Festo OVEM-07-H-B-QO-CE-N-2P Manual

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8125662
OVEM
Vacuum generator
8125662
2020-05h
[8125664]
Operating instructions
3Festo — OVEM — 2020-05h
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............................................................................................... 10
5.2 Function....................................................................................................................... 14
5.2.1 Switching functions................................................................................................ 15
5.2.2 Valve control...........................................................................................................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........................................................................................................ 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.................................................................................................... 30
8 Commissioning............................................................................................................ 32
8.1 Commissioning the vacuum generator......................................................................... 32
8.2 Setting the intensity of the ejector pulse...................................................................... 33
9 Operation and use....................................................................................................... 34
9.1 Setting the ejector pulse duration................................................................................ 34
9.2 Configuring switching outputs...................................................................................... 35
9.3 Setting the switching characteristics of a switching output........................................... 35
9.4 Set diagnostic message channel.................................................................................. 36
9.5 Teach-in switching point............................................................................................... 37
9.6 Deleting minimum or maximum pressure value............................................................ 37
9.7 Setting critical limits for the evacuation and air supply times........................................38
9.8 Teaching evacuation and air supply time...................................................................... 38
9.9 Displaying evacuation and air supply times.................................................................. 39
9.10 Deleting evacuation and air supply times..................................................................... 39
9.11 Mechanical manual override......................................................................................... 40
Table of contents
9.12 Electrical manual override............................................................................................. 40
9.13 Activating the security code...........................................................................................41
9.14 Switching air saving function on or off...........................................................................41
9.15 Restore factory settings.................................................................................................41
10 Maintenance and care.................................................................................................. 42
11 Fault clearance............................................................................................................. 43
11.1 Diagnostic levels........................................................................................................... 43
11.2 Error messages and error codes.................................................................................... 44
11.3 Malfunctions..................................................................................................................45
12 Disassembly................................................................................................................. 46
13 Disposal........................................................................................................................47
14 Technical data.............................................................................................................. 47
4 Festo — OVEM — 2020-05h
5Festo — OVEM — 2020-05h
1 About this document
1.1 Applicable documents
All available documents for the product www.festo.com/sp.è
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 www.festo.com/catalogue.è
– Spare parts www.festo.com/spareparts.è
4 Service
Contact your regional Festo contact person if you have technical questions www.festo.com.è
5 Product overview
Further information
6 Festo — OVEM — 2020-05h
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 Fig.2è
12 Electrical connection
13 Size OVEM-...-C
Fig. 1 Operating elements and connections
Filter housing with inspection window only with OVEM-...-B/-BN
5.1.1 Product variants
Product variant Code Meaning
Vacuum generator OVEM Vacuum generator with solenoid valve and manual over-
ride
Product overview
7Festo — OVEM — 2020-05h
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 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)
prepared for common supply manifold, vacuum port
with QS push-in fittings, exhaust port with open silencer
(-B-PO/-C-PO)
Pneumatic ports
-PO
prepared for common supply manifold, vacuum port
with QS push-in fittings inch, exhaust port with open
silencer (-BN-PO)
Product overview
8 Festo — OVEM — 2020-05h
Product variant Code Meaning
-ON N/O, normally open (vacuum generation)
-OE N/O, normally open (vacuum generation) with ejector
pulse
-OPE N/O, normally open (vacuum generation) with power
ejector pulse (-C)
-CN N/C, normally closed (no vacuum generation)
-CE N/C, normally closed (no vacuum generation) with eject-
or pulse
Normal position of the
vacuum generator
-CPE N/C, normally closed (no vacuum generation) with
power ejector pulse (-C)
Electrical connection -N M12 plug (5-pin)
Vacuum sensor
- Without vacuum sensor (switching input PNP)
-1PD 1 switching output 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…
Alternative vacuum display
- bar (-B/-C), InHg (-BN)
-B bar (-BN)
-W InH20 (-BN)
-H InHg (-B/-C)
Tab. 3 Overview of variants
Product overview
9Festo — OVEM — 2020-05h
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
10 Festo — OVEM — 2020-05h
Function OVEM-...
