab. 9 Minimum inside diameter of the connection tubes for connections with G-female thread Festo OVEM f English 19

20 Notes on the pneumatic connection Maximum admissible hose length 2 m OVEM-...-GN/GO: Pay attention to the minimum inside diameter of the connection tubes Tab. 9. Do not seal exhaust port. OVEM /-10/-14/-20: If necessary, lengthen silencers with a silencer extension (accessories Recommendation: Use tubes of type PUN Electric Warning Electric voltage Injury caused by electric shock, damage to machine and to system For the electrical power supply, use only PELV circuits in accordance with IEC /EN Use only voltage sources that ensure a reliable electric separation from the mains network in accordance with IEC /EN Observe the requirements of IEC /EN for PELV circuits. Connect the vacuum suction nozzle to the electrical connection. 5-pin plug, M12x1 Maximum tightening torque plug connector M12: 0.5 Nm Maximum permissible cable length: 20 m 20 Festo OVEM f English

21 Plug connector Pin Wire colour 1) Function M 12x1 1 1 Brown (BN) L V White (WH) DO2 digital output Out B 3 Blue (BU) L 0 V 4 black (BK) DO1 digital output Out A/Out A (Air-save) 5 Grey (GY) DI1 digital switching input (suction) 2) 1) If the connection line from the accessories is used 2) At the falling edge of the Suction control signal, the workpiece is set down. Tab. 10 Pin assignment OVEM-...-2P/-2N Plug connector Pin Wire colour 1) Function M 12x1 1 1 Brown (BN) L V White (WH) AO1 Analog output Out B 3 Blue (BU) L 0 V 4 black (BK) DO1 digital output Out A/Out A (Air-save) 5 Grey (GY) DI1 digital switching input (suction) 2) 1) If the connection line from the accessories is used 2) At the falling edge of the Suction control signal, the workpiece is set down. Tab. 11 Pin assignment OVEM-...-PU/-PI/-NU/-NI Plug connector Pin Wire colour 1) Function M 12x1 1 1 Brown (BN) L V White (WH) DO1 digital output Out A/Out A (Air-save) (PNP) 3 Blue (BU) L 0 V 4 black (BK) DI2 digital switching input (ejection) (PNP) 5 Grey (GY) DI1 digital switching input (suction) (PNP) 1) If the connection line from the accessories is used Tab. 12 Pin assignment OVEM-...-1PD Festo OVEM f English 21

22 Circuit diagrams OVEM-...-2P OVEM-...-2N OVEM-...-PU OVEM-...-NU OVEM-...-PI OVEM-...-NI OVEM-...-1PD Tab. 13 Circuit diagrams for vacuum suction nozzle 22 Festo OVEM f English

23 6 Commissioning Note Commissioning should only be carried out by qualified personnel. 6.1 Commissioning vacuum suction nozzle At initial commissioning, the vacuum suction nozzle is placed in operation with the factory settings Tab. 14. Requirements Vacuum suction nozzle is fully mounted and connected Chapter 5. Check operating conditions Check the operating conditions and limit values Technical data. Place vacuum suction nozzle OVEM-...-OE in operation 1. Apply operating pressure to compressed air supply port (1). Low pressure is generated at the vacuum connection (2). 2. Switch on the operating voltage. The current pressure value is displayed. The vacuum suction nozzle is ready for operation. Place vacuum suction nozzle OVEM-...-CE in operation 1. Apply operating pressure to compressed air supply port (1). 2. Switch on the operating voltage. 3. Activate suction: apply input signal to pin 5. Low pressure is generated at the vacuum connection (2). The current pressure value is displayed. The vacuum suction nozzle is ready for operation. Changing of the operating pressure changes the strength of the low pressure at the vacuum connection. As a result, the vacuum can be set at the suction gripper. Functions and parameters can be determined: manually at the device Chapter by Teach-In Chapter Festo OVEM f English 23

