Mitsubishi Electric 800 Series Instruction Manual page 60

NOTE
• Only when the contents of the command request (request for changing the inverter setting: PKW, HSW, STW/ECW) from
the master changed, the inverter processes the request. If the contents of the command request are identical with those of
the last request, the inverter does not process the request. (The received request is cleared.) For instance, while the master
keeps sending the "network operation mode enable" command, changing the mode to the PU operation mode with
switchover function does not allow the "network operation mode enable" command to be executed due to the same contents
as that sent last time. Therefore, the operation mode remains the PU operation mode without changing to the Network
operation mode. In this case, send another command as "PU operation mode enable" from the master once, then send the
"network operation mode enable" command again.
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PPO TYPE SUPPORT SPECIFICATION