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MELSEC-Q
3 SPECIFICATIONS
3.2 I/O Signals for Programmable Controller CPU
This section explains the I/O signals of the QJ71MT91 for the programmable controller
CPU.
3.2.1 I/O signal list
The following table shows the I/O signals of the QJ71MT91.
The following I/O signal assignment is based on the case where the start I/O No. of the
QJ71MT91 is "0000" (installed to slot 0 of the main base unit).
Device X represents an input signal from the QJ71MT91 to the programmable
controller CPU.
Device Y shows an output signal from the programmable controller CPU to the
QJ71MT91.
Refer to the corresponding reference sections for details.
Signal Direction QJ71MT91 Programmable controller CPU
Signal Direction Programmable controller CPU QJ71MT91
Device
No.
Signal name
Reference
section
Device
No.
Signal name
Reference
section
X0
Module READY 1
ON : Accessible
OFF: Inaccessible
Section
11.1
Y0 Use
prohibited
X1
Basic parameter setting, normally
completed
ON : Normally completed
OFF:
Y1
Basic parameter setting request
ON : Being requested
OFF: Not requested
Section
9.1.1
X2
Basic parameter setting, error completed
ON : Error completed
OFF:
Y2
X3
Basic parameter setting existence
ON : Parameters set
OFF: No parameters set
Section
9.1.1
Y3
Use prohibited
X4
Automatic communication parameter
setting, normally completed
ON : Normally completed
OFF:
Y4
Automatic communication parameter
setting request/automatic communication
start request
ON : Parameter setting being
requested/start being requested
OFF : No parameter setting requested/no
start requested
Section
5.2.1,
9.1.2
X5
Automatic communication parameter
setting, error completed
ON : Error completed
OFF:
Y5 Use
prohibited
X6
Automatic communication operation status
ON : Operating
OFF: Stopped
Section
5.2.1,
9.1.2
Y6
Automatic communication stop request
ON : Being requested
OFF: Not requested
Section
5.2.1
X7
Automatic communication error status
ON : Error occurred
OFF: No error
Section
5.2.1
Y7 Use
prohibited
X8
MODBUS
R
device assignment parameter
setting, normally completed
ON : Normally completed
OFF:
Y8
MODBUS
R
device assignment parameter
setting request
ON : Being requested
OFF: Not requested
Section
9.1.3
X9
MODBUS
R
device assignment parameter
setting, error completed
ON : Error completed
OFF:
Section
9.1.3
Y9 Use
prohibited
1: Turns ON when the QJ71MT91 is ready after the programmable controller is turned ON
from OFF or after the programmable controller CPU is reset.
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