Siemens PC 670 - Manual (Page 141)

Hardware Information Release 04/02
7-9 Panel PC 670 Computing Unit, Equipment Manual
7.4.5 Fan monitoring
The operation of the processor fan is monitored. If the fan should fail, the following
reactions are triggered:
Reaction Options
Temp LED from GREEN to RED –
Trigger IRQ Adjustable
The error remains saved until the cause of the failed fan is removed and the
temperature error is reset by one of the following measures.
S Acknowledgement of the error message via the SOM program.
S
Restarting the device.