Mitsubishi Electric MELSEC Q Series Programming Manual page 39

2 SAFETY OBSERVATION FUNCTION
Controls machine systems.
[Created by user]
Controls safety signal and
functional safety signal
(safety communication) I/O.
[Created by user]
Compares the Motion
CPU side safety signal.
[Created by system]
Monitors if motor speed is
within the safety speed.
[Created by system]
Sends/receives safety
information and compares
the Motion CPU side
safety information
[Created by system]
(3) Safety communication function
Communicates safety information with the servo amplifier by using the safety
communication in a system compatible with safety communication.
Also checks the operation and status of safety observation functions in the servo
amplifier with the safety sequence program of the user.
PLC CPU
Machine control
sequence program
User safety
sequence program
Safety signal
Safety signal, Comparison error
comparison
Safety signal, Comparison error
sequence program
Command/detected speed,
Speed monitoring
sequence program
Safety
communication
sequence program
Bus
Shut-off signal
transmission
Safety signal module
PLC CPU side
safety signal
Motion CPU
Machine control
Motion program
Multiple CPU high
sequence program
speed transmission
Safety signal
SLS error
Speed monitoring
SLS error
Safety information
communication
Safety information
RIO
transmission
Motion CPU side
safety signal
2 - 2
Controls machine systems.
[Created by user]
Controls safety
[Created by user]
User safety
Compares the PLC CPU
side safety signal
[Executed by system]
comparison
Monitors if motor speed is
within the safety speed.
[Executed by system]
Sends/receives safety
Safety
information and compares
the PLC CPU side
function
safety information
[Executed by system]
Shut-off Safety
signal information
Safety
communication
compatible servo
amplifier
: System internal process by Motion CPU.
: Process created automatically by Motion CPU.
signal I/O.
Servo motor/
safety encoder
or
standard encoder