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MELSEC-Q
1 PRODUCT OUTLINE
1.1.4 Communicating signals between QD70 and each module
The outline of the signal communication between the QD70 (positioning module) and
PLC CPU, peripheral device (GX Configurator-PT) and drive unit, etc., is shown below.
(A peripheral device communicates with the QD70 via the PLC CPU to which it is
connected)
Refer to Chapter 3 for details of the I/O signals.
PLC READY signal
Module READY signal
JOG start signal
BUSY signal
Drive
unit
Deviation counter clear
Pulse train
QD70
Y0
X0
PLC CPU
Near-point dog singal
Monitor data
Y18 to Y1F
X10 to X17
Y10 to Y17
X1
Y8 to YF
X18 to X1F
X8 to XF
X2
Axis warning occurrence
signal
24VDC
Power supply
Peripheral device
(GX Configurator-PT)
Initial setting/Auto refresh/
Operation monitor
Positioning start
Start complete signal
Axis stop signal
Positioning complete
signal
Axis error occurrence
signal
Mechanical
system inputs
(Switches)
Speed-position switching
signal
(For pulse train output)
Zero signal
Date write/read
Interface
with
PLC CPU
Peripheral
device
interface
External
interface
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