Efficient Networks S120 manual Forced dormant error detection

Safety Integrated basic functions

9.1General information

●p10062 SI password new TM54F

●p10063 SI password acknowledgement TM54F

9.1.4Forced dormant error detection

Forced dormant error detection or test for the switch-off signal paths

Forced dormant error detection for the switch-off signal paths is used for detecting errors in the software/hardware of the two monitoring channels as quickly as possible and is carried out automatically when the "Safe Torque Off" function is activated/deactivated.

To fulfill the requirements of EN 954-1 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. For this purpose, forced dormant error detection must be triggered manually or is automatically initiated by the 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 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, only an alarm is output to inform the user that a forced dormant error detection run is due and 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).

When to carry out forced dormant error detection:

●When the drives are at a standstill after the system has been switched on.

●When the protective door is opened.

●At defined intervals (e.g. every 8 hours).

●In automatic mode (time and event dependent)

NOTICE

If, while the Extended Functions are used, the associated forced dormant error detection is performed, the time of the Basic Functions will also be reset. The respective alarm of the Basic Functions is not generated.

While STO is selected through the Extended Functions, the terminals for the selection of the Basic Functions are not checked for any discrepancy. This means that the test stop of the Basic Functions must always be performed without the simultaneous selection of STO or SS1 by the Extended Functions. Otherwise it is impossible to check the correct control through the terminals.

306	Drive Functions
	Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4