-2P/2N/P-
U/PI
OVEM-...
-1PD
Generation of an ejector pulse/power ejector pulse via a control signal at
the digital switching input (Eject) DI2
- x
Tab. 7 Function overview
5.2.1 Switching functions
The solenoid valve for vacuum generation switches as an N/C or N/O contact, depending on the ver-
sion, when pressurised with compressed air.
The switching outputs can be configured via the switching functions. The switching mode of the
switching outputs can be set 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 = (TP1+TP2)½
1) TP1 = minimum pressure value, TP2 = maximum pressure value, independent of the teach-in sequence
Tab. 8 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. 9 Window comparator: setting of switching points SP1, SP2 and hysteresis HY
Code Switching output A Switching output B Switching inputs
-1PD Switching output positive
switching pressure sensor
outputA
- 2switching inputs, positive
switching
-2P Switching output positive
switching pressure sensor
outputA
Switching output positive
switching pressure sensor
outputB or diagnostic mes-
sage channel
Switching input positive
switching
Product overview
15Festo — OVEM — 2020-05h
Code Switching output A Switching output B Switching inputs
-2N Switching output negative
switching pressure sensor
outputA
Switching output negative
switching pressure sensor
outputB or diagnostic mes-
sage channel
Switching input negative
switching
-PI Switching output positive
switching pressure sensor
outputA
Analogue output 4 20mA…
vacuum
Switching input positive
switching
-PU Switching output positive
switching pressure sensor
outputA
Analogue output 0 10V…
vacuum
Switching input positive
switching
Tab. 10 Switching output and switching input variants
5.2.2 Valve control
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 set 9.1 Setting the ejector pulse duration. è
– Signal-controlled ejector pulse/power ejector pulse (OVEM-...-1PD only)
The ejector pulse is generated via a control signal at the digital switching input (ejection) DI2. The
duration of the ejector pulse can be set via the duration of the control signal at the digital switch-
ing input (ejector) DI2. The vacuum solenoid valve or the ejector pulse solenoid valve is controlled
as defined by the input signal.
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
16 Festo — OVEM — 2020-05h
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 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
17Festo — OVEM — 2020-05h
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 , vacuum generation is deactivated. An2
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 9.14 Switching air saving function on or off.è
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, pressurisation time tB and critical limit
values)
– Diagnostic messages 11.1 Diagnostic levelsè
Product overview
18 Festo — OVEM — 2020-05h
– Fault detection 11 Fault clearanceè
The diagnostic messages are shown on 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) 9.4 Set diagnostic message channel. è
The monitoring functions are activated at the factory (except for monitoring of the evacuation and
pressurisation times). The time monitoring can be activated through setting of the critical limits for
evacuation time and pressurisation
time 9.7 Setting critical limits for the evacuation and air supply times. è
5.2.6 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 switching point SP1 of the
switching output is reached.
The pressurisation time tBis measured from the start of pressurisation up to the time at which the
pressure value (vacuum) falls below −50mbar.
Product overview
19Festo — OVEM — 2020-05h
1Switching point SP1
2Reset point RSP1
tE Evacuation time
tB Pressurisation 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 Fig.3è
5.2.7 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.
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. Fig.6è
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
20 Festo — OVEM — 2020-05h
1Transport time
2Return time
3Cycle time 1
4Cycle time 2
5Cycle time N
Fig. 6 Mode of operation of dynamic teach-in - example OVEM-…-CE/-CPE
5.2.8 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
Product overview
21Festo — OVEM — 2020-05h
Direct mounting
Fig. 10 Direct mounting on the side
Variant Screws Tightening torque
OVEM-...-05/-07/-10-...-B/-BN M5 max. 2.5Nm
OVEM-...-14/-20-...-B/-BN M4 max. 2.5Nm
OVEM-...-20/-30-...-C M6 max. 2.5Nm
Tab. 12 Size and tightening torque of the screws for direct mounting on the side
Fig. 11 Direct mounting on the back
Variant Screw Tightening torque
OVEM-...-05/-07/-10/-14/-20-...-B/-BN M3 max. 0.8Nm
OVEM-...-20/-30-...-C M4 max. 0.8Nm
Tab. 13 Size and tightening torque of the screws with direct mounting on the back
Assembly
26 Festo — OVEM — 2020-05h
H-rail mounting
Type of mounting permissible only for sizes OVEM-...-05/-07/-10/-14/-20-...-B/-BN
