Message Buffer - Siemens SINAMICS S120 Function Manual

Safety Integrated Extended Functions

5.11 Message buffer

5.11 Message buffer
In addition to the fault buffer for F... faults and the alarm buffer for A... alarms (see the
corresponding chapter in: /IH1/ SINAMICS S120 Commissioning Manual), specifically for
Safety Integrated Extended Functions, there is also a message buffer for C... safety
messages.
The fault messages for the Safety Integrated Basic Functions are stored in the standard fault
buffer (see chapter "Buffer for faults and alarms" in /IH1/: SINAMICS S120 Commissioning
Manual).
The message buffer for safety messages is similar to the fault buffer for fault messages.
The message buffer comprises the message code, message value, and message time
(received/resolved). The following diagram shows how the message buffer is structured:
Figure 5-10
When a safety message is present, the bit 2139.5 = 1 ("Safety message present") is set.
The entry in the message buffer is delayed. For this reason, the message buffer should not
be read until a change in the buffer (r9744) has been detected after "Safety message
present" is output.
The messages must be acknowledged via the fail-safe inputs F-DI of the TM54F or via
PROFIsafe.
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Structure of the message buffer
Function Manual, (FHS), 11/2009, 6SL3097-4AR00-0BP0
Safety Integrated