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Chapter 7 Memory Configuration and Data Process
Transfer the servo parameter at this point to the servo amplifier
Md.26
Axis operation
status
Communication
operation status with
servo amplifier
Servo parameter of
buffer memory/internal
memory
0 (Standby)
21 (Servo OFF)
20 (Servo amplifier has not been connected/servo amplifier power OFF)
Communication start validCommunication invalid
During
communication
Communication start (Axis connection)
PLC READY [Y0]
READY [X0]
Write value by sequence program/GX Works2
Indefinite value Value of internal memory (nonvolatile)
Servo parameter setting from
sequence program/GX Works2 (A)
PLC CPU
RUN
Initialization
completion
of QD77MS
Buffer memory/
internal memory
data setting
Axis connection completion
QD77MS
power ON
PLC READY
signal [Y0]
OFF ON (B)
Fig. 7.2 When the servo amplifier had started before the system's power supply ON
(The servo series of internal memory (nonvolatile) is not set.)
(2) When the servo amplifier's power supply is turned ON after the PLC READY
signal [Y0] is turned OFF to ON (Fig. 7.3 (C)).
Communication start timing to the servo amplifier: When the servo amplifier
had started (Fig. 7.3 (B)).
Transfer the servo parameter : The data written from
sequence program/
GX Works2 before the
PLC READY signal [Y0]
ON (Fig. 7.3 (A)).
Servo parameter setting from
sequence program/GX Works2 (A)
PLC CPU
RUN
Initialization
completion
of QD77MS
Buffer memory/
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
buffer memory/internal
memory
QD77MS
power ON
PLC READY [Y0]
READY [X0]
Write value by sequence program/GX Works2
Indefinite value Value of internal memory (nonvolatile)
Communication start valid
Servo amplifier
power ON (B)
PLC READY
signal [Y0]
OFF ON (C)
Communication invalid
During
communication
Communication start
(Axis connection)
Transfer the servo parameter at this point to the
servo amplifier
Fig. 7.3 When the servo amplifier had started after the PLC READY signal [Y0] is turned OFF to ON