Initial Setting Of Operation Via Communication - Mitsubishi Electric FR-F820-04750 Instruction Manual

(N) Operation via communication and its settings
5.12.3

Initial setting of operation via communication

Set the action when the inverter is performing operation via communication.
● Set the communication protocol. (Mitsubishi inverter protocol/MODBUS RTU protocol)
● Set the action at fault occurrence or at writing of parameters
Pr.
549
N000
342
N001
502
N013
779
N014
In communication by the communication option, E.OP1 is displayed.
Setting the communication protocol (Pr. 549)
● Select the communication protocol.
● The MODBUS RTU protocol can be used by communication from the RS-485 terminals.
Tab. 5-226: Protocol selection
Communication EEPROM write selection (Pr. 342)
● When parameter write is performed via the inverter PU connector, RS-485 terminal, USB commu-
nication, or a communication option, the parameters storage device can be changed from
EEPROM + RAM to RAM only. Use this function if parameter settings are changed frequently.
● When changing the parameter values frequently, set "1" in Pr. 342 "Communication EEPROM write
selection" to write them to the RAM only. The life of the EEPROM will be shorter if parameter write
is performed frequently with the setting unchanged from "0 (initial value)" (EEPROM write).
5 - 452
Name
Protocol selection
Communication EEPROM
write selection
Stop mode selection at
communication error
Operation frequency
during communication
error
Pr. 549 setting Communication protocol
0(initial value) Mitsubishi inverter protocol (computer link)
1 MODBUS RTU protocol
2 BACnet MS/TP protocol
Initial Setting
Description
value range
0 Mitsubishi inverter protocol (computer link)
0 1 MODBUS RTU protocol
2 BACnet MS/TP protocol
Parameter values written by communication are
0
written to the EEPROM and RAM.
0
Parameter values written by communication are
1
written to the RAM.
At fault occurrence
Coasts to stop
0
E.SER display
ALM signal output
Deceleration stop
E.SER display after stop
1
0
ALM signal output after
stop
Deceleration stop
2
E.SER display after stop
Operation continued at
3 the set frequency of
Pr. 779
Set the frequency to be run at a communication error
0 to 590 Hz
occurrence.
9999
The motor runs at the frequency used before the
9999
communication error.
Parameters
At fault removal
Stays stopped
(E.SER display )
Stays stopped
(E.SER display )
Automatic restart
function
Normal operation