Edm; Wave - Pilz PSEN sc L 3.0 08-12 Series Operating Manual

Function description
5.11

EDM

Contactors installed outside the safety laser scanner can be monitored (external device
monitoring = EDM, also known as feedback loop monitoring).
EDM only needs to be activated if the contactors are controlled directly.
A test is performed to see that the N/C contacts switch if the state of the OSSDs changes;
this serves to monitor and detect malfunctions on the contactors. If a malfunction is detec-
ted, the safety laser scanner switches to a safe state and stops the connected machine.
This check is carried out each time the OSSDs are triggered and before restarting.
The EDM function is only available for OSSD pairs 1 and 2:
Fig.: Timing diagram for EDM
Legend
t
1
t
2
Use control elements whose dynamics match the times stated at t
When
The function must be activated in the PSENscan Configurator.
5.12

Wave

With the wave function, a safety laser scanner that is to be configured in a network can be
identified more easily from its position.
When starting the automatic search for a safety laser scanner in a network the wave button
can be selected.
The device found registers with the flashing message
Operating Manual PSEN sc L 3.0/5.5 08-12
1005056-EN-06
OSSD
24 V
EDM
After the OSSD has changed to the ON state, the EDM circuit must open within
350 ms
After the OSSD has changed to the OFF state, the EDM circuit must close within
100 ms
wiring [ 63], a configurable input must be used for the function.
On
Off
0 V
t
1
t
2
and t .
1 2
in the display.
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