Festo OVEM Series User manual

8140363
OVEM-...-LK
Vacuum generator
8140363
2020-07e
[8140365]
Operating instructions

Translation of the original instructions
2 Festo — OVEM-...-LK — 2020-07e

3Festo — OVEM-...-LK — 2020-07e
1 About this document................................................................................................... 5
1.1 Applicable documents.................................................................................................. 5
2 Safety........................................................................................................................... 5
2.1 Safety instructions........................................................................................................ 5
2.2 Intended use................................................................................................................ 5
2.3 UL certification............................................................................................................. 5
3 Further information..................................................................................................... 6
4 Service..........................................................................................................................6
5 Product overview......................................................................................................... 6
5.1 Product design............................................................................................................. 7
5.1.1 Product variants......................................................................................................7
5.1.2 Display components............................................................................................... 9
5.2 Function....................................................................................................................... 11
5.2.1 Switching functions................................................................................................ 12
5.2.2 Valve control...........................................................................................................12
5.2.3 Air saving function.................................................................................................. 14
5.2.4 Monitoring and diagnostics.................................................................................... 15
5.2.5 Measured variables................................................................................................ 16
5.2.6 Teach function........................................................................................................ 17
5.2.7 Data storage........................................................................................................... 18
5.2.8 Block parameterisation...........................................................................................18
5.2.9 Operating statuses and menu structure..................................................................19
6 Assembly..................................................................................................................... 22
7 Installation.................................................................................................................. 25
7.1 Pneumatic installation.................................................................................................. 25
7.2 Electrical installation.................................................................................................... 26
8 Commissioning............................................................................................................ 27
8.1 Commissioning the vacuum generator......................................................................... 27
8.2 Setting the intensity of the ejector pulse...................................................................... 28
9 Operation and use....................................................................................................... 28
9.1 Mechanical manual override......................................................................................... 28
9.2 Electrical manual override............................................................................................ 29
9.3 Activating the security code.......................................................................................... 29
9.4 Restoring factory settings............................................................................................. 29
10 Maintenance and care................................................................................................. 30
11 Fault clearance............................................................................................................ 31
11.1 Status messages.......................................................................................................... 31
11.2 Diagnostic levels.......................................................................................................... 31
11.3 Error messages and error codes................................................................................... 32
11.4 Malfunctions................................................................................................................. 33
Table of contents

12 Disassembly.................................................................................................................34
13 Disposal........................................................................................................................35
14 Technical data.............................................................................................................. 35
14.1 Technical data for parameterisation interface............................................................... 37
14.1.1 General information, IO-Link.................................................................................. 38
14.1.2 Identification of parameters................................................................................... 38
14.1.3 Process data.......................................................................................................... 39
14.1.4 Smart Sensor profile parameters........................................................................... 40
14.1.5 Device parameters................................................................................................. 44
14.1.6 Observation parameters........................................................................................ 45
14.1.7 Diagnostics............................................................................................................ 47
14.1.8 Device commands.................................................................................................. 48
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1 About this document
1.1 Applicable documents
All available documents for the product èwww.festo.com/sp.
Document Product Contents
Instruction manual Manifold rail OABM-P Assembly
Tab. 1 Applicable documents
2 Safety
2.1 Safety instructions
– The product may only be used in its original status without unauthorised modifications.
– Only use the product if it is in perfect technical condition.
– 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. This product can generate high fre-
quency malfunctions, which may make it necessary to implement interference suppression meas-
ures in residential areas.
– Observe the specifications on the product labelling.
– Comply with all applicable national and international regulations.
– Observe the local regulations for environmentally friendly disposal.
2.2 Intended use
The intended use of the product is to generate a vacuum.
2.3 UL certification
In combination with the UL inspection mark on the product, the information in this section must also
be observed in order to comply with the certification conditions of Underwriters Laboratories Inc. (UL)
for USA and Canada.
