Configuring the AS-Interface safety monitor
4.3 Creating and changing a configuration
ASIMON V3 - Configuration software for AS-Interface safety monitor
Programming and Operating Manual, Edition 09/2008, GWA 4NEB 333 1558 02 DS 02 95
External device monitoring circuit for dependent, second OSSD
Icon
Functional device External device monitoring circuit for dependent, second OSSD
Parameter
Name: max. 29 ASCII characters plaintext
Switching time: 10 … 1000ms, switching time of the contactor
Limited error lock: with / without
Input mask
Description
The external device monitoring circuit for a second, dependent OSSD is functionally identical
with a normal external device monitoring circuit. It monitors the downstream contactor on the
second channel, but acts on the validation of channel 1.
As long as the safe outputs are switched off, the input contactor monitor on the AS-Interface
safety monitor must be active = ON . After the safe outputs have been switched on (validation),
the input contactor monitor is not relevant for set switching time. Afterward, the input must be
inactive = OFF. The state of the contactor monitor is active = ON (switched on).
After the safe outputs have been switched off, the state of the contactor monitor returns to
inactive = OFF (switched off) and the input contactor monitor is not queried for the set swit-
ching time. Afterward, the input contactor monitor must again be active= ON.
Contactor monitoring prevents the monitor from being switched back on for the duration of the
set switching time after it is switched off. This should allow all downstream contactors to reach
the idle state before contactor monitoring again queries the input signal, thereby preventing an
error lock.
Note
This EDM device can only be used in the 1st OSSD of a configuration with two dependent out-
put groups.
Type Designation in the configuration log
61 external device monitor channel two
Variants
Error lock SUBTYPE: none
Limited error lock SUBTYPE: limited error lock