Festo OVEM Series Parts list manual

8109413
OVEM
Vacuum generator
8109413
2019-03g
[8109415]
Instructions| Operat-
ing

Translation of the original instructions
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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......................................................................................................... 7
5.1 Product design............................................................................................................. 7
5.1.1 Product variants......................................................................................................8
5.1.2 Display components............................................................................................... 10
5.2 Function....................................................................................................................... 14
5.2.1 Switching functions................................................................................................ 14
5.2.2 Valve controller.......................................................................................................16
5.2.3 Air saving function.................................................................................................. 17
5.2.4 Optimisation of the transport time..........................................................................18
5.2.5 Monitoring and diagnostics.................................................................................... 18
5.2.6 Measured variables................................................................................................ 19
5.2.7 Teach function (teach-in)........................................................................................ 20
5.2.8 Operating statuses and menu structure..................................................................21
6 Assembly..................................................................................................................... 25
7 Installation.................................................................................................................. 28
7.1 Pneumatic installation.................................................................................................. 28
7.2 Electrical installation.................................................................................................... 29
8 Commissioning............................................................................................................ 31
8.1 Commissioning vacuum generator............................................................................... 31
8.2 Set the intensity of the ejector pulse............................................................................ 31
9 Operation and use....................................................................................................... 32
9.1 Setting the ejector pulse duration................................................................................ 32
9.2 Configuring switching outputs...................................................................................... 33
9.3 Setting the switching characteristics of a switching output........................................... 33
9.4 Set diagnostic message channel.................................................................................. 34
9.5 Teach-in switching points............................................................................................. 35
9.6 Deleting minimum or maximum pressure value............................................................ 35
9.7 Setting critical limits for the evacuation and air supply times........................................36
9.8 Teaching evacuation and air supply time...................................................................... 36
9.9 Displaying evacuation and air supply times.................................................................. 37
9.10 Deleting evacuation and air supply times..................................................................... 37
9.11 Electrical manual override............................................................................................ 38
Table of contents

9.12 Mechanical manual override..........................................................................................38
9.13 Activating security code.................................................................................................39
9.14 Switching air saving function on or off...........................................................................39
9.15 Restore factory settings.................................................................................................40
10 Maintenance and care.................................................................................................. 40
11 Error messages and fault clearance............................................................................. 41
11.1 Diagnostic levels........................................................................................................... 41
11.2 Error messages and error codes.................................................................................... 42