UL approval information
Product category code QUYX (USA)
QUYX7 (Canada)
File number E322346
Standards taken into account UL 61010-1
C22.2 No. 61010-1
UL symbol
About this document

The unit shall be supplied by a power source which fulfils the requirements on a limited-energy circuit
in accordance to IEC/EN/UL/CSA 61010-1 or on a Limited Power Source (LPS) in accordance to
IEC/EN/UL/CSA 60950-1 or IEC/EN/UL/CSA 62368-1 or a Class 2 circuit in accordance to NEC or CEC.
3 Further information
– Accessories èwww.festo.com/catalogue.
– Spare parts èwww.festo.com/spareparts.
4 Service
Contact your regional Festo contact person if you have technical questions èwww.festo.com.
5 Product overview
Further information
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5.1 Product design
1Solenoid valve for ejector pulse (Eject)
2Solenoid valve for vacuum
3Mechanical manual override of the solenoid
valves
4Supply port (1)
5Exhaust port/silencer (3)
6Vacuum port (6)
7Housing with mounting holes
8Gate valve for changing the filter
9Filter housing with inspection window
10 Flow control screw for regulation of the
ejector pulse
11 Vacuum sensor with LCD display and operat-
ing buttons
12 Electrical connection
13 Size OVEM-...-C
Fig. 1 Operating elements and connections
Filter housing with inspection window only with OVEM-...-B
5.1.1 Product variants
Product variant Code Meaning
Vacuum generator OVEM Vacuum generator with solenoid valve ON/OFF and electric
manual override
Product overview
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Product variant Code Meaning
-05 0.45mm
-07 0.7mm
-10 0.95mm
-14 1.4mm
-20 2.0mm
Nominal width of Laval nozzle
-30 3.0mm
-H high negative pressureVacuum type
-L high suction volume
-B 20 mm wide, ISO standardHousing size/width
-C 36 mm wide, ISO standard
-QS all ports with QS push-in fittings
-QO Supply/vacuum port with QS push-in fittings, exhaust port
with open silencer
-GN all ports with G female thread
-GO Supply/vacuum port with NPT female thread, exhaust port
with open silencer
-PL prepared for common supply manifold, vacuum and exhaust
port with QS push-in fittings (-B-PL/-C-PL)
Pneumatic ports
-PO prepared for common supply manifold, vacuum port with QS
push-in fittings, exhaust port with open silencer (-B-PO/-C-
PO)
-OE N/O, normally open (vacuum generation) with ejector pulse
-OPE N/O, normally open (vacuum generation) with power ejector
pulse
-CE N/C, normally closed (no vacuum generation) with ejector
pulse
Normal position of the vacu-
um generator
-CPE N/C, normally closed (no vacuum generation) with power
ejector pulse
Electrical connection -N M12 plug (5-pin)
Vacuum sensor -LK IO-Link
- barAlternative vacuum display
-H InHg (indication on display)
Tab. 3 Overview of variants
Product overview
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5.1.2 Display components
1Status BDC1 (Out A, air save)/BDC2 (Out A)
2Status BDC3 (Out B)/diagnostics level 1-2
3IO-Link communication status
44-digit alphanumeric display
5Toolbar for functions
6Segment bar to the right: graphic display of the cur-
rent status of the digital inputs or valve status
7B pushbutton
8A pushbutton
9EDIT button
10 Segment bar to the left: graphic display of the current
pressure value related to the maximum measured
value of the measuring range
Fig. 2 LCD display and operating buttons
Symbol Description
C flashes: IO-Link mode active
Threshold value comparator selected
"[SP]" Switching point
Window comparator selected
Product overview
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Symbol Description
"[SP]" + "[min]" lower switching point
"[SP]" + "[max]" upper switching point
"[HY]" Hysteresis
"[NO]"/"[NC]" Switching logic N/O contact (normally open) / N/C contact (normally
closed)
"[TeachIn]" Teach function (teach-in) active
"[Option]" Air saving function active
"[Lock]" Security code active
<IOL> +" [Lock]" Device access lock active
The device can only be configured and parameterised in IO-Link mode.