24 6.2 Set the intensity of the ejector pulse Requirements Vacuum suction nozzle is in operation. Fig. 10 Screw in flow control screw 1. Completely screw in the flow control screw. The channel for the ejector pulse is closed. No ejector pulse is generated. 2. Switch on vacuum generation. Low pressure is generated at the vacuum connection (2). 3. Switch off vacuum generation. 4. Unscrew flow control screw slightly. An automatic ejector pulse is generated. If no automatic ejector pulse is generated, operate the mechanical manual override of the ejector pulse solenoid valve. 5. Screw out or in the flow control screw until the required intensity of the ejector pulse is set. Setting the ejector pulse duration Chapter Festo OVEM f English

25 7 Operation Additional information on operating statuses and menu structure Chapter Setting the ejector pulse duration Prerequisites RUN mode is active. Security code is not active. 1. Press the EDIT button. [A] flashes. EDIT mode is active. 2. Press B-key. [B] + segment L18 flash. 3. Press EDIT button. [msec], [_ ] and [ _] flash. 4. Set time (in ms) via the A button and the B button. To deactivate the ejector pulse, set to OFF. 5. Keep EDIT button pressed for 3 seconds. RUN mode is active. Note When large suction grippers are used, a vacuum independent of the device can be built up for physical reasons. This might mean that the workpiece does not detach from the suction gripper, even if the ejector pulse is set to a sufficiently long duration. Festo OVEM f English 25

26 7.2 Configure the switching outputs Display switching output settings The process for displaying the settings of the switching outputs Out A (A-button) and Out B (B-button) is fundamentally the same. In addition, the configuration of the switching output and the duration of the ejector pulse is displayed for switching output Out B. In the following, the process is described using the switching output Out A. Prerequisite: RUN mode is active. 1. Press the A key. SHOW mode is active. If there are errors, the error numbers are indicated. 2. Press the A key. The following settings will be displayed: switching function (threshold value or window comparator) Switching points [SP] or [SP] [min]. switching characteristic [NO/NC] 3. Press the A key. Only with Window comparator switching function: switching point [SP], [max] is displayed. Press A-key. Hysteresis [HY] is displayed. 4. Press the A key. Minimum pressure value is displayed. 5. Press the A key. Maximum pressure value is displayed. 6. Press the A key. RUN mode is active Setting the switching characteristics of a switching output The process for setting the switch outputs Out A (A-button) and Out B (B-button) is fundamentally the same. Additionally, the switching output IN A1 must be selected for Out B, since Out B can also be configured as a diagnostic message output. Chapter In the following, the process is described using the switching output Out B. Prerequisites: RUN mode is active. Switching output Out B is defined as switching output In A1. Security code is not active. 26 Festo OVEM f English

27 1. Press EDIT button. [A] flashes. EDIT mode is active. 2. Press B-key. [B] flashes. 3. Press EDIT button. Display <InA1> 4. Press EDIT button. The currently set switching function flashes (threshold value or window comparator). 5. Set switching function using the A or B key. 6. Press EDIT button. [SP] flashes (threshold value comparator) or [SP], [min] flashes (window comparator). 7. Set switching point (SP or SPmin) using the A key or B key. 8. Press EDIT button. Only with switching function window comparator: [SP], [max] flashes. Set switching point (SPmax) using the A key or B key. Press EDIT button. [HY] flashes. 9. Set hysteresis [HY] using the A key or B key. 10.Press EDIT button. [NO] or [NC] flashes. 11.Set the switching characteristic [NO/NC] using the A key or B key. 12.Press EDIT button. RUN mode is active Set diagnostic message channel If the switching output Out B is set as diagnostic message channel (dl 1 or dl 2), the switching output Out B can no longer be used as switching output In A1. Prerequisites: RUN mode is active. Security code is not active. 1. Press EDIT button. [A] flashes. EDIT mode is active. 2. Press B-key. [B] flashes. 3. Press EDIT button. If Out B is defined as switching output, <InA1> is displayed. 4. Set the diagnostic message channel (di 1 or di 2) using the A key or B key. 5. Press EDIT button. [NO] or [NC] flashes. 6. Set the switching characteristic [NO/NC] using the A key or B key. Festo OVEM f English 27

