Diagnostics / service
8.4 Diagnostics with MSS ES
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02
267
General
Status Symbol Meaning
Discrepancy condition violated Red is set if:
• The signal states at the inputs to be monitored vary after expiry of the
discrepancy time
• The signal states of all inputs to be monitored had not all previously
been reset simultaneously to the value "0" when they are set to "1"
Input
Status Symbol Meaning
Cross-circuit at input x Red A cross-circuit was detected at input x.
Start
Status Symbol Meaning
Start condition not fulfilled Yellow is set if:
• A discrepancy condition violation is present
• A cross-circuit is present
• If both pushbuttons were not pressed "synchronously", that is, they were
pressed with a time offset greater than 0.5 s
• The value "1" is not present simultaneously at IN1...2/4
Messages for mode selector switches
The function supports the following messages:
General
Status Symbol Meaning
Switchover time exceeded yellow The "1 out of 2...5 selection monitoring" has detected the value "0" at all
inputs after expiration of the contact switchover time.
Invalid operating mode selection red The "1 out of 2...5 selection monitoring" has detected after expiration of the
contact switchover time:
The value "1" is present at more than one input.
Messages for counter functions
The counter function supports the following messages:
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