I/O Signals For The Slave Function - Mitsubishi Electric QJ71DN91 User Manual

3 SPECIFICATIONS

3.3.3 I/O signals for the slave function

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This section describes the on/off timings and conditions of the I/O signals used for the
slave function.
(1) Watchdog Timer Error (X00)
Refer to Section 3.3.2 (1).
(2) I/O Communicating (X01), I/O Communication Request (Y11)
These are used to start I/O communication with a master node.
Execute these signal actions while Module Ready (X0F) is on.
(a) When starting I/O communication by I/O Communication Request (Y11)
• When I/O Communication Request (Y11) is set to on, parameters are
checked.
• If the parameter check is completed successfully, I/O communication with
the master node is started and I/O Communicating (X01) is set to on.
Note that, until receiving an I/O communication request from the master
node, the module waits for connection establishment.
• If the parameter check has failed, the ERR. LED lights up and Error Set
Signal for Slave Function (X08) is set to on. At this time, I/O
Communicating (X01) is not set to on.
For details of Error Set Signal for Slave Function (X08), refer to Section
(4).
• Setting I/O Communication Request (Y11) to off stops I/O communication
with the master node, causing I/O Communicating (X01) to turn off.
When parameter check completed successfully
Module Ready (X0F)
I/O Communication
Request (Y11)
I/O Communicating
(X01)
ON
OFF
ON
OFF
OFF
Parameter
check
MELSEC-Q
OFF
ON
OFF
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