Siemens SIMATIC S7 F Manual page 323

Fail-Safe Blocks
Safety Mode Activated/Deactivated Events Reported From Shutdown Logic
Error Code (W#16#...) Cause
That Safety Mode was activated. That
73DBH
means all the safety mechanisms for
fault detection and fault reactions are
activated.
The Safety Mode is deactivated. The
72DBH
safety of the system must be ensured by
means of other organizational measures
(e.g. monitored operation and
manualsafety shutdown).
Shutdown of Failsafe Runtime Group Activated – Reported from Shutdown Logic F_SHUTDN
Error Code (W#16#...) Cause
75DDH A Fail-safe run-time Group has detected
a critical fault and will be disabled. The
RTG_LOGIC identified by DBxx is the
Data Block number of the F-FB which
detected the fault. The RTG_LOGIC FBs
are in the CFC chart @F_ShutDn. The
number at the end of the RTG_LOGIC
FB's Name is the instance DB number,
finding the F-FB with the DB xx reported
in event will lead to discovering the Run-
time Group Name and chart location.
Identify the cause of the shutdown and
resolve the issue. You may restart all of
the shutdown F-run-time Groups through
the RESTART input of the FB
F_SHUTDN located in the CFC chart
@F_ShutDn.
Shutdown of Failsafe Runtime Group Deactivated – Reported from Shutdown Logic F_SHUTDN
74DDH The RTG_LOGIC identified by DBxx has
re-enabled it's Fail-safe run-time Group.
A Fault was cleared following a
initialization of the F-run-time Group. This
would happen after the User causes a 0 -
> 1 transition on the RESTART input of
the FB F_SHUTDN located in the CFC
chart @F_ShutDn
Fail-Safe Systems
A5E00085588-03
Remedies
Remedies
•
Identify the failure in the F-run-
time Group.
-and-
•
Restart the Shutdown logic.
-or-
•
Stop and ColdStart F-CPU.
-or-
•
Full Download of the complete
program to F-CPU.
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