Siemens SIMATIC S7-300 Product Information page 197

SINAMICS Drive Systems
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
Parameter
r9744
r9747 [0...63]
r9748 [0...63]
r9749 [0...63]
r9752
r9754 [0...63]
r9755 [0...63]
r9756 [0...63]
Safety faults can only be acknowledged fail-safe:
● By a fail-safe CPU via the PROFIsafe-Signal Internal_Event_Acknowledge bit 7
● 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.
Connection of the SINAMICS S120 to the Technology CPU
Product Information, 09/2011, A5E00480378-04
Structure of the safety message buffer
Meaning
Message buffer change count
Message code
Message time arrived in ms
Additional information
Messages counter
Message time arrived in days
Message time sent in ms
Message time sent in days
of the PROFIsafe control word
or
Safety Integrated Functions in
6.4 Safety status displays and error messages
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