Message Buffer - Siemens Sinamics S110 Function Manual

Safety Integrated Functions
8.5 Extended Functions
8.5.8

Message buffer

In addition to the fault buffer for F... faults and the alarm buffer for A... alarms, a special
message buffer for C... safety messages is available for Safety Extended Functions.
The fault messages for the Safety Basic Functions are stored in the standard fault buffer
(see "Buffer for faults and alarms").
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 8-9
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 failsafe inputs F-DI or via PROFIsafe.
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Structure of the message buffer
Function Manual, 10/2008, 6SL3097-4AB10-0BP0
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