Forced Dormant Error Detection; Password - Siemens SINAMICS G120 Operating Instructions Manual

Functions
8.10 Fail-safe function Safe Torque Off (STO)
8.10.5

Forced dormant error detection

To fulfill the requirements of standards EN 954-1, ISO 13849-1 and IEC 61508 regarding
timely error detection, the inverter must regularly test its safety-relevant circuits to ensure
that they function correctly - this must be performed at least once every year.
After the power supply has been connected, the inverter checks its circuits to switch-off the
torque each time the STO function is selected.
The inverter monitors the regular test of its safety-relevant circuits using a time module.
Figure 8-29
r9660 contains the remaining time until the monitoring responds. The inverter signals Alarm
A01699 after the monitoring time expires.
You define the monitoring time while commissioning the system depending on your particular
application.
Examples for the times when forced dormant error detection is performed:
● 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).
If alarm A01699 signals that the monitoring time has expired, then you must initiate the
forced dormant error detection at the next opportunity. These alarms do not affect the
operation of your machine.
8.10.6

Password

The safety functions are protected against unauthorized changes by a password.
Note
If you want to change the parameters of the safety functions, but do not know the password,
please contact customer support.
The factory setting for the password is "0". During commissioning, choose your password
from the permissible range 1 ... FFFF FFFF.
234
Forced dormant error detection monitoring
Operating Instructions, 01/2011, FW 4.4, A5E02999804A AB
SINAMICS G120C Inverter