Segments of the graphic display of the current status of the digital inputs
or valve status.
– Segment L10: status of the vacuum solenoid valve. Valve is switched
when the segment is lit.
– Segment L12: status of the ejector pulse solenoid valve. Valve is
switched when the segment is lit.
– Segment L16: status of the digital switching input DI1 (suction).
Switching input set when segment is lit.
– Segment L18: status of the digital switching input DI2 (ejection).
Switching input set when segment is lit.
Tab. 4 Symbols in display
Display Description
Segment L17 + "[A]" lit and "[min]" flashing Minimum pressure value display
Segment L17 + "[A]" lit and "[max]" flash-
ing
Maximum pressure value display
Segment L18 + "[B]" lit and "[msec]" +
"[_|¯¯|_]" flashing
Duration of ejector pulse
Product overview
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Display Description
Segments L1, L3, L4, L5 lit and Diagnostics of evacuation and pressurisa-
tion times
"[msec]" + "[_|¯]" + "[min]" flashing Display of minimum evacuation time
"[msec]" + "[_|¯]" + "[max]" flashing Display of maximum evacuation time
"[msec]" + "[¯|_]" + "[min]" flashing Display of minimum pressurisation time
"[msec]" + "[¯|_]" + "[max]" flashing Display of maximum pressurisation time
"[msec]" + "[_|¯]" + "[SP]" + "[max]" flash-
ing
Display/setting of evacuation time critical
limit value
"[msec]" + "[¯|_]" + "[SP]" + "[max]" flash-
ing
Display/setting of pressurisation time crit-
ical limit value
Segments L1, L2, L5, L6 lit and display
"<ON>" - "[Option]" flashing
Setting of air saving function (EDIT mode)
"<ON>": air saving function active
"<OFF>": air saving function not active
Segments L1, L2, L5, L6 lit and "[Lock]"
flashing
Setting the security code (1...9999)
<OFF>: security code is not active
Segment L10 + "[B]" lit + display "<FORC>" Additional function of the electrical manual
override via operating buttons
Vacuum solenoid valve switched
Segment L12 + "[B]" lit + display "<FORC>" Additional function of the electrical manual
override via operating buttons
Ejector pulse solenoid valve (Eject)
switched
Tab. 5 Examples for additional displays of segment bars
5.2 Function
Function overview
The OVEM-LK is a vacuum generator with digital transmission of setpoint and actual value as well as
diagnostics and parameterisation options. Communication takes place in IO-Link mode. SIO mode is
supported.
– IO-Link parameters and functions in accordance with Smart Sensor profiles
– 2 binary data channels for programming switching functions and switching characteristics.
SIO mode: local configuration via the operating buttons. In the SIO mode, OVEM has the function of a
2P variant (1 switching input, 2 switching outputs).
Product overview
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– Control of the compressed air supply with 2 valve functions è 5.2.2 Valve control
– Auto-drop function: generation of an automatic ejector pulse/power ejector pulse for accelerated
vacuum purging and safe set-down è 5.2.2 Valve control
– Air saving function è 5.2.3 Air saving function
– Electrical and mechanical manual override
–è 9.1 Mechanical manual override
–è 9.2 Electrical manual override
– Monitoring of vacuum build-up by integrated pressure sensor. If the setpoint value is reached, or
if it is not reached due to malfunctions (e.g. leakage, dropped workpiece), the vacuum generator
sends an electrical signal and a status message.
– Internal check valve prevents vacuum purging if vacuum generation is interrupted.
– Data storage and expanded monitoring function.
5.2.1 Switching functions
The binary outputs can be configured via the switching functions. The switching status information is
thereby made available at the electrical connection as a process value or binary signal.