H-rail mounting accessories www.festo.com/catalogueè
1H-rail mounting 2Screw
Fig. 12 H-rail mounting
1. Attach mounting plate on H-rail mounting .1
2. Attach OVEM with H-rail mounting to the H-rail and press in the direction of the arrow.
3. Secure to the H-rail with screw .2
Mounting with mounting bracket
Type of mounting permissible only for sizes OVEM-...-05/-07/-10/-14/-20-...-B/-BN
Accessories for mounting bracket www.festo.com/catalogueè
Fig. 13 Mounting with mounting bracket
Assembly
27Festo — OVEM — 2020-05h
Circuit Diagrams
OVEM without vacuum sensor
Tab. 21 Circuit diagrams for vacuum generator
8 Commissioning
Commissioning by qualified personnel.
8.1 Commissioning the vacuum generator
At initial commissioning, the vacuum generator is placed in operation with the factory settings
è Tab. 22 Factory settings.
Requirement
Vacuum generator is fully mounted and connected 6 Assembly.è
Checking operating conditions
• Check operating conditions and critical limits 14 Technical data.è
Commissioning the vacuum generator OVEM-...-OE/-OPE
1. Apply operating pressure to supply port (1).
ÄNegative pressure is generated at the vacuum port (2).
2. Switch on the operating voltage.
ÄThe current pressure is displayed and the vacuum generator is ready for operation.
Commissioning the vacuum generator OVEM-...-CE/-CPE
1. Apply operating pressure to supply port (1).
2. Switch on the operating voltage.
3. Activate suction: apply input signal to pin 5.
ÄNegative pressure is generated at the vacuum port (2). The current pressure is displayed and
the vacuum generator is ready for operation.
Changing the operating pressure changes the power of the negative pressure at the vacuum port. This
allows the vacuum to be adjusted.
Functions and parameters can be specified:
– manually at the device EDIT modeè
– by teach-in TEACH modeè
Commissioning
32 Festo — OVEM — 2020-05h
8.2 Setting the intensity of the ejector pulse
Fig. 14 Set the intensity of the ejector pulse
Requirement
– Vacuum generator is in operation
Feed through with automatic ejector pulse (-2P/-2N/-NU/-NI/-PU/-PI)
1. Screw in the flow control screw completelyaJ
ÄThe channel for the ejector pulse is closed. An ejector pulse is not generated.
2. Switch on vacuum generation.
ÄNegative pressure is generated at the vacuum port.
3. Switch off vacuum generation.
4. Unscrew flow control screw slightly.
ÄAn automatic ejector pulse is generated. If an automatic ejector pulse is not generated, oper-
ate the mechanical manual override of the ejector pulse solenoid valve.
5. Screw the flow control screw out or in to adjust the ejector pulse to the required intensity.
Setting the ejector pulse duration 9.1 Setting the ejector pulse durationè
The use of large suction cups with connectors can create a device-independent vacuum due to the
interference resistance when the suction cup with connector is detached from the workpiece.
Set up the ejector pulse accordingly.
Requirement
– Vacuum generator is in operation
Procedure without automatic ejector pulse (1PD)
1. Completely screw in flow control screw for regulation of the ejector pulse.
2. Switch on vacuum generation.
ÄNegative pressure is generated at the vacuum port (2).
3. Switch off vacuum generation.
Commissioning
33Festo — OVEM — 2020-05h

Produkt Specifikationer

Mærke: Festo
Kategori: Ikke kategoriseret
Model: OVEM-07-H-B-QO-CE-N-2P

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