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MELSEC-Q
3 SPECIFICATIONS
(b) When starting I/O communication automatically at power-up
Set "Start" in Automatic Communication Start Setting (address: 0631
H
).
• When power is turned on, Module Ready (X0F) is set to on and
parameters are checked.
• If the parameter check is completed successfully, I/O communication with
each slave node is started and I/O Communicating (X01) is set to on.
• If the parameter check has failed, the ERR. LED lights up and Error Set
Signal for Master Function (X03) is set to on. At this time, I/O
Communicating (X01) is not set to on.
For details of Error Set Signal for Master Function (X03), refer to Section
(4).
• Setting I/O Communication Request (Y11) to on and then off stops I/O
communication with each slave node, causing I/O Communicating (X01)
to turn off.
When parameter check completed successfully
Module Ready (X0F)
I/O Communicating
(X01)
OFF
OFF
ON
ON
Parameter
check
When parameter check failed
Module Ready (X0F)
I/O Communicating
(X01)
OFF
OFF
OFF
ON
ON
Error Set Signal for
Master Function (X03)
Parameter
check
Summary of Contents for QJ71DN91
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