Test Stop / Forced Dormant Error Detection - Siemens SINAMICS S120 Function Manual

Safety Integrated basic functions
10.2 General information
If you need to change Safety parameters but you do not know the Safety password, proceed
as follows:
1. Set the entire drive unit (Control Unit with all connected drives/components) to the factory
setting.
2. Recommission the drive unit and drives.
3. Recommission Safety Integrated.
Or contact your regional Siemens office and ask for the password to be deleted (complete
drive project must be made available).
Overview of important parameters for "Password" (see SINAMICS S120/S150 List Manual)
• p9761
• p9762
• p9763
10.2.5

Test stop / forced dormant error detection

Forced dormant error detection or test of the switch-off signal paths (test stop) for Safety Integrated
Basic Functions
The forced dormant error detection function at the switch-off signal paths is used to detect
software/hardware faults at both monitoring channels in time and is automated by means of
activation/deactivation of the "Safe Torque Off" (STO) or "Safe Stop 1" (SS1) function.
To fulfill the requirements of ISO 13849-1 regarding timely error detection, the two switch-off
signal paths must be tested at least once within a defined time to ensure that they are
functioning properly. This functionality must be implemented by means of forced dormant
error detection, triggered either in manual mode or by the automated process.
A timer ensures that forced dormant error detection is carried out as quickly as possible.
● p9659 SI timer for the forced dormant error detection.
Forced dormant error detection must be carried out at least once during the time set in this
parameter.
Once this time has elapsed, an alarm is output and remains present until forced dormant
error detection is carried out.
The timer returns to the set value each time the STO/SS1 function is deactivated.
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. For this reason, an
alarm is only 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. This alarm does not affect
machine operation.
The user must set the time interval for carrying out forced dormant error detection to
between 0.00 and 9000.00 hours depending on the application (factory setting: 8.00 hours).
586
SI password input
SI password new
SI password acknowledgement
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions