Siemens SIMATIC ET 200SP Manual page 22

Product overview
3.2 Operating modes of the F-CM AS-i Safety ST
Response to code sequence errors
● Sporadic code sequence error
Momentary interruption to code sequence, e.g. due to electromagnetic interference on
the sensor cable.
Behavior as from firmware V1.0.1:
– Sporadic code sequence error leads to passivation of the channel, which must then be
– Safety input bit of the channel is reset to substitute value 0 until the channel is
– The resetting to the substitute value 0 takes place without any delay.
– Diagnostic alarm is triggered (after a short delay, in order to distinguish between
– Response to FW V1.0.0
– No message as diagnostic alarm in FW V1.0.0 and no passivation of the channel.
– Safety input bit of the channel is reset to substitute value 0 without a delay and
● Code sequence error (general)
Permanent interruption to code sequence, e.g. due to electromagnetic interference on the
sensor cable or code sequence corruption after replacement of the fail-safe input module.
Behavior (identical for firmware V1.0.0 and V1.0.1 or higher):
– Code sequence error leads to passivation of the channel, which must then be
– Safety input bit of the channel is reset to substitute value 0 until the channel is
– The reset to the substitute value 0 takes place without a delay, while the diagnostic
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reintegrated.
reintegrated.
sporadic code sequence errors and general code sequence errors).
automatically switches to the process value 0 or 1 if there is no interference to the
code sequence.
reintegrated.
reintegrated.
alarm is triggered after a short delay (delay necessary in order to distinguish between
sporadic code sequence errors and general code sequence errors).
Fail-safe Module F‑CM AS‑i Safety ST (3RK7136‑6SC00‑0BC1)
Manual, 03/2017, A5E03957059020A/RS-AB/002