Safety Integrated Functions in
SINAMICS Drive Systems
6.4 Safety status displays and error messages
Connection of the SINAMICS S120 to the Technology CPU
Product Information, 09/2011, A5E00480378-04
197
Safety message buffer in the SINAMICS S120 drive
Errors in the safety function in the drive itself or stop responses initiated by monitoring
functions will be displayed in the drive using a safety fault. The safety faults are stored in the
safety message buffer.
Table 6- 2 Structure of the safety message buffer
Parameter Meaning
r9744 Message buffer change count
r9747 [0…63] Message code
r9748 [0…63] Message time arrived in ms
r9749 [0…63] Additional information
r9752 Messages counter
r9754 [0…63] Message time arrived in days
r9755 [0…63] Message time sent in ms
r9756 [0…63] Message time sent in days
Safety faults can only be acknowledged fail-safe:
● By a fail-safe CPU via the PROFIsafe-Signal Internal_Event_Acknowledge bit 7
of the PROFIsafe control word
or
● via a terminal on the TM54F
An entry in the safety message buffer is displayed with bit 15, Internal_Event, in
StatuswordSafety in the TO DB of the axis. If this bit is set, error ID 8140 will be displayed in
the TO DB of the axis.
The cause of the fault can be read by the user program from the p9744-p9756
drive parameters.
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