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Chapter 7 Memory Configuration and Data Process
(1) When the servo amplifier's power supply is turned ON before the system's
power supply ON.
Communication start timing to the servo amplifier: Initialization completion
(Fig. 7.1 (A))
Transfer the servo parameter : The data stored (backed
up) in the internal
memory (nonvolatile).
0 (Standby)
21 (Servo OFF)
20 (Servo amplifier has not been connected/servo amplifier power OFF)
Transfer the servo parameter at this point to the servo amplifier
Communication invalid
During
communication
Communication start (Axis connection)
Md.26
Axis operation
status
Communication
operation status with
servo amplifier
Servo parameter of
internal memory
Indefinite value
Value of internal memory (nonvolatile)
Initialization
completion
of QD77GF (A)
Internal memory
data setting
Axis connection completion
QD77GF
power ON
Fig. 7.1 When the servo amplifier had started before the system's power supply ON
(2) When the servo amplifier's power supply is turned ON after the PLC READY
signal [Y0] is turned OFF to ON (Fig. 7.2 (B)).
Communication start timing to the servo amplifier: When the servo amplifier
had started (Fig. 7.2 (A)).
Transfer the servo parameter : The data stored (backed
up) in the internal
memory (nonvolatile).
PLC CPU
RUN
Initialization
completion
of QD77GF
Internal memory
data setting
Axis connection completion
0 (Standby)
21 (Servo OFF)
20 (Servo amplifier has not been connected/servo amplifier power OFF)
Md.26
Axis operation
status
Communication
operation status with
servo amplifier
Servo parameter of
internal memory
QD77GF
power ON
PLC READY [Y0]
READY [X0]
Indefinite value Value of internal memory (nonvolatile)
Communication start valid
Servo amplifier
power ON (A)
PLC READY
signal [Y0]
OFF ON (B)
Communication invalid
During
communication
Communication start
(Axis connection)
Transfer the servo parameter at this point to the
servo amplifier
Fig. 7.2 When the servo amplifier had started after the PLC READY signal [Y0] is turned OFF to ON
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