28 7. Press EDIT button. RUN mode is active Teaching of switching points During teaching, the air saving function is automatically deactivated. If the pressure differential between the teach points is two little, teaching does not work. The process is the same for teaching the switching outputs Out A (A button) and Out B (B button). In the following, the process is described using the switching output Out A. Prerequisites: RUN mode is active. Switching function is set. Security code is not active. 1. Set the vacuum for the first teach point. Object gripped or object not gripped the sequence is freely selectable. 2. Press the A key and the EDIT button simultaneously. Teach mode is active. Air saving function is deactivated. The measured value is taken over as the first teach point (TP1). [A] and [TeachIn] flash. 3. Set the vacuum for the second teach point (TP2). 4. Press the A key and the EDIT button simultaneously. The measured value is taken over as the second teach point (TP2). Switching points (SP or SPmin and SPmax) become applicable. The air saving function is activated. RUN mode is active. Note The hysteresis is adjusted to the taught values. Setting the hysteresis ( Chapter 7.3). Recommendation: check the taught values in a test run Deleting the minimum or maximum pressure value Prerequisite: RUN mode is active. 1. Press the A key. SHOW mode is active. If there are errors, the error numbers are indicated. 2. Repeatedly press the A key until the minimum pressure value is displayed. 3. To see the following value, press the A key. 28 Festo OVEM f English

29 To delete the minimum pressure value, press the EDIT button. The minimum pressure value is deleted. 4. Press the A key. Maximum pressure value is displayed. 5. To return to RUN mode, press the A key. To delete the maximum pressure value, press theedit button. The maximum pressure value is deleted. 6. Press the A key. RUN mode is active. 7.3 Configuring the evacuation and air supply times Setting the limit values for the evacuation and air supply times Prerequisites: EDIT mode is active, [Out A] flashes. Security code is not active. 1. Press the A key. Display <SPEC> 2. Press EDIT button. [Option] flashes. 3. Press EDIT button. [Lock] flashes. 4. Press EDIT button. [msec], [SP], [max] and [_ ] flash. 5. Set the maximum evacuation time using the A key and B key. [OFF]: monitoring of the evacuation time is not active. 6. Press EDIT button. [msec], [SP], [max] and [ _] flash. 7. Set the maximum air supply time using the A key and B key. [OFF]: monitoring of the air supply time is not active. 8. Press EDIT button. RUN mode is active Teaching the evacuation and air supply time Prerequisites: RUN mode is active. Security code is not active. Switching function is set. 1. Press the A key, B key and the EDIT button simultaneously. TEACH mode is active. [TeachIn] and the diagnostics segments flash. 2. Measure at least one clock cycle. Festo OVEM f English 29

30 The mean value of the measured cycles is calculated. The more cycles are run, the better is the value. The taught values are applied with a function reserve of 100 %. 3. Press A key, B key and EDIT button. RUN mode is active. If the switching points or the intensity of the ejector pulse are changed, teach the evacuation and air supply times again. Recommendation: check the taught values in a test run Displaying the evacuation and air supply times Prerequisite: RUN mode is active. 1. Press the A key and B key simultaneously. SHOW mode is active. evacuation time limit value is displayed. 2. Press the A key and B key simultaneously. air supply time limit value is displayed. 3. Press the A key and B key simultaneously. The minimum evacuation time is displayed. 4. Press the A key and B key simultaneously. The maximum evacuation time is displayed. 5. Press the A key and B key simultaneously. The minimum air supply time is displayed. 6. Press the A key and B key simultaneously. The maximum air supply time is displayed. 7. Press the A key and B key simultaneously. RUN mode is active Deleting the evacuation and air supply times Prerequisites: SHOW mode is active. The minimum evacuation time is displayed. 1. To see the following value, press the A key and B key simultaneously. To delete the displayed value, press the EDIT button. 2. Press the A key and B key simultaneously. RUN mode is active. 30 Festo OVEM f English

