Siemens SINAMICS G120 Function Manual page 41

Table 2- 4
Extended Safety
You define the signal with which the inverter tests
its circuits for speed monitoring.
If you select the forced dormant error detection,
the inverter will check the circuits of both
Extended Safety and Basic Safety.
r9765 contains the remaining monitoring time.
The inverter signals that the monitoring time has
come to an end with alarm A01697.
During commissioning, you define the time interval for implementing forced dormant error
detection depending on your application.
If you only use "Basic Safety", you must take the following steps during commissioning:
● Parameterize the monitoring time p9659.
● Evaluate alarm A01699 in your higher-level controller, by, for example, interconnecting
The "Basic-Safety circuits" are an integral part of the "Extended-Safety circuits". If you use
"Extended-Safety", you must take the following steps during commissioning:
● Set the two monitoring times p9559 and p9659 to the same value.
● Evaluate alarm A01697 in your higher-level controller, by, for example, interconnecting
If alarm A01699 or A01697 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.
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).
Safety Integrated Function Manual, SINAMICS G120
Function Manual, 07/2010, FW 4.3.2, A5E03052391B AA
Triggering and monitoring the forced dormant error detection
r9773.31 with a digital output or a bit in the status word of the field bus.
r9723.01 with a digital output or a bit in the status word of the field bus.
2.10 Forced dormant error detection
Basic Safety
The inverter checks its circuits used to switch off
the torque if one of the following conditions
exists:
After the power supply has been connected

(Power ON Reset).
Each time after the STO.function has been

selected.
In the event of forced dormant error detection

of Extended Safety.
r9660 contains the remaining monitoring time.
The inverter signals that the monitoring time has
come to an end with alarm A01699.
Description
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