Mitsubishi Electric MELSEC Q Series User Manual page 86

6 DATA USED FOR POSITIONING CONTROL
FROM(P) instruction, DFRO(P) instruction
MOV(P) instruction, DMOV(P) instruction
QD74MH
Internal memory
Parameter
(2) Transmitting the servo parameters from servo amplifier to buffer
memory of QD74MH
The parameters changed in the servo amplifier can be automatically transmitted
to the buffer memory of QD74MH. However, they cannot be transmitted to the
flash ROM of QD74MH. Since the contents changed is lost by turning OFF of
the system power supply or reset of the PLC CPU, execute the flash ROM write,
if required.
There is a limitation in the write count to the flash ROM. (Refer to Section 10.22.)
Transmitting procedure is shown below.
1) The parameters can be changed by MR Configurator or the parameters, such
as gain by auto tuning.
2) The servo parameters changed in procedure 1) can be automatically
transmitted to the buffer memory of QD74MH.
3) When "1" is set in the "
program, the buffer memory data can be transmitted to the flash ROM.
PLC READY ON
2)
Servo parameter change
1)
MR Configurator
(Servo set up software)
Flash ROM write request" in the sequence
Cd.100
PLC CPU
TO(P) instruction, DTO(P) instruction
MOV(P) instruction, DMOV(P) instruction
3) Flash ROM write request ON
Buffer memory
System power supply ON/
Reset of the PLC CPU
Parameter
Positioning data
Servo parameter
"1" is set in "
ROM write request".
Monitor data
3) Flash ROM write operation
Control data
Interface for
communication with
servo amplifier
Communication start with servo amplifier
(PLC READY ON (First time only))
Servo amplifier
1)
6 - 7
MELSEC-Q
Flash ROM
Parameter
Positioning data
Servo parameter
Flash
Cd.100