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

Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
"Safe gearbox switchover" and referencing
The gearbox stage switchover means that the reference position and the user agreement are
lost. This means that after a gearbox switchover, initial referencing is required, to return to
the "safely referenced" state (see Chapter "Safe referencing (Page 127)").
Ov erview of important parameters (see SINAMICS S120/S150 List Manual)
• p9501.26
• p9521[0...7]
• p9522[0...7]
• p9539[0...7]
• p9542
• p9543
• p9549
• r9720.0...27
4.2.20

Forced dormant error detection (test stop)

Forced dormant error detection (test s top) 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 forced dormant error detection (test stop) for Basic
and Extended Functions is 8760 hours; i.e. forced dormant error detection (test stop) must
be performed at least once per year.
This functionality must be implemented by initiating forced dormant error detection (test stop)
cyclically either manually or as part of an automated process.
The test stop cycle is monitored. On expiration of the parameterized timer (also after
POWER ON / warm restart), the 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.
160
SI Motion enable safety functions (Control Unit): Enable reliable gearbox
switchover
SI Motion gearbox encoder (motor)/load denominator (Control Unit)
SI Motion gearbox encoder (motor)/load numerator (Control Unit)
SI Motion gearbox direction of rotation reversal (Control Unit)
SI Motion actual value comparison tolerance (crosswise) (Control Unit)
SI Motion gearbox switching position tolerance factor (CU)
SI Motion slip velocity tolerance (Control Unit)
CO/BO: SI Motion drive-integrated control signals
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated