Fail Safe States - YASKAWA iC9200 Series Operating Manual

Deployment CPU iC921xM-FSoE

Fail safe states

Operating temperature
Warning limits
Error limit
5.11 Fail safe states
Behavior on error
130
Horizontal hanging or vertical hanging the CPU has the following temperature ranges:
■
Horizontal hanging: 0°C to 60°C
■
Vertikal hanging: 0°C to 55°C
If the temperature falls below -2°C or exceeds 78°C, a warning message is added to the
error stack and the log file of the safety CPU.
If the temperature falls below -7°C or exceeds 83°C, the safety CPU switches to the Hard
fail safe state. ⮫ 'Fail safe states'...page 130
All detected, serious errors in the CPU that could lead to loss or malfunction of the
programmed safety function result in a transition to the safety state (fail safe state). A
distinction is made between Soft fail safe and Hard fail safe states. Here the CPU shows
different behavior:
■
State Soft fail safe
Behavior
–
The safety outputs of the F devices are set to zero (FALSE).
–
The red SF_ER LED blinks with 1Hz.
–
If you are connected online to the iCube Engineer on error, information about the
error is also shown in the software.
Possible reason
–
Error in parametrization
Acknowledgement
–
Bug fixing in the project and new upload.
■
State Hard fail safe
Behavior
–
The safety outputs of the F devices are set to zero (FALSE).
–
The red SF_ER LED is on.
–
Communication with the CPU is no longer possible.
Possible reason
–
Hardware error, exceeding the switch-off thresholds of the temperature limits.
Acknowledgement
–
Check your hardware setup and perform a power cycle.
HB700 | CPU | PMC921xEx | en | 24-04
iC9200 Series