Forced Checking Procedure (Test Stop) - Siemens SINAMICS S120 Function Manual

4.3.7

Forced checking procedure (test stop)

Forced checking procedure (test stop) and function test
The functions and switch-off signal paths must be tested at least once within a defined
period to establish whether they are working properly in order to meet the requirements of
EN ISO 13849-1 and IEC 61508 in terms of timely error detection.
The maximum permissible interval for the forced checking procedure (test stop) for Basic
and Extended/Advanced Functions is 8760 hours; i.e. the forced checking procedure (test
stop) must be performed at least once per year.
This functionality must be implemented by initiating forced checking procedure (test stop)
cyclically either manually or as part of an automated process.
The test stop cycle is monitored. When the parameterized timer expires (also after POWER
ON / warm restart), alarm A01697: "SI Motion: Test of motion monitoring required" is
generated and a status bit is set which can be transferred to an output or to a PZD bit via
BICO. This alarm does not affect machine operation.
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Description of Safety Integrated functions
4.3 Safety Integrated Advanced Functions
195