Mitsubishi Electric FR-A720-0.4K Instruction Manual page 352

General flowchart
Always set the communication check time interval before starting operation to prevent hazardous conditions.
Data communication is not started automatically but is made only once when the computer provides a
communication request. If communication is disabled during operation due to signal loss etc., the inverter cannot
be stopped. When the communication check time interval has elapsed, the inverter will come to a trip (E.PUE,
E.SER). The inverter can be coasted to a stop by switching ON its RES signal or by switching power OFF.
If communication is broken due to signal loss, computer fault etc., the inverter does not detect such a fault. This
should be fully noted.
Communication operation and setting
Port open
Communication setting
Time out setting
Send data processing
Data setting
Sum code calculation
Data transmission
Receive data waiting
Receive data processing
Data retrieval
Screen display
CAUTION
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