
B-64004EN/02 3.SAFETY FUNCTIONS
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3.15 CPU SELF TEST FUNCTION
The CNC, the PMC, the SV and the SP carry out the following
self-diagnosis. If the error is detected, the alarm is generated and sets
MCC Off signal (*DCALM) to “0”.
<1> CPU check
It is checked whether each CPU runs normally or not.
It is checked whether the instructions related to safety function is
executed normally or not.
Error detected CPU ALARM
CNC PW0014
PMC PW0009
SV SV0484
SP SP9074(Spindle alarm 74)
<2> Program monitoring
It is confirmed whether all safety related function run normally.
Error detected CPU ALARM
CNC PW0017 / SV0490
PMC PW0008(DCS PMC) PW0009(PMC)
SV SV0484
SP SP9076 (Spindle alarm 76)
SP0755
<3> Cross check
It is checked whether the result of the judgment about the safety
related function of a CPU is consistent with that of another CPU.
If some error is found, an alarm is output.
ALARM
SV relation SV0490/SV0484
SP relation SP9072(Spindle alarm 72)
SP9077(Spindle alarm 77)
SP9078(Spindle alarm 78)
SP0755
PMC relation PW0008(DCS PMC) PW0009(PMC)