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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.