System Configuration - Mitsubishi Electric MELSEC Q Series Programming Manual

1 OVERVIEW

1.2 System Configuration

Main base
Q3 DB
Power
supply
Q6 P
USB/RS-232/
Ethernet
Ethernet
GX Works2/GX Developer
MT Developer2
Terminal block
(Motion CPU)
Terminal block
(PLC CPU)
Emergency stop
switch
Safety observation function is configured by Motion CPU built-in safety observation
(Q17 DSCPU/Q17 DCPU-S1), PLC CPU and safety signal module (Q173DSXY).
Wire two signals to the safety signal module for PLC CPU and Motion CPU. The safety
observation is executed in the Motion CPU and PLC CPU individually.
The speed monitoring function monitors both the command speed and feedback speed.
It also uses external auxiliary pulses to ensure safety when the motor is stopped.
When performing speed monitoring function with a safety encoder compatible Motion
CPU and safety encoder compatible servo amplifier, external auxiliary pulse input is
not necessary.
Refer to "Functional safety unit MR-D30 Instruction Manual" for details of safety
communication function compatible servo amplifiers and safety encoder compatible
servo amplifiers.
Only one PLC CPU (CPU No.1) and one Motion CPU (CPU No.2) execute safety
observation. The other CPUs (CPU No.3 or later) cannot execute safety observation.
The diagram below shows the system configuration for safety observation function.
MotionCPU built-in safety observation
PLC CPU Safety signal module
Q173DSX Y
QnUD CPU
I/O cable
RIO
cable
Safety door Light curtain
switch
(Note-1): When performing standstill monitoring, an external auxiliary pulse generator is required.
SSCNET (/H)
Shut-off
Shut-off
External auxiliary pulses
Mechanical attachment
SSCNET (/H)
1 - 5
Main power
MC
When using
servo amplifier
without a S TO
MC
function
Servo amplifier
STO
STO
Servo motor/
standard encoder
Safety
communication
compatible
servo amplifier
Servo motor/
safety encoder
or standard
(Note-1)
encoder