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Chapter 3 Specifications and Functions
3.3 Specifications of input/output signals with PLC CPU
3.3.1 List of input/output signals with PLC CPU
The QD77MS uses 32 input points and 32 output points for exchanging data with the
PLC CPU.
The input/output signals when the head I/O number of QD77MS is set to "0H" are
shown below.
If it is set to other than "0H", change the I/O number according to setting of head I/O
number.
Device X refers to the signals input from the QD77MS to the PLC CPU, and device Y
refers to the signals output from the PLC CPU to the QD77MS.
(1) QD77MS2
Signal direction: QD77MS2 PLC CPU
Signal direction: PLC CPU QD77MS2
Device No.
Signal name
Device No.
Signal name
X0
QD77 READY
Y0
PLC READY
X1
Synchronization flag
Y1
All axis servo ON
X2 Y2
X3
Use prohibited
Y3
Use prohibited
X4 Axis
1
Y4 Axis
1
X5 Axis
2
M code ON
Y5 Axis
2
Axis stop
X6 Y6
X7
Use prohibited
Y7
Use prohibited
X8
Axis 1
Y8
Forward run JOG start
X9 Axis
2
Error detection
Y9
Axis 1
Reverse run JOG start
XA
YA
Forward run JOG start
XB
Use prohibited
YB
Axis 2
Reverse run JOG start
XC Axis
1
YC
XD Axis
2
BUSY
YD
XE YE
XF
Use prohibited
YF
Use prohibited
X10 Axis
1
Y10 Axis
1
X11 Axis
2
Start complete
Y11 Axis
2
Positioning start
X12 Y12
X13
Use prohibited
Y13
Use prohibited
X14 Axis
1
Y14 Axis
1
X15 Axis
2
Positioning complete
Y15 Axis
2
Execution prohibition flag
X16 Y16
X17 Y17
X18 Y18
X19 Y19
X1A Y1A
X1B Y1B
X1C Y1C
X1D Y1D
X1E Y1E
X1F
Use prohibited
Y1F
Use prohibited
Important
[Y2, Y3], [Y6, Y7], [YC to YF], [Y12, Y13], [Y18 to Y1F], [X2, X3], [X6, X7], [XA, XB], [XE,
YF], [X12, X13], and [X16 to X1F] are used by the system, and cannot be used by the user.
If these devices are used, the operation of the QD77MS2 will not be guaranteed.
Содержание MELSEC-Q QD77MS
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