Forced Dormant Error Detection (Test Stop) Of The Tm54F - Siemens Sinamics S120 Function Manual

6.9.7

Forced dormant error detection (test stop) of the TM54F

Testing fail-safe inputs and outputs
Fail-safe inputs and outputs must be tested for fail-safety at defined time intervals (forced
dormant error detection (test stop)). The TM54F contains a function block that runs this
forced dormant error detection (test stop) in the following cases:
● When selected via a BICO source
● Automatically, each time the power supply voltage is switched on (POWER ON)
To monitor the time until the next required test, a timer (p10003) is started after every error-
free forced dormant error detection (test stop). The message A35014 "TM54F test stop
necessary" is set on expiration of the monitored time and each time the Control Unit is
switched on.
The fail-safe digital inputs can be selected for forced dormant error detection (test stop) 3
modes can be selected for testing the output (see following chapter).
When the appropriate safety devices are implemented (e.g. protective doors), it can be
assumed that running machinery will not pose any risk to personnel. The user is therefore
only informed that forced dormant error detection (test stop) is due by an alarm, which
requests the user to perform forced dormant error detection (test stop) at the next possible
opportunity.
Examples of when forced dormant error detection (test stop) must be performed:
● When the drives are at a standstill after the system has been switched on
● Before opening the protective door
● At defined intervals (e.g. every 8 hours)
● In the automatic mode, time and event-dependent
● Automatically, each time the power supply voltage is switched on (POWER ON)
Ex ecution
When parameterizing, proceed as follows:
1. Derive the suitable mode from the circuit used in your application (see figures in the
following chapters).
2. Set the mode which is to be used via parameter p10047.
3. Use parameter p10046 to define which digital outputs (F-DO 0 to F-DO 3) are to be
tested. Note the following:
Digital outputs that are not tested are shut down during forced dormant error detection
(test stop).
4. Use parameter p10041 to define which fail-safe digital inputs are to be checked during
the test.
Inputs which do not have L1+ and L2+ power supplies may not be selected for the test.
It is only possible to test the sensors connected to the F-DIs, if these are supplied from
L1+ or L2+. If F-DOs of preprocessing devices are connected, forced dormant error
detection (test stop) cannot be used for this input.
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
6.9 Commissioning TM54F by means of STARTER/SCOUT
Commissioning
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