11.3 Malfunctions..................................................................................................................43
12 Disassembly.................................................................................................................45
13 Disposal........................................................................................................................45
14 Technical data.............................................................................................................. 45
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1 About this document
1.1 Applicable documents
All available documents for the product èwww.festo.com/pk.
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.
Further information
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5 Product overview
5.1 Product design
1Solenoid valve ejector pulse (eject)
2Vacuum solenoid valve
3Mechanical manual override of the solenoid
valves
4Compressed air connection (1)
5Exhaust port / silencer (3)
6Vacuum connection (6)
7Housing with mounting holes
8Slide for changing the filter
9Filter housing with display window
10 Flow control screw for adjusting the ejector
pulse
11 Vacuum sensor with LCD display and operat-
ing keys
12 Electrical connection
13 Size OVEM-...-C
Fig. 1 Operating elements and connections
Filter housing with display window only with OVEM-...-B/-BN
Product overview
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5.1.1 Product variants
Product variant Code Meaning
Vacuum generator OVEM Vacuum generator with vacuum solenoid valve ON/OFF
and electric manual override
-05 0.45mm
-07 0.7mm
-10 0.95mm
-14 1.4mm
-20 2.0mm
Nominal width laval nozzle
-30 3.0mm
-H high negative pressureVacuum type
-L high suction volume
-B 20 mm wide, ISO standard
-BN 20 mm wide, NPT
Housing size / width
-C 36 mm wide, ISO standard
all ports with QS push-in fittings (-B-QS/-C-QS)-QS
all ports with QS push-in fittings inch (-BN-QS)
Supply / vacuum port with QS push-in fittings, exhaust
port with open silencer (-B-QO/-C-QO)
-QO
Supply / vacuum port with QS push-in fittings inch,
exhaust port with open silencer (-BN-QO)
all ports with G female thread (-B-GN/-C-GN)-GN
all ports with NPT female thread (-BN-GN)
Supply / vacuum port with G female thread, exhaust port
with open silencer (-B-GO/-C-GO)
-GO
Supply / vacuum port with NPT female thread, exhaust
port with open silencer (-BN-GO)
prepared for common supply manifold, vacuum and
exhaust port with QS push-in fittings (-B-PL/-C-PL)
-PL
prepared for common supply manifold, vacuum and
exhaust port with QS push-in fittings inch (-BN-PL)
Pneumatic connections
-PO prepared for common supply manifold, vacuum port
with QS push-in fittings, exhaust port with open silencer
(-B-PO/-C-PO)
Product overview
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Product variant Code Meaning
Pneumatic connections -PO prepared for common supply manifold, vacuum port
with QS push-in fittings inch, exhaust port with open
silencer (-BN-PO)
-ON NO, normally open (vacuum generation)
-OE NO, normally open (vacuum generation) with ejector
pulse
-CN NC, normally closed (no vacuum generation)
Normal position of the
vacuum generator
-CE NC, normally closed (no vacuum generation) with ejector
pulse
Electrical connection -N M12 plug (5-pin)
-1PD 1 switching output PNP, 2 switching inputs PNP, with
display
-2P 2 switching outputs PNP
-2N 2 switching outputs NPN
-PU 1 switching output PNP, 1 analogue output 0…10V
Vacuum sensor
-PI 1 switching output PNP, 1 analogue output 4…20mA
- bar (-B), InHg (-BN)
-B bar
-W InH20
Alternative vacuum display
-H InHg
Tab. 3 Overview of variants
Product overview
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5.1.2 Display components
1Display segment switching output Out A
2Display segment switching output Out B
(except OVEM-...-1PD)
3Display segment switching input In A1
(except OVEM-...-1PD)
44-digit alphanumeric display
5Toolbar for functions
6Segment bar right: graphic display of the
current status of the digital inputs or valve
status
7B pushbutton
8A pushbutton
9EDIT button
10 Segment bar left: graphic display of the cur-
rent pressure value related to the maximum
measured value of the measuring range
Fig. 2 LCD display and operating keys
Symbol Description
Threshold value comparator selected
"[SP]" Switching point
Product overview
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Symbol Description
Window comparator selected
"[SP]" + "[min]" lower switching point
"[SP]" + "[max]" upper switching point
"[HY]" Hysteresis
"[NO]"/"[NC]" Switching logic NO contact (normally open) / NC contact (normally closed)
"[TeachIn]" Teach function (teach-in) active
"[Option]" Air-saving function active
"[Lock]" Security code active
Segments display the following:
– current status of the digital inputs
– current valve status
è Tab. 5 OVEM-...-2P/-2N/PU/PI: additional displays of segment bars –
Examples and
è Tab. 6 OVEM-...-1PD: additional displays of segment bars – Examples
Tab. 4 Symbols in display
Display Description
Segment L10 is illuminated Vacuum solenoid valve is switched.
Segment L14 is illuminated Ejector pulse solenoid valve is switched.
