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MELSEC-Q
3 SPECIFICATIONS
Signal Direction QJ71MT91 Programmable controller CPU
Signal Direction Programmable controller CPU QJ71MT91
Device
No.
Signal name
Reference
section
Device
No.
Signal name
Reference
section
XA
MODBUS
R
device assignment
parameter setting existence
ON : Parameters set
OFF: No parameters set
Section
9.1.3
YA
XB
YB
XC
YC
XD
YD
XE
YE
XF
YF
X10
Y10
X11
Y11
X12
Y12
X13
Y13
X14
Y14
X15
Y15
X16
Y16
X17
Y17
X18
Y18
X19
Y19
X1A
Use prohibited
Y1A
Use prohibited
X1B
COM.ERR.LED status
ON : Lit
OFF: Not lit
Section
11.4.2
Y1B
COM. ERR. LED OFF request
ON : Being requested
OFF: Not requested
Section
11.4.2
X1C
PING test completed
ON : PING test completed
OFF:
Section
11.5.2
Y1C
PING test execution request
ON : PING test execution being
requested
OFF: PING test execution not request
Section
11.5.2
X1D
Y1D
X1E
Use prohibited
Y1E
X1F
Watch dog timer error
ON : Module error occurred
OFF: Module operating normally
Section
11.1
Y1F
Use prohibited
Important
Among the I/O signals for the programmable controller CPU, do not output (turn
ON) the "Use prohibited" signals.
Doing so may cause the programmable controller system malfunction.