Forced Dormant Error Detection - Siemens SINAMICS S120 Function Manual

● p9326 SI motion encoder assignment (Motor Module)
● p9526 SI motion encoder assignment second channel
● p9342 SI motion actual value comparison tolerance (crosswise) (Motor Module)
● p9542 SI motion actual value comparison tolerance (crosswise) (Control Unit)
● p9349 SI motion slip velocity tolerance (Motor Module)
● p9549 SI motion slip velocity tolerance (Control Unit)
● r9713 SI motion diagnostics actual position (MAKSIP)
● r9724 SI motion crosswise comparison clock cycle
4.9

Forced dormant error detection

Forced dormant error detection and function test through test stop
The proper function of the two shutdown signal paths must be tested at least once within a
defined time in order to meet requirements as per EN 954-1 in terms of timely fault detection.
This functionality must be implemented by means of test stop triggering either in cyclic
manual mode or by the automated process.
The test stop cycle is monitored. On expiration of the programmed timer, 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.
The test stop must be initiated application-specific and be executed at a time which suits
application requirements. This functionality is implemented by means of a single-channel
parameter p9705 which can be wired via BICO either to an input terminal on the drive unit
(CU), or to an IO-PZD in the drive telegram.
● p9559 SI motion forced dormant error detection timer (Control Unit)
● p9705 BI: SI motion test stop signal source
● r9723.0 CO/BO: SI motion PROFIsafe diagnostics signals, dynamic response required
A test stop does not require POWER ON. The acknowledgment is set by canceling the test
stop request.
It can be assumed that a running machine will not pose any risk to personnel if appropriate
safety equipment (e.g. protective doors) is installed. For this reason, only an alarm is output
to inform the user that a forced dormant error detection run is due and to request that this be
carried out at the next available opportunity.
Examples of when to carry out forced dormant error detection:
● When the drives are at a standstill after the system has been switched on.
● Before the protective door is opened.
● At defined intervals (e.g. every 8 hours).
● In automatic mode (time and event dependent)
Safety Integrated
Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
Extended Functions
4.9 Forced dormant error detection
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