Mitsubishi A1SD75M3 User Manual page 327

7 MEMORY CONFIGURATION AND DATA PROCESS
*: About start of communication with the servo amplifier
Communication with the servo amplifier starts when the following two conditions hold.
(Conditions)
•
The AD75 and servo amplifier has been powered on and started.
•
The servo basic parameter "motor capacity" in the AD75 OS memory is other than "0".
(Communication is continued if the servo basic parameter "motor capacity" of the OS memory is set to "0"
after establishment of communication.)
At power-on or PLC CPU reset, the data stored (backed up) in the flash ROM are transferred to the OS
memory. (Refer to section 7.2 (1).)
Therefore, when the servo basic parameter "motor capacity" stored in the flash ROM is not "0" and the servo
amplifier has started earlier than the AD75, communication with the servo amplifier starts before the PLC
CPU starts RUN, so the servo parameters transferred to the servo amplifier are the data stored in the flash
ROM.
[How to transfer the servo parameters, which were set from the sequence program, to the
servo amplifier]
(Method 1)
Set the value of the servo basic parameter "motor capacity" stored in the flash ROM to "0". (The factory
setting is 0.)
This turns the servo basic parameter "motor capacity" in the flash ROM to "0" at power-on or PLC CPU
reset, disabling communication from starting since the communication starting condition does not hold.
When the servo parameters ("motor capacity" is not "0") are set from the sequence program and the PLC
READY signal [Y1D] is turned from OFF to ON, the servo parameters in the buffer memory are transferred to
the OS memory, and communication starts since the communication start conditions have held.
Therefore, the servo parameters transferred to the servo amplifier are the values set from the sequence
program.
(Method 2)
Turn the PLC READY signal [Y1D] from OFF to ON using the sequence program. When the AD75 READY
signal [X0] then turns from ON to OFF, power on the servo amplifier.
When the AD75 READY signal [X0] turns OFF, the servo parameters set from the sequence program are
reflected on the OS memory.
Therefore, the servo parameters transferred to the servo amplifier are the values set from the sequence
program.
[How to transfer the servo parameters, which were written to the flash ROM, to the servo
amplifier]
Set the servo parameters to the buffer memory and write them to the flash ROM. After that, switch power on
again or reset the PLC CPU.
After the servo parameters to be transferred to the servo amplifier have been written to the flash ROM, the
setting of the servo parameters from the sequence program is not necessary.
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MELSEC-A