31 7.4 Operating manual override Both solenoid valves can be manually switched with the manual override Mechanical manual override 1. Press in the stem of the manual override with a blunt pin. The solenoid valve switches. 2. Remove the pin. The stem of the manual override automatically returns. The solenoid valve reverts to the basic position. Fig. 11 Mechanical manual override Electrical manual override Prerequisites: RUN mode is active. Security code is not active. 1. Press EDIT button. [A] flashes. EDIT mode is active. 2. Press B-key. [B] flashes + segment L18 is illuminated. 3. Press EDIT button. [msec], [_ ] and [ _] flash. The duration of the ejector pulse is displayed. 4. Press EDIT button. Display <FORC>. The electrical manual override is active. 5. Switching the solenoid valves. Vacuum solenoid valve: press A key. Ejector pulse solenoid valve: Press B key. 6. To exit the submenu, press the EDIT button. RUN mode is active. Festo OVEM f English 31

32 7.5 Activating security code A security code can be established and activated to prevent changes by unauthorised persons. Factory setting: OFF The security code is reset when factory settings are restored. Prerequisites: RUN mode is active. Security code is not active. 1. Press EDIT button. [A] flashes. EDIT mode is active. 2. Press the A key. Display <SPEC> 3. Press EDIT button. [Option] flashes. 4. Press EDIT button. [Lock] flashes. 5. Set the security code using the A key and B key. [OFF]: security code is not active. 6. Keep EDIT button pressed for 3 seconds. RUN mode is active. 7.6 Switching the air saving function on or off Prerequisites: EDIT mode is active, [Out A] flashes. Security code is not active. 1. Press the A key. Display <SPEC> 2. Press EDIT button. [Option] flashes. 3. Switch the air saving function on or off using the A key or B key. [ON]: Air saving function active. [OFF]: Air-saving function not active. 4. Keep EDIT button pressed for 3 seconds. RUN mode is active. 32 Festo OVEM f English

33 7.7 Restore factory settings Through resetting of the factory settings, the parameters, configuration and security code are reset to the condition at shipment Tab. 14. The current settings are lost. 1. Switch off the operating voltage. 2. Simultaneously press and hold down A key + B key + EDIT button. 3. Switch on the operating voltage. Display <CLEA> 4. Release the A key + B key + EDIT button. The factory settings are restored. Factory settings Parameter OVEM-...-H OVEM-...-L Switching mode of the electrical output Threshold value comparator Switching logic of the electrical output NO (Normally Open) Air-saving function Active Security code Off Out A (Air-save) SP1 [bar] Hysteresis [bar] 0.25 Out A SP1 [bar] SP2 [bar] Hysteresis [bar] Out B 1) SP1 [bar] SP2 [bar] Hysteresis [bar] Duration of ejector pulse 1) [ms] 200 1) Parameters not available for OVEM-...-1PD Tab. 14 Factory settings Festo OVEM f English 33

34 8 Error messages and fault clearance The diagnostic messages are shown as error code on the display. For variants with 2 switching outputs (OVEM-...-2P/-2N), one of the two logic channels of switching output Out B can in addition be set as a diagnostic message channel Chapter The diagnostic message channel can be configured as normally open (NO) or normally closed (NC). 8.1 Diagnostic levels There are 4 diagnostic levels. The red background illumination of the display lights up for messages of the diagnostic levels 1 to 3. Diagnostic level Diagnostic message channel Description 0 No message Device is OK. 1 logical channel di 1 is active 2 logical channel di 1 or di 2 is active 3 logical channel di 1 or di 2 is active no restriction in function yet but operating parameters are worsening Function still ensured, but with restrictions (e.g. higher power consumption). Emergency operation, maintenance urgently required. Function is no longer assured. All controllable outputs of the device are inactive. Tab. 15 Diagnostic levels for switching output Out B and display If the evacuation and air supply time is to be monitored, set the limit values for the evacuation and air supply time Chap Festo OVEM f English

