1376 HEIDENHAIN Technical Manual MANUALplus 620
Module 9190 Start the PLC operating hours counter
The module activates one or more PLC operating hours counters. The control 
measures the time that elapses until activation is completed. Use Module 
9191 to cancel activation. Bits 0 to 7 of the transfer value represent the PLC 
operating hours counters 1 to 8. For every bit set, the associated counter is 
started. 
Call:
PS B/W/D/K <PLC operating time>
Bits 0 to 7 represent PLC operating times 1 to 8
CM 9190
Error recognition: 
Module 9191 Stop the PLC operating hours counter
The module stops one or more PLC operating hours counters. The time 
measured by the control is saved. Bits 0 to 7 of the transfer value represent 
the PLC operating hours counters 1 to 8. For every bit set, the associated 
counter is stopped.
Call:
PS B/W/D/K <PLC operating time>
Bits 0 to 7 represent PLC operating times 1 to 8
CM 9191
Error recognition: 
Marker Value Meaning
NN_GenApiModule
Error
0 PLC operating time started
1 Incorrect parameter
Marker Value Meaning
NN_GenApiModule
Error
0 PLC operating time stopped
1 Incorrect parameter