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Chapter 3 Specifications and Functions
(2) QD77MS4
Signal direction: QD77MS4 PLC CPU Signal direction: PLC CPU QD77MS4
Device No. Signal name Device No. Signal name
X0 READY Y0 PLC READY
X1 Synchronization flag Y1 All axis servo ON
X2
Use prohibited
Y2
Use prohibited
X3 Y3
X4 Axis 1
M code ON
Y4 Axis 1
Axis stop
X5 Axis 2 Y5 Axis 2
X6 Axis 3 Y6 Axis 3
X7 Axis 4 Y7 Axis 4
X8 Axis 1
Error detection
Y8
Axis 1
Forward run JOG start
X9 Axis 2 Y9 Reverse run JOG start
XA Axis 3 YA
Axis 2
Forward run JOG start
XB Axis 4 YB Reverse run JOG start
XC Axis 1
BUSY
YC
Axis 3
Forward run JOG start
XD Axis 2 YD Reverse run JOG start
XE Axis 3 YE
Axis 4
Forward run JOG start
XF Axis 4 YF Reverse run JOG start
X10 Axis 1
Start complete
Y10 Axis 1
Positioning start
X11 Axis 2 Y11 Axis 2
X12 Axis 3 Y12 Axis 3
X13 Axis 4 Y13 Axis 4
X14 Axis 1
Positioning complete
Y14 Axis 1
Execution prohibition flag
X15 Axis 2 Y15 Axis 2
X16 Axis 3 Y16 Axis 3
X17 Axis 4 Y17 Axis 4
X18
Use prohibited
Y18
Use prohibited
X19 Y19
X1A Y1A
X1B Y1B
X1C Y1C
X1D Y1D
X1E Y1E
X1F Y1F
Important
[Y2, Y3], [Y18 to Y1F], [X2, X3], and [X18 to X1F] are used by the system, and cannot be
used by the user.
If these devices are used, the operation of the QD77MS4 will not be guaranteed.