Mitsubishi Electric QJ71DN91, User Manual

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MELSEC-Q
3 SPECIFICATIONS
(4) Error Set Signal for Master Function (X03), Error Reset Request for
Master Function (Y13)
These signals are used for notification of an error occurred during master
function execution and for error code resetting.
(a) When a master function error occurs, the error information is stored in Error
Information for Master Function (address: 01B1
H
), and Error Set Signal for
Master Function (X03) is set to on.
When the error is corrected, Error Set Signal for Master Function is set to
off. (While I/O communication is stopped, however, it is not set to off.)
(b) After the error is removed, setting Error Reset Request for Master Function
(Y13) to on clears the error code in Error Information for Master Function
(address: 01B1
H
).
Error Reset Request for
Master Function (Y13)
Error Set Signal for
Master Function (X03)
OFF OFF
OFF OFF
ON
ON
Error Information for
Master Function (01B1
H
)
(MOV/FROM instruction)
Error code
cleared
(5) Slave Down Signal (X04)
This signal indicates whether or not there is a slave node that is in I/O
communication stop status (a failed node).
(a) If any one of the slave nodes that are set by parameters is detected as a
failed node, this signal is set to on.
OFF: All nodes communicating normally
ON: Faulty node exists
(b) Slave Down Signal (X04) is set to off when communication with the failed
node resumes.
POINT
(1) The I/O communication status of each slave node can be confirmed at Node
Communication Status (address: 01BC
H
to 01BF
H
).
(2) Reserved nodes are recognized as failed nodes.
To prevent a reserved node from being detected as a failed node, turn on the
corresponding bit in Failed Node Detection Setting (address: 01CC
H
to 01CF
H
).