Mitsubishi Electric FR-A820-00046 Instruction Manual page 874

(N) Operation via communication and its settings
Example RS-485 terminal communication, Pr. 539 = "0.1 to 999.8 s"
Example: RS-485 terminal communication, Pr. 539 = "0.1 to 999.8s"
Query communication
Operation mode
Inverter (slave)
Inverter (slave)
Communication
check counter
Broadcast communication
Operation mode
Inverter (slave)
Inverter (slave)
Communication
check counter
Fig. 5-327:
NOTE For the RS-485 terminal communication, the operation at a communication error occurrence
depends on the Pr. 502 "Stop mode selection at communication error" setting.
(Refer to page 5-626.)
5 - 672
External
PLC (master)
PLC (master)
Pr. 539
ALM
External
PLC (master)
PLC (master)
Pr. 539
ALM
Signal loss detection
NET
Query Message 1
Data absence time
(3.5 bytes or more)
Response Message 1
Check start
OFF
NET
Query Message 2
Query Message 1
Data absence time
(3.5 bytes or more)
Check start
OFF
Query Message 2
Response Message 2
Fault
(E.SER)
Time
ON
Parameters
Fault
(E.SER)
Time
ON
I002746E