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MELSEC-Q
7 MEMORY CONFIGURATION AND DATA PROCESS
How to transfer the servo parameter which wrote it in the flash ROM
to servo amplifier
Flash ROM writing carried out after the servo parameter is set up in the buffer
memory.
After that, when the power is turned ON or the PLC CPU is reset, the servo
parameters stored in the flash ROM is transmitted to the buffer memory.
When the servo parameter is written in the flash ROM, it is unnecessary to use a
setup from the PLC program.
Servo parameter of the buffer memory
The following shows details about the operation timing and details the servo
parameter transfer of the buffer memory.
Communication
operation status
with servo amplifer
Servo parameter of
buffer memory
Indefinite value
QD75MH
power ON
Buffer memory
data setting
Initialization
completion
of QD75MH (A)
PLC CPU
RUN
PLC READY signal [Y0]
OFF ON (B)
Value of flash ROM
Write value by PLC program
Communication
start valid
t
Communication
start invalid
Servo parameter
setting from PLC
program (C)
1
2
2
3
1
: The servo parameter that it is stored into the flash ROM is transfered to the buffer memory by the QD75MH
initialization of the data, when the power is turned ON.
2
: Communication with servo amplifer is carried out if the QD75MH initialization of the data is completed after
power supply ON.
3
: When the servo parameter is written in the flash ROM, it is unnecessary to use a setup from the PLC program.
Fig. 7.1 Operation timing in the servo parameter transfer of the buffer memory
Operation details
(1) Servo parameter transfers when servo amplifier had started and the power
supply of QD75MH is turned ON.
(a) When the servo parameter "
Pr.100
Servo series"
"0" is stored flash ROM.
Communication start timing to the servo amplifier: Initialization completion
(Fig. 7.1 A)
Transfer the servo parameter : The data stored (backed
up) in the flash ROM.