Specifications Of Input/Output Signals With Plc Cpu; List Of Input/Output Signals With Plc Cpu - Mitsubishi Electric MELSEC-LD77MS2 User Manual

3.3 Specifications of input/output signals with PLC CPU

3.3.1 List of input/output signals with PLC CPU

Signal direction: LD77MS2
Device No.
X0
X1
X2
X3
X4
X5
X6
X7
X8
X9
XA
XB
XC
XD
XE
XF
X10
X11
X12
X13
X14
X15
X16
X17
X18
X19
X1A
X1B
X1C
X1D
X1E
X1F
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 LD77MS2 will not be guaranteed.
The Simple Motion module 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 Simple Motion module 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 Simple Motion module to the PLC CPU,
and device Y refers to the signals output from the PLC CPU to the Simple Motion
module.
(1) LD77MS2
Signal name
READY
Synchronization flag
Use prohibited
Axis 1
M code ON
Axis 2
Use prohibited
Axis 1
Error detection
Axis 2
Use prohibited
Axis 1
Axis 2
Use prohibited
Axis 1
Start complete
Axis 2
Use prohibited
Axis 1
Positioning complete
Axis 2
Use prohibited
PLC CPU Signal direction: PLC CPU
Device No.
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Y9
YA
YB
YC
BUSY
YD
YE
YF
Y10
Y11
Y12
Y13
Y14
Y15
Y16
Y17
Y18
Y19
Y1A
Y1B
Y1C
Y1D
Y1E
Y1F
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Chapter 3 Specifications and Functions
Signal name
PLC READY
All axis servo ON
Use prohibited
Axis 1
Axis 2
Use prohibited
Forward run JOG start
Axis 1
Reverse run JOG start
Forward run JOG start
Axis 2
Reverse run JOG start
Use prohibited
Axis 1
Positioning start
Axis 2
Use prohibited
Axis 1
Execution prohibition flag
Axis 2
Use prohibited
LD77MS2
Axis stop