Test Stop; Test Stop Modes Of The Tm54F - Siemens SINAMICS S120 Function Manual

Commissioning
7.3 Commissioning TM54F by means of STARTER/SCOUT
7.3.4

Test stop

7.3.4.1

Test stop modes of the TM54F

Testing the fail-safe inputs and outputs
Fail-safe I/O must be tested at defined intervals in order to validate their fail-safety (test stop,
or forced dormant error detection). The TM54F module is provided with a function block
which is selected by means of a BICO source to execute this forced dormant error detection
(e.g. switch the L1+ and L2+ sensor power supply). Each selection triggers a timer in order
to monitor the test cycle. An alarm is set on expiration of the monitored time.
Three test stop modes can be selected using the TM54F safety module. After a time interval
has expired, the user is notified using an alarm that a test stop must be performed for the
F-DI/DO of the TM54F. The various test stop modes and the required test sequences are
described in the following.
Preparing to perform a test stop
Before the parameterizing and configuring point in time, the circuit used for the F-DO of the
TM54F for the selected test stop mode must be derived and correspondingly parameterized.
After the forced dormant error detection interval timer has expired, an alarm notifies the user
that a test stop must be performed for the F-DI/DO of the TM54F.
The test stop should be started e.g. using a control signal or a switch using a signal
interconnected with BICO.
The alarm is only cleared once the test stop has been performed.
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Function Manual, (FHS), 11/2009, 6SL3097-4AR00-0BP0
Safety Integrated