Acknowledging Safety Faults - Siemens SINAMICS S120 Function Manual

9.3.3

Acknowledging safety faults

Note
Acknowledgment through Power Off/On
Safety faults can also be acknowledged (as with all other faults) by switching the drive unit
off and then on again (POWER ON).
If this action has not removed the fault cause, the fault is displayed again immediately after
ramp-up.
Acknowledgment via TM54F/CU310-2
Parameter p10006 "SI acknowledgement internal event input terminal" allows faults to be
acknowledged in the following objects:
● Safety drives
● The TM54F F-DI
● CU310-2
The "safe fault acknowledgment" mechanism functions as follows:
The F-DI on the TM54F or on the CU310-2 that was parameterized with the function p10006
"Safety Integrated acknowledgment internal event input terminal", is activated. In this way,
faults that have occurred on the drives or on the TM54F are acknowledged using a safe
input signal. The falling edge at this input resets the status "Internal Event" in the drives and,
if used, in the TM54F or the CU310-2.
To prevent safety faults from being acknowledged unintentionally or incorrectly, the signal at
the F-DI terminal, which was parameterized for acknowledgment purposes, must be at level
"0" in the quiescent state. To trigger the acknowledgment (negative edge at F-DI), first set
the signal to "1" and then back to "0". If the required idle state is not reached, an alarm is
output.
After "safe fault acknowledgment", when using a TM54F, an acknowledgment must be made
at the Control Unit. This acknowledgement has the following effect:
● TM54F faults are deleted from the fault buffer.
● The red Ready LED on the TM54F is reset.
Acknowledgment via PROFIsafe
The higher-level controller sets the signal "Internal Event ACK" via the PROFIsafe telegram
(STW bit 7) separately for each drive object. A falling edge in this signal resets the status
"Internal Event" in the relevant drive, which therefore acknowledges the fault.
Faults in the drive objects (DOs) cannot be acknowledged by the higher-level controller in
the line-up but must instead be acknowledged separately for each individual drive object.
Extended acknowledgment
If STO or SS1 is selected/deselected (and p9507.0 = 1 are set), then the safety messages
are canceled automatically.
If, in addition to the "Basic Functions via terminals", the "Extended/Advanced Functions" are
also enabled, then acknowledgment is also possible by selecting/deselecting STO via
PROFIsafe or terminals at the TM54F or at the CU310-2.
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Maintenance
9.3 Safety faults
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