35 8.2 Error messages and error codes Display Diagnostic level Description Remedy Er01 3 Hardware errors in the device Replace device. Er17 3 Supply voltage is too high or too low Check the power supply. (error) Er20 2 permissible device temperature exceeded Keep device away from heat sources. Er21 2 Short-circuit Out A Check output for overload. Check installation. Er32 2 OVEM-...-1PD: Vacuum solenoid valve does not switch or does not switch correctly Er33 2 except OVEM-...-1PD: Solenoid valve does not switch or does not switch correctly. Plunger does not move, current through solenoid coil is too low, short circuit in solenoid coil OVEM-...-1PD: Ejector pulse solenoid valve does not switch or does not switch correctly Er34 1 Evacuation time exceeded in 2 of 5 cycles Er35 2 Evacuation time exceeded by a factor of two in 2 of 5 cycles Er36 1 Air supply time exceeded in 2 of 5 cycles Er37 2 Air supply time exceeded by a factor of two in 2 of 5 cycles Er38 2 Switching frequency of the air saving function > 1 Hz (warning) Press mechanical manual override several times. Check the power supply. Replace device. Press mechanical manual override several times. Check the power supply. Replace device. Check for leakage. Check for leakage. Extend air supply time. Check throttle setting. Check for leakage. Er39 2 SP1 for Out A not reached after 10 s Check for leakage. Check compressed air supply. Switch-back threshold fallen below (active air saving function and threshold value comparator) upper trigger level exceeded or lower trigger level fallen below (window comparator) Check trigger levels. Check settings for Out A. Check compressed air supply. Festo OVEM f English 35

36 Display Diagnostic level Description Remedy Er40 2 Supply voltage too high (warning) Check the power supply. Er41 2 Supply voltage too low (warning) Tab. 16 Error messages, error codes, diagnostic levels and error description 36 Festo OVEM f English

37 8.3 Malfunctions Malfunction Possible cause Remedy Workpiece does not detach from the suction gripper Switching output does not react in accordance with the settings device-independent vacuum between workpiece and suction gripper, ejector pulse not activated or sufficiently dimensioned Activate ejector pulse when lifting the suction gripper. Increase the duration and intensity of the ejector pulse. Tubing dimensioned incorrectly Replace tubing (tubing dimensions Chap. 5.2). Flow control screw closed Open the flow control screw. Short circuit or overload at the Eliminate short circuit or output overload. Device defective Replace device. No display Operating voltage faulty Apply permissible operating voltage Chap electrical connections swapped Connect device correctly Chap Device defective Replace device. Incomplete display Display defective Replace device. Pressure indicator incorrect pneumatic connections swapped Connect device correctly Chap Settings cannot be edited, [Lock] is displayed [min] + [max] flashing at the same time Display + [min] + [max] flash simultaneously Display flashes and error code appears [Option] flashes Security code active Enter security code Chap Diagnostic level 1 active Chap. 8.1 Diagnostic level 2 active Chap. 8.1 Diagnostic level 3 active Chap. 8.1 Air-save function deactivated because outside the limit value Check for leakage. Tab. 17 Malfunctions Festo OVEM f English 37

38 9 Disassembly 1. Switch off energy sources: operating voltage compressed air 2. Disconnect pneumatic and electrical connections from the device. 3. Loosen mountings and remove device. 10 Maintenance and care Clean device 1. Switch off energy sources: operating voltage compressed air 2. Clean device with non-abrasive cleaning agents. 3. Check air filter through the inspection window for dirt. Replace air filter 2 1 Fig. 12 Remove / install air filter 1. Vent the vacuum suction nozzle. 2. Carefully pull out the slide 1 up to the first detent. The slide must stay in this position on the filter. 3. Pull out filter 2. Clean, if necessary. 4. Push filter into the housing. 5. Push in slide. The filter is pushed by the slide into the vacuum suction nozzle. 38 Festo OVEM f English