Segment L17 + "[A]" illuminated and
"[min]" flashing
Minimum pressure value display
Segment L17 + "[A]" illuminated and
"[max]" flashing
Maximum pressure value display
Segment L18 + "[B]" are on and "[msec]" +
"[_|¯¯|_]" are flashing
Duration of ejector pulse
Product overview
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Display Description
Segments L1, L3, L4, L5 illuminated and Diagnostics of evacuation and air supply
times
"[msec]" + "[_|¯]" + "[min]" flashing Display of minimum evacuation time
"[msec]" + "[_|¯]" + "[max]" flashing Display of maximum evacuation time
"[msec]" + "[¯|_]" + "[min]" flashing Display of minimum air supply time
"[msec]" + "[¯|_]" + "[max]" flashing Display of maximum air supply time
"[msec]" + "[_|¯]" + "[SP]" + "[max]" flash-
ing
Display/Setting of evacuation time critical
limit
"[msec]" + "[¯|_]" + "[SP]" + "[max]" flash-
ing
Display/setting the air supply time critical
limit
Segments L1, L2, L5, L6 on and display
"<ON>" - "[optional]" flashing
Setting of air-saving function (EDIT mode)
"<ON>": air-saving function active
"<OFF>": air-saving function not active
Segments L1, L2, L5, L6 on and "[Lock]"
flashing
Setting the security code (1...9999)
<OFF>: security code is not active
Segment L10 + "[B]" on + display "<FORC>" additional function of the electrical manual
override via operating buttons
Vacuum solenoid valve switched
Segment L14 + "[B]" on + display "<FORC>" additional function of the electrical manual
override via operating buttons
Ejector pulse solenoid valve (Eject)
switched
Tab. 5 OVEM-...-2P/-2N/PU/PI: additional displays of segment bars – Examples
Display Description
Segment L10 is illuminated Vacuum solenoid valve is switched.
Product overview
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Display Description
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]" illuminated and
"[min]" flashing
Minimum pressure value display
Segment L17 + "[A]" illuminated and
"[max]" flashing
Maximum pressure value display
Segments L1, L3, L4, L5 illuminated
and
Diagnostics of evacuation and air sup-
ply times
"[msec]" + "[_|¯]" + "[min]" flashing Display of minimum evacuation time
"[msec]" + "[_|¯]" + "[max]" flashing Display of maximum evacuation time
"[msec]" + "[¯|_]" + "[min]" flashing Display of minimum air supply time
"[msec]" + "[¯|_]" + "[max]" flashing Display of maximum air supply time
"[msec]" + "[_|¯]" + "[SP]" + "[max]"
flashing
Display/Setting of evacuation time crit-
ical limit
"[msec]" + "[¯|_]" + "[SP]" + "[max]"
flashing
Display/setting the air supply time crit-
ical limit
Segments L1, L2, L5, L6 on and display
"<ON>" - "[optional]" flashing
Setting of air-saving function (EDIT
mode)
"<ON>": air-saving function active
"<OFF>": air-saving function not active
Segments L1, L2, L5, L6 on and
"[Lock]" flashing
Setting the security code (1...9999)
<OFF>: security code is not active
Product overview
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Display Description
Segment L10 + "[B]" on + display
"<FORC>"
additional function of the electrical
manual override via operating buttons.
Vacuum solenoid valve switched
Segment L12 + "[B]" illuminated + dis-
play "<FORC>"
additional function of the electrical
manual override via operating buttons.
Ejector pulse solenoid valve (Eject)
switched
Tab. 6 OVEM-...-1PD: additional displays of segment bars – Examples
5.2 Function
Function overview
The OVEM is a vacuum suction nozzle with digital transmission of setpoint and actual value as well as
diagnostics and parameterisation options. It is configured with the operating keys. Diagnostic mes-
sages are shown on the display.
Function OVEM-...
-2P/2N
/PU/PI
OVEM-...
-1PD
Control of the compressed air supply with 2 valve functions
è 5.2.2 Valve controller
x x
Air saving function è 5.2.3 Air saving function x x
Electrical and mechanical manual override
è 9.11 Electrical manual override and è 9.12 Mechanical manual override
x x
Monitoring of the vacuum build-up by integrated pressure sensor and
advanced monitoring functionsè 5.2.5 Monitoring and diagnostics
x x
Auto-drop function:
Generation of an automatic eject pulse for accelerated vacuum purging
and safe set-down è 5.2.2 Valve controller
x -
Generation of an eject pulse via a control signal at the digital switching
input (ejection) DI2
- x
Tab. 7 Function overview
5.2.1 Switching functions
The switching outputs can be configured via the switching functions. The switching logic of the switch-
ing outputs can be configured as normally open (NO) or normally closed (NC). The switching mode of
the switching outputs can be set as threshold value or window comparator.
Product overview
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With active air saving function, the switching mode is set as the threshold value comparator by switch-
ing output A.
