Version 10.12.2019
WERAC Elektronik GmbH
page 15
6.11.4 Fixed Blanking (of selected light beams)
The Fixed Blanking function is used to monitor the light grid in areas that are not permanently
blanked. The blanked lines are also monitored for light reception. If light is received, it is
switched off immediately. These areas must be mechanically protected against unauthorised
access. If this mechanical protection is omitted, monitoring of the light curtain ensures that it is
switched off immediately and that safety remains intact. The bypassing function is also
available in the Fixed Blanking mode. This can be activated via contact pairs 1 and/or 2. A
detailed description of the bridging function can be found in chapter 6.11.6.
6.11.5 Teach-in of the safety modes
To change the operating mode the following procedure must be met:
In mode 0 as AOPD (electro-sensitive protective device) and for the WGN 100-2:
same procedure as described in chapter 6.10.1 (Alignment of transmitters and receivers).
In mode 1 as AOPD with additional bypassing function:
1. device in OFF state (supply voltage off)
2. set DIP switch S1-1 to the following position:
3. switch on the device
4. if necessary, align the light grid optimally as described under 6.10.1 (c) to (e)
5. switch OFF dip S1-1.
After a pause of 5-7s (to remove the hand from the protected area, this is indicated by the
flickering red LED), the control unit saves the mode and the reference values of the individual
lines in the read-only memory. When this process is completed, the red LED starts flashing.
To exit the adjustment mode, switch the power and then DIP S1-2 off.
6. After the power supply is switched on again, the light grid goes into waiting mode (red and
yellow LEDs light up). It switches to green (OSSD = ON) as soon as the start release is
activated and the light grid is free.
7. In normal operation in mode 1, the DIP switch is set:
In mode 2 as AOPD with additional function reduced resolution and bypassing:
1. device in OFF state (supply voltage off)
2. set DIP switch S1-1 to the following position:
3. switch on the device
4. if necessary, align the light grid optimally as described under 6.10.1 (c) to (e)
5. Close the two normally open contacts connected to contact pair 1. All LEDs switch off, the
red LED lights up when all lines are interrupted.
6. cover the lines to be blanked. If all lines to be blanked are correctly covered, the two NO
contacts must be opened. The lines to be blanked out for the reduced resolution are taught
in or accepted. Caution: At least one line must remain uncovered, else no line will be
specified as blanked! Now the yellow LED lights up again if the protective field is clear and
has reserve, the red LED if at least one line is interrupted and no LED if light is received
but not sufficient for safe operation.
7. Clear the light girds guarded area completely and check the optimum alignment once
again.
8. Switch off dip S1-1.
After a pause of 5-7s (to remove the hand from the protected area, this is indicated by the
flickering red LED), the control unit saves the mode, the lines to be blanked and the
reference values of the individual lines in the read-only memory. When this process is
completed, the red LED starts flashing. To exit the adjustment mode, the power supply and
then DIP S1-2 must be switched off.
9. After the power supply is switched on again, the light grid goes into waiting mode (red and
yellow LEDs light up). It switches to green (OSSD = ON) as soon as the start release is
activated and the light grid is free.
Dip S1
on
off
1
2
3
4
5 6
Dip S1
on
off
1
2
3
4
5 6
Dip S1
on
off
1
2
3
4
5 6
Dip S1
on
off
1
2
3
4
5 6
Dip S1
on
off
1
2
3
4
5 6
Dip S1
on
off
1
2
3
4
5 6
Dip S1
on
off
1
2
3
4
5 6