39 11 Technical data OVEM / / -20 General Approval c UL us listed (OL) RCM CE mark In accordance with EU EMC Directive ( declaration of conformity) Characteristic values Operating pressure OVEM-...-QS / -GN / -PL [bar] 2 6 Operating pressure OVEM-...-QO / -GO / -PO [bar] 2 8 Pressure measuring range [bar] 1 0 Overload pressure at vacuum port [bar] 5 Ready-state delay [ms] 500 Dead time (evacuation and ejection) [ms] Electronics Nominal operating voltage [V DC] 24 ± 15 % Max. output current (per switching output) [ma] 100 Voltage drop (for all switching outputs) [V] 1.5 Idle current [ma] 70 Coil characteristics, 24 V DC - low current phase [W] 0.3 Coil characteristics, 24 V DC - high current phase [W] 2.55 Time until current reduction [ms] 80 Capacitive load maximum DC [nf] 100 Overload protection Provided Inductive protective circuit Adapted to MZ, MY, ME coils Insulation voltage [V] 50 Surge resistance [kv] 0.8 Max. current consumption OVEM-...-2P/-2N [ma] 270 OVEM-...-PI/-PU/-NI/-NU [ma] 180 OVEM-...-1PD [ma] 170 Accuracy [% FS] ± 3 Hysteresis [% FS] ± 0.1 Short-circuit resistance Provided Protection against polarity reversal For all electrical connections Display/operation Threshold value setting range [bar] Hysteresis setting range [bar] Setting range duration, ejector pulse [ms] Festo OVEM f English 39

40 OVEM / / -20 Environment Ambient temperature [ C] 0 50 Temperature of medium [ C] 0 50 Degree of contamination 3 Operating medium Compressed air to ISO :2010 [7:4:4] Note on the operating medium Lubricated operation not possible Note on materials RoHS-compliant Resistance to shock (in accordance with IEC /EN60068) Vibration resistance (in accordance with EN ) Protection class 30 g acceleration with 11 ms duration (half-sine) Hz: 0.35 mm / Hz: 5 g III Degree of protection 1) IP 65 Relative air humidity [%] 5 85 Interference emission In accordance with EN Interference immunity to EN Maximum permissible signal line length [m] 20 Materials Information on materials - seals NBR Information on materials - housing Die-cast aluminium, PA reinforced Information on materials - plug housing housing Nickel-plated brass 1) Degree of protection not evaluated by UL Tab. 18 Technical data 40 Festo OVEM f English

41 12 Appendix 12.1 Graphic display and LCD displays aj Display segment switching output Out A 2 Display segment of switching output Out B (except OVEM-...-1PD) 3 Display segment of switching input In A1 (except OVEM-...-1PD) 4 4-digit alphanumeric display 5 Toolbar for functions Tab Segment bar to the right: graphic display of the current status of the digital inputs or valve status Tab B-key 8 A-key 9 EDIT button aj Segment bar to the left: graphic display of the current pressure value related to the maximum measured value of the measuring range Fig. 13 LCD display and operating keys Festo OVEM f English 41

42 Symbol [SP] [SP] + [min] [SP] + [max] [HY] [NO] / [NC] [TeachIn] [Option] [Lock] L1 L3 L2 L10 L12 Description Threshold value comparator selected Switching point Window comparator selected Lower switching point Upper switching point Hysteresis Switching logic normally open (Normally open) / normally closed (Normally closed) Teach function (Teach-In) active Air-saving function active Security code active Segments display the following: current status of the digital inputs current valve status Tab. 20 and Tab. 21 L16 L18 Tab. 19 Symbolism in display 42 Festo OVEM f English

43 Advertisement Segment L10 is illuminated Description Vacuum solenoid valve is switched. Segment L14 is illuminated Ejector pulse solenoid valve is switched. Segment L17 + [A] are illuminated and [min] flashes Segment L17 + [A] are illuminated and [max] flashes Segment L18 + [B] illuminated and [msec] + [_ _] flash Minimum pressure value display Maximum pressure value display Duration of ejector pulse Segments L1, L3, L4, L5 illuminated and [msec] + [_ ] + [min] flash [msec] + [_ ] + [max] flash [msec] + [ _] + [min] flash [msec] + [ _] + [max] flash [msec] + [_ ] + [SP] + [max] flash [msec] + [ _] + [SP] + [max] flash Segments L1, L2, L5, L6 are illuminated and display <ON> + [Option] flashes Segments L1, L2, L5, L6 illuminated and [Lock] flashing Segment L10 + [B] are illuminated + display <FORC> Diagnostics of evacuation and air supply times Display of minimum evacuation time Display of minimum evacuation time Display of minimum air supply time Display of maximum air supply time Display/Setting of evacuation time limit value Display/setting the air supply time limit value Setting of air-saving function (EDIT mode) <ON>: Air-saving function active <OFF>: Air-saving function not active Setting the security code (1 9999) <OFF>: security code is not active additional function of the electrical manual override via operating buttons Vacuum solenoid valve switched Segment L14 + [B] are illuminated + display <FORC> additional function of the electrical manual override via operating buttons Ejector pulse solenoid valve (Eject) switched Tab. 20 OVEM-...-2P/-2N/-PU/-PI/-NU/-NI: additional displays of segment bars Examples Festo OVEM f English 43

