
5.I/O SIGNALS B-63494EN/02
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MCC-on enable signal
MCF1 <F191#1>,MCF2 <DO+000#1>
[Classification] Output signal
[Function] This signal posts notification that the MCC can be turned on with the
dual check safety function.
When either of the MCC on-enable signals (MCF1 and MCF2) is 0,
the MCC is turned on. When both MCF1 and MCF2 are 1, the MCC is
tuned on.
[Output condition] In the following cases, this signal is set to 0 (to prevent the MCC from
being turned on):
• When a safety-related alarm is issued
• When the emergency stop state is issued
In cases other than above, this signal is state to 1 (to enable the MCC
to be turned on).
MCC off Test execution request signal
RQT <F191#2>
[Classification] Output signal
[Function] This signal requests that MCC off Test mode be set, and a check is
made to determine whether the safety output signals (MCC-on enable
signal (MCF)) operate normally. When MCC off Test execution
request signal (RQT) is set to 1, set MCC off Test mode and conduct a
safety output signal MCC off Test as soon as possible.
When MCC off Test execution request signal (RQT) is 1, guard
unlock signal (*LGD to *LGD4) is set to 0 to disable guard unlocking
even if safety signal mode B (state in which a guard open request is
input, and the guard is closed) is set and the conditions including
speed are satisfied.
When safety signal mode C (state where a guard open request is input,
and the guard is open) is set, and MCC off Test execution request
signal (RQT) is set to 1, guard unlock signal (*LGD to *LGD4) is 0 to
disable guard unlocking until MCC off Test execution request signal
(RQT) is set to 0 after the guard is closed once.
When MCC off Test execution request signal (RQT) is 1, the warning
"PLEASE EXECUTE SAFE TEST" is displayed on a screen such as a
parameter screen. (On some screens, no warning is displayed.)
MCC off Test execution request signal (RQT) is not output via the
FSSB.
[Output condition] In the following cases, this signal is set to 1:
• A MCC off Test is not completed after power-on (when bit 3 of
parameter No. 1902 is 0).
• Twenty-four hours have elapsed since the completion of the last
MCC off Test.