Festo OVEM User manual

en Operating
instructions
8068021
1702e
[8068023]
Vacuum generator
OVEM

OVEM
2Festo – OVEM – 1702e
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
èResult of an action/References to more detailed information

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1 Product description 5.......................................................
1.1 Structure 5................................................................
1.2 Characteristics 6...........................................................
2 Security 7.................................................................
2.1 Use for intended purpose 7...................................................
2.2 General safety information 7..................................................
2.3 Range of applications and certifications 8.......................................
3 Function and application 9...................................................
3.1 Function overview 9.........................................................
3.2 Switching functions 10........................................................
3.3 Valve control 11.............................................................
3.4 Air-saving function 13........................................................
3.5 Optimisation of the transport time 14............................................
3.6 Monitoring and diagnostics 14.................................................
3.7 Measured variables 15........................................................
3.8 Teach function (Teach-In) 16...................................................
4 Installation 17..............................................................
4.1 Mechanical 17..............................................................
4.2 Pneumatic 19...............................................................
4.3 Electric 20..................................................................
5 Commissioning 23...........................................................
5.1 Commissioning vacuum suction nozzle 23........................................
5.2 Set the intensity of the ejector pulse 24..........................................
6 Operation 25...............................................................
6.1 Setting the ejector pulse duration 25............................................
6.2 Configure the switching outputs 26..............................................
6.2.1 Display switching output settings 26....................................
6.2.2 Setting the switching characteristics of a switching output 26................
6.2.3 Set diagnostic message channel 27.....................................
6.2.4 Teaching of switching points 28........................................
6.2.5 Deleting the minimum or maximum pressure value 28......................

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6.3 Configuring the evacuation and air supply times 29.................................
6.3.1 Setting the limit values for the evacuation and air supply times 29.............
6.3.2 Teaching the evacuation and air supply time 29............................
6.3.3 Displaying the evacuation and air supply times 30.........................
6.3.4 Deleting the evacuation and air supply times 30...........................
6.4 Operating manual override 31..................................................
6.4.1 Mechanical manual override 31........................................
6.4.2 Electrical manual override 31..........................................
6.5 Activating security code 32....................................................
6.6 Switching the air saving function on or off 32......................................
6.7 Restore factory settings 33....................................................
7 Error messages and fault clearance 34..........................................
7.1 Diagnostic levels 34..........................................................
7.2 Error messages and error codes 35..............................................
7.3 Malfunctions 37.............................................................
8 Disassembly 38.............................................................
9 Maintenance and care 38.....................................................
10 Technical data 39............................................................
11 Appendix 41................................................................
11.1 Graphic display and LCD displays 41.............................................
11.2 Operating statuses and menu structure 45........................................
11.2.1 Meaning of symbols for representing the menu structure 45.................
11.2.2 RUN mode 45......................................................
11.2.3 SHOW mode 46.....................................................
11.2.4 EDIT mode 47......................................................
11.2.5 Teach mode 48.....................................................

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1 Product description
1.1 Structure
1234
aJ
aA
aB
8
9
56
7
1Ejector pulse solenoid valve (Eject)
2Vacuum solenoid valve
3Mechanical manual override of the solenoid
valves
4Supply port (1)
5Exhaust port / silencer (3)
6Vacuum connection (2)
7Housing with mounting holes
8Slide for changing the filter element
9Filter housing with inspection window
aJ Flow control screw for adjusting the ejector
pulse
aA Vacuum sensor with LCD display and
operating keys èFig. 13
aB electrical connection
Fig. 1 Control sections and connections

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1.2 Characteristics
Characteristic Code Meaning
Vacuum suction nozzle OVEM Vacuum suction nozzle with vacuum solenoid valve ON/OFF
and electric manual override
Nominal width of laval
nozzle
-05 0.45 mm
-07 0.7 mm
-10 0.95 mm
-14 1.4 mm
-20 2.0 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 va
cuum generator
-ON NO, normally open (vacuum generation)
-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)

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Characteristic MeaningCode
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
2 Security
2.1 Use for intended purpose
The vacuum generator type OVEM is designed for generating a vacuum.
2.2 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.

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2.3 Range of applications and certifications
Note
CE declaration of conformity and certificatesèwww.festo.com/sp
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 E322346
Considered standards UL 61010-1
C22.2 No.61010-1
UL mark
Tab. 2 UL approval information
Only for connection to an NEC/CEC Class 2 supply.
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 61010-1 or a Limited Power Source (LPS) in accordance with
IEC/EN/UL/CSA 60950-1 or IEC/EN/UL/CSA 62368-1 or a Class 2 circuit in accordance with NEC or
CEC.

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3 Function and application
3.1 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 dia
gnostic 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
èChapter 3.3
x x
Air-saving function è Chapter 3.4 x x
Electrical and mechanical manual override èChapter6.4 x x
Monitoring of the vacuum build-up through integrated pressure
sensor and advanced monitoring functions èChapter 3.6
x x
Auto-Drop Function:
generation of an automatic eject pulse for accelerated vacuum
purging and safe set-down èChapter3.3
x -
Generation of an eject pulse via a control signal at the
digital switching input (ejection) DI2
- x
Tab. 3 Function overview

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3.2 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 compar
ator.
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 mode1):
– 2 Teach-in points (TP1, TP2)
– SP1 = ½ (TP1+TP2)
p
1
0
HY
OUT
SP1
TP1 TP2
p
1
0
SP1
HY
OUT
TP1 TP2
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
Window comparator Normally open (NO) Normally closed (NC)
Switching function:
– 2 switchpoints
(SP1, SP2)
Teach mode1):
– 2 Teach-in points (TP1, TP2) TP1=SP1
HY HY
p
1
0
OUT
TP2=SP2 TP1=SP2
p
1
0
OUT
HY HY
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