44 Advertisement Segment L10 is illuminated Description Vacuum solenoid valve is switched. Segment L12 is illuminated Ejector pulse solenoid valve is switched. Segment L16 is illuminated digital switching input DI 1 (suction) is set. Segment L18 is illuminated digital switching input DI2 (ejection) is set. Segment L17 + [A] are illuminated and [min] flashes Segment L17 + [A] are illuminated and [max] flashes Segments L1, L3, L4, L5 illuminated and [msec] + [_ ] + [min] flash [msec] + [_ ] + [max] flash [msec] + [ _] + [min] flash [msec] + [ _] + [max] flash [msec] + [_ ] + [SP] + [max] flash [msec] + [ _] + [SP] + [max] flash Segments L1, L2, L5, L6 are illuminated and display <ON> + [Option] flashes Segments L1, L2, L5, L6 illuminated and [Lock] flashing Segment L10 + [B] are illuminated + display <FORC> Minimum pressure value display Maximum pressure value display Diagnostics of evacuation and air supply times Display of minimum evacuation time Display of minimum evacuation time Display of minimum air supply time Display of maximum air supply time Display/Setting of evacuation time limit value Display/setting the air supply time limit value Setting of air-saving function (EDIT mode) <ON>: Air-saving function active <OFF>: Air-saving function not active Setting the security code (1 9999) <OFF>: security code is not active additional function of the electrical manual override via operating buttons Vacuum solenoid valve switched Segment L12 + [B] are illuminated + display <FORC> additional function of the electrical manual override via operating buttons Ejector pulse solenoid valve (Eject) switched Tab. 21 OVEM-...-1PD: additional displays of segment bars Examples 44 Festo OVEM f English

45 12.2 Operating statuses and menu structure Meaning of symbols for representing the menu structure Symbol Significance automatic return to the RUN mode when the monitoring time has expired (here 80 seconds) Press EDITbutton for 3 seconds: manual return to the RUN mode Symbol on the display flashes (here display segment switching output Out A) / Input blocked / not blocked press individual key (here A key) Press A-key or B-key, set value Press keys simultaneously (here: B key and EDIT button) Press EDIT button Branch Error display Reset values Cycle Vacuum solenoid valve switched Ejector pulse solenoid valve switched Teach point is taken over Special menu (SPEC) is active (Setting of the air saving function, security code, max. evacuation and max. air supply time) Tab. 22 Meaning of symbols for representing the menu structure RUN mode Basic status after the operating voltage is switched on Display of the current measured value (relative pressure) Display of the signal statuses of the solenoid valves Display of the selected inputs and outputs Festo OVEM f English 45

46 SHOW mode Display of the current settings Display and deletion of the minimum and maximum pressure values Display and deletion of the minimum and maximum evacuation and air supply time Display of diagnostic messages 1 1 Submenu only available for OVEM-...-2P/-2N/-PU/-PI/-NU/-NI Fig. 14 Menu structure SHOW mode 46 Festo OVEM f English

47 EDIT mode Setting of parameters Operation of the electrical manual override (FORC) Submenu only available for OVEM-...-CE / -OE Fig. 15 Menu structure EDIT mode Festo OVEM f English 47

48 Teach mode Acceptance of the current measured value to determine switchpoints 1 1 Submenu only available for OVEM-...-2P/-2N Fig. 16 Menu structure for Teach mode 48 Festo OVEM f English

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