– IO-Link mode: 3 BDC (binary data channels), bit 0: BDC1 or BDC2, bit 1: BDC3
è 14.1.3 Process data
– SIO mode: 2 switching outputs Out A and Out B
The switching logic of the binary outputs can be configured as normally open (N/O contact) or nor-
mally closed (N/C contact). The switching mode of the binary outputs can be specified as threshold
value or window comparators.
Threshold value comparator Normally open (N/O contact) Normally closed (N/C contact)
Switching function:
– 1 switching point (SP1)
TEACH mode1):
– 2 teach points (TP1, TP2)
– SP1 = ½ (TP1+TP2)
1) TP1 = minimum pressure value, TP2 = maximum pressure value, independent of the teach-in sequence
Tab. 6 Threshold value comparator: setting of switching point SP1 and hysteresis HY
Window comparator Normally open (N/O contact) Normally closed (N/C contact)
Switching function:
– 2 switching points (SP1,
SP2)
TEACH mode1):
– 2 teach points (TP1, TP2)
1) TP1 = minimum pressure value, TP2 = maximum pressure value, independent of the teach-in sequence
Tab. 7 Window comparator: setting of switching points SP1, SP2 and hysteresis HY
5.2.2 Valve control
The vacuum solenoid valve or the ejector pulse solenoid valve is controlled as defined by the input
signal.
Product overview
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– IO-Link mode: 2 BCS (binary control signals), bit 0: BCS1, bit 1: BCS2 è 14.1.3 Process data
– SIO mode: 1 switching input DI1 (Z BCS1). Switching input positive switching (PNP)
Control of the ejector pulse
– Auto-drop function
The ejector pulse is generated after the “Suction” signal change (BCS1).
The pulse length can be set by the “Auto-drop time” parameter è Tab. 27 Device parameters
Destruction of the vacuum sensor due to overpressure (-CPE/-OPE)
The exhaust duct is sealed tightly during the power ejector pulse. This can cause overpressure at the
vacuum port and destroy the vacuum sensor.
• Use power ejector pulse only in open vacuum systems.
Product overview
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1Control signal BCS1/switching input DI1
2Control signal BCS2
3Switching position of vacuum solenoid
valve
4Switching position of ejector pulse solenoid
valve
5Vacuum port (2)
tab Duration of ejector pulse
Fig. 3 Valve control switching characteristics
5.2.3 Air saving function
The air saving function reduces air consumption during the evacuation phase.
Product overview
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1Hysteresis
2Threshold value "Switch off suction" =
switching point SPA1
3Threshold value “Switch on suction”
4Ejector pulse
Fig. 4 Mode of operation of the air saving function
If the pressure value has reached switching point SP1 2, vacuum generation is deactivated. An
internal check valve prevents 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 power consumption,
vacuum generation is not switched on until it falls below the lower threshold value 3.
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 .
5.2.4 Monitoring and diagnostics
The vacuum generator has monitoring functions that enable early detection of malfunctions or faults
during operation.
– Monitoring of process parameters (pressure value at the vacuum connection, switching points,
switching outputs and switching inputs, evacuation time tE, pressurisation time tB and critical limit
values)
– Diagnostic messages è 11.2 Diagnostic levels
– Fault detection è 11 Fault clearance
The monitoring functions are activated at the factory (except monitoring of the evacuation and pres-
surisation times). The time monitoring can be activated through setting of the critical limit values SP1
(evacuation time) and SP2 (pressurisation time) in BDC4 è Tab. 26 Smart Sensor profile parameters
Product overview
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The switching status information of the BDC4 is not included in the process input data (Process data
IN).
5.2.5 Measured variables
Pressure value (vacuum)
The pressure value (vacuum) between the vacuum port and filter is continuously measured.
In the OVEM-...-20/30-C, the pressure value (vacuum) between the filter and the check valve is con-
tinuously monitored.
The minimum and maximum measured pressure values are saved. If the operating voltage of the vacu-
um generator is switched off, these values are reset.
