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3
SPECIFICATIONS
3.2 I/O Signals for Programmable Controller CPU
3.2.1 I/O signal list
Signal Direction QJ71MT91 → Programmable controller CPU
Device
No.
Module READY
X0
ON : Accessible
OFF: Inaccessible
Basic parameter setting, normally
completed
X1
ON : Normally completed
OFF:
Basic parameter setting, error completed
X2
ON : Error completed
OFF:
Basic parameter setting existence
X3
ON : Parameters set
OFF: No parameters set
Automatic communication parameter
setting, normally completed
X4
ON : Normally completed
OFF:
Automatic communication parameter
setting, error completed
X5
ON : Error completed
OFF:
Automatic communication operation status
X6
ON : Operating
OFF: Stopped
Automatic communication error status
X7
ON : Error occurred
OFF: No error
MODBUS device assignment parameter
setting, normally completed
X8
ON : Normally completed
OFF:
MODBUS device assignment parameter
setting, error completed
X9
ON : Error completed
OFF:
3 - 3
This section explains the I/O signals of the QJ71MT91 for the programmable controller
CPU.
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 name
1
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.
Signal Direction Programmable controller CPU → QJ71MT91
Reference
Device
section
No.
Section
Y0
Use prohibited
11.1
Basic parameter setting request
Y1
ON : Being requested
OFF: Not requested
Section
9.1.1
Y2
Use prohibited
Y3
Automatic communication parameter
setting request/automatic communication
start request
Y4
ON : Parameter setting being
OFF : No parameter setting requested/no
Section
5.2.1,
9.1.2
Y5
Use prohibited
Automatic communication stop request
Y6
ON : Being requested
OFF: Not requested
Section
Y7
Use prohibited
5.2.1
MODBUS device assignment parameter
setting request
Y8
ON : Being requested
OFF: Not requested
Section
9.1.3
Y9
Use prohibited
MELSEC-Q
Signal name
requested/start being requested
start requested
(Continued on next page)
Reference
section
Section
9.1.1
Section
5.2.1,
9.1.2
Section
5.2.1
Section
9.1.3
3 - 3
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