Threshold value comparator Normally open (NO) Normally closed (NC)
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 sequence
Tab. 8 Threshold value comparator: setting of switching point SP1 and hysteresis HY
Window comparator Normally open (NO) Normally closed (NC)
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 sequence
Tab. 9 Window comparator: setting of switching points SP1, SP2 and hysteresis HY
Code Switching output A Switching output B Switching inputs
-1PD - 2switching inputs
-2P Switching output positive
switching pressure sensor
outputB or diagnostic mes-
sage channel
-PI Analogue output 4…20mA
vacuum
-PU
Switching output positive
switching pressure sensor
outputA
Analogue output 0…10V
vacuum
1switching input positive
switching
-2N Switching output negative
switching pressure sensor
outputA
Switching output negative
switching pressure sensor
outputB or diagnostic mes-
sage channel
1switching input negative
switching
Tab. 10 Switching output and switching input variants
Product overview
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5.2.2 Valve controller
Control of the ejector pulse
– Auto-drop function (except for OVEM-...-1PD)
The ejector pulse is generated after the “Suction” signal change. The duration of the ejector pulse
can be setè 9.1 Setting the ejector pulse duration.
– 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.
Depending on the input signal, the vacuum solenoid valve or the ejector pulse solenoid valve is
controlled.
Product overview
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1Control signal at the digital switching input
(suction) DI1
2Control signal at the digital switching input
(ejection) DI2 (only OVEM-...-1PD)
3Switching position of vacuum solenoid
valve
4Switching position of ejector pulse solenoid
valve
5Vacuum connection (2)
tab Duration of ejector pulse
Fig. 3 Valve control switching behaviour
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 SP1
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 energy 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 è 9.14 Switching air saving function on or off.
5.2.4 Optimisation of the transport time
The transport time can be optimised for variants with 2 switching outputs (OVEM-...-2P/-2N/-PU/-PI)
by using switching output Out B.
The vacuum required for the transport is controlled by switching output Out A. To optimise the trans-
port time, the workpiece can e.g. be gripped by the usable vacuum while the vacuum is building up.
The minimum usable vacuum required is monitored by switching output Out B.
5.2.5 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, air supply time tB and critical limits)
– Diagnostic messages è 11.1 Diagnostic levels
– Fault detection è 11 Error messages and fault clearance
Product overview
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The diagnostic messages are shown in the display.
Switching output Out B can also be set as a diagnostic message channel (dI 1 or dI 2) for variants with
2 switching outputs (OVEM-...-2P/-2N)è 9.4 Set diagnostic message channel.
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 critical limits for evacuation
time and air supply timeè 9.7 Setting critical limits for the evacuation and air supply times.
5.2.6 Measured variables
Pressure value (vacuum)
The pressure value (vacuum) is continuously measured between the vacuum connection and filter.
With the OVEM-...-20/30-C the pressure value (vacuum) is continuously monitored between the filter
and the check valve.
The minimum and maximum measured pressure values are saved. If the operating voltage of the vacu-
um 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 evacu-
ation.
Evacuation time and air supply time
The evacuation time tE is measured from the start of evacuation until switching point SP1 of the
switching output is reached.
The air supply time tB is measured from the start of air supply to the time at which the pressure value
(vacuum) falls below −50mbar.
Product overview
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1Switching point SP1
2Reset point RSP1
tE Evacuation time
tB Air supply time
Fig. 5 Cycle time - example for Out A (air save)
The displayed sequence of the switching statuses and control signals applies to all product variants
except OVEM-...-1PD. Sequence for OVEM-...-1PD è Fig.3
5.2.7 Teach function (teach-in)
The Teach function enables configuration of the switching points and time monitoring during run time.
Static teach-in
Depending on the Teach command, one switching point (SP) or 2 switching points (SP1, SP2) are
determined from 2 teach-in points. The switching points are determined statically, that is, the meas-
urement value remains constant during the entire teach-in procedure. The air save function is deactiv-
ated for the duration of the teach-in procedure.
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.
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.
Product overview
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