Cycle time
A cycle covers the time from the start of evacuation through ejection to the start of the new evacu-
ation.
Evacuation time and pressurisation time
The evacuation time tE is measured from the start of evacuation until reaching of the switching point
SP1 by BDC1 or BDC2.
The pressurisation time tBis measured from the start of pressurisation to the time at which the pres-
sure value (vacuum) falls below -50mbar.
Product overview
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1Switching point SP1 (BDC1 or BDC2)
2Reset point RSP1 (BDC1 or BDC2)
tE Evacuation time
tB Pressurisation time
Fig. 5 Cycle time - example for Out A (air save)
5.2.6 Teach function
The Teach function enables configuration of the switching points and time monitoring during runtime.
Static teach-in
Depending on the Teach command, one switching point (SP) or 2 switching points (SP1, SP2) are
determined from 2 teach points. The switching points are determined statically, that is, the measure-
ment value remains constant during the entire teach-in procedure. The air saving function is deactiv-
ated during execution of the teach-in procedure.
– Teach commands è Tab. 32 Command code
– Simplified Teach commands “BDCx Start” (Start Teach), “BDCx Stop” (Stop Teach) can be used
independently of the switching function. The sequence of the teach points need not be con-
sidered.
– For all commands, the desired channel must first be selected.
Product overview
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Dynamic teach-in
Setpoint values are calculated within the teach-in procedure from a time period. The procedure is
used to determine evacuation and air supply times. è Fig.6
After the start of the teach-in, time tE and tB are measured at every cycle. The times are averaged over
multiple cycle times. At the end of the teach-in, a function reserve of 100%is added to the averaged
values.
1Transport time
2Return time
3Cycle time 1
4Cycle time 2
5Cycle time N
Fig. 6 Dynamic teach-in mode of operation
5.2.7 Data storage
The data storage mechanism (DS) permits consistent and updated saving of device parameters to
higher levels, such as PLC programs or fieldbuses. The vacuum generator sends changes to the para-
meters to the IO-Link Master, which receives the parameter, saves it in a higher-order system and can
make it available to the new device if the vacuum generator is replaced.
– Parameters that can be saved è 14.1 Technical data for parameterisation interface
– The data storage mechanism is supported at the device, but is administered by the application
(IO-Link Master).
5.2.8 Block parameterisation
Block parameterisation permits uniform access to parameters over multiple indexes or subindexes as
well as transfer of entire parameter sets.
– Transfer of block parameters by start and end commands è Tab. 32 Command code
– Parameter changes (e.g.through teach-in) are blocked during the transfer.
– In case of an invalid parameter set, the changed parameters are discarded and the previous para-
meter set is reactivated.
Product overview
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5.2.9 Operating statuses and menu structure
Meaning of symbols for representing the menu structure
Symbol Meaning
Automatic return to the RUN mode when the monitoring time has expired (here
80seconds)
Press EDIT button for 3 seconds: manual return to RUN mode
Symbol on the display flashes (here display segment for switching output Out A)
Input blocked/not blocked
Press individual pushbutton (here A pushbutton)
Press A or B pushbutton, set value
Press buttons simultaneously (here: B pushbutton and EDIT button)
Press the EDIT button
Branching
Error display
Reset values
Cycle
Vacuum solenoid valve switched
Ejector pulse solenoid valve switched
Teach point is accepted
Special menu (SPEC) is active (setting air saving function, security code, max. evacu-
ation and max. air supply time)
Tab. 8 Meaning of symbols for representing the menu structure
RUN mode
– Basic status after the operating voltage is applied
– Display of the current measured value (relative pressure)
– Display of the signal statuses of the solenoid valves
– Display of the selected inputs and outputs
Product overview
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SHOW mode
– Display of the current settings
– Display and delete minimum and maximum pressure values
– Display and delete minimum and maximum evacuation and pressurisation time
– Display of diagnostic messages
Fig. 7 Menu structure for SHOW mode in SIO mode
Product overview
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