Siemens SINAMICS S120 Function Manual page 573

Regulations from EN 60204-1
The Emergency Stop function must bring the machine to a standstill according to stop
category 0 or 1 (STO or SS1).
The machine must not restart automatically after EMERGENCY STOP.
When individual safety functions (Extended Functions) are deactivated, an automatic
restart is permitted under certain circumstances depending on the risk analysis (except
when Emergency Stop is reset). An automatic start is permitted when a protective door is
closed, for example.
System power-up and drive activation after changing or replacing hardware and/or software
After hardware and/or software components have been modified or replaced, it is only
permissible for the system to run up and the drives to be activated with the protective
devices closed. Personnel shall not be present within the danger zone.
It may be necessary to carry out a partial or complete acceptance test or a simplified
functional test (see Section "Acceptance test") after having made certain changes or
replacements.
Before personnel may re-enter the hazardous area, the drives should be tested to ensure
that they exhibit stable control behavior by briefly moving them in both the plus and minus
directions (+/–).
Please note the following during switch-on:
The Safety Integrated functions are only available and can only be selected after the
system has completely powered up.
Parameterization for single-encoder system
For a single-encoder system, encoder faults are detected using different hardware and
software monitoring functions. It is not permissible to disable these monitoring functions
(i.e. the encoder monitoring in the Sensor Module) and they must be parameterized
carefully. Depending on the fault type and the responding monitoring function, stop function
category 0 or 1 in accordance with EN 60204-1 (fault response functions STOP A or
STOP B to Safety Integrated) is selected (see table "Overview of stop responses" in
Section "Safety Integrated Extended Functions", in the section "Safety faults").
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
WARNING
WARNING
WARNING
Safety Integrated basic functions
9.3 Safety instructions
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