Mitsubishi Electric FR-A820-00046 Instruction Manual page 802

(N) Operation via communication and its settings
General flowchart
CAUTION:
E
● 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 cable breakage etc., the inverter cannot be stopped. When the communication check
time interval has elapsed, the inverter will trip (E.PUE, E.SER).
The inverter can be coasted to a stop by switching ON the RES signals or by switching the
power OFF.
● If communication is broken due to signal cable breakage, computer fault etc., the inverter
does not detect such a fault. This should be fully noted.
5 - 622
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
Fig. 5-315:
General flow
Parameters