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1 PRODUCT OUTLINE
1.1.5 Communicating signals between QD75 and each module
The outline of the signal communication between the QD75 and PLC CPU, peripheral
device and drive unit, etc., is shown below.
(A peripheral device communicates with the QD75 via the PLC CPU to which it is
connected)
PLC
CPU
PLC READY signal
Y0
QD75 READY signal
X0
Syncronization flag
X1
Forward run JOG start signal
Y8,YA,YC,YE
Reverse run JOG start signal
Y9,YB,YD,YF
Execution prohibition flag
Y14,Y15,Y16,Y17
Positioning start signal
Y10,Y11,Y12,Y13
Positioning complete signal
X14,X15,X16,X17
BUSY signal
XC,XD,XE,XF
Start complete signal
X10,X11,X12,X13
Axis stop signal
Y4,Y5,Y6,Y7
M code ON signal
X4,X5,X6,X7
Error detection signal
X8,X9,XA,XB
Data write/read
Parameter write/read
Positioning data write/read
Block start data write/read
OPR operation (test)
Peripheral
JOG/Inching operation
device
Positioning operation (test)
interface
Operation monitor
Peripheral
device
QD75
Interface
with
PLC
CPU
1 - 12
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Drive unit READY signal
Upper/l o wer limi t signal
Near-point dog signal
Zero signal
Deviation counter clear
External
Pulse train
interface
Manual pulse generator A-phase
Manual pulse generator B-phase
Stop signal
External command signal
MELSEC-Q
External
signal
Drive
unit
Manual pulse
generator
External
signal
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