Mitsubishi Electric FR-F800, Instruction Manual

Page: 615 / 834

Parameters (N) Operation via communication and its settings
FR-F800 5 - 453
Operation selection at a communication error (Pr. 502, Pr. 779)
●
For communication using RS-485 terminals or a communication option, operation at a commu-
nication error can be selected. The operation is active under the Network operation mode.
●
Select the stop operation at the retry count excess (Pr. 335, only with Mitsubishi inverter protocol)
or at a signal loss detection (Pr. 336, Pr. 539).
●
When a communication error is detected while communication with the RS-485 terminals is
performed, the alarm (LF) signal is output to an output terminal of the inverter.To use the LF signal,
set "98 (positive logic) or 198 (negative logic)" in any of Pr. 190 to Pr. 196 (output terminal function
selection) to assign the function to the output terminal.
(While communication is performed with a communication option, LF signal is output only when
"3" is set in Pr. 502.)
In communication by the communication option, E.OP1 is displayed.
When the communication error is removed during deceleration, the motor re-accelerates.
NOTES Turning OFF the inverter's power supply clears the modified parameter settings when Pr. 342 = "1
(write only to RAM)". Therefore, the parameter values at next power-ON are the values last stored
in EEPROM.
The parameter setting written in RAM cannot be checked on the operation panel. (The values dis-
played on the operation panel are the ones stored in EEPROM.)
Error definition
Pr. 502
setting
At fault occurrence At fault removal
Operating
status
Indication
Fault (ALM)
signal
Operating
status
Indication
Fault (ALM)
signal
Communication
line
0
(initial value)
Coasts to
stop
E.SER
ON
Stop status
continues
E.SER
ON
1
Deceleration
stop
E.SER after
stop
ON after stop
2 OFF
Automatic
restart
function
Normal
display
OFF
3
Operation
continued at
the set
frequency of
Pr. 779
Normal
display
OFF
Normal
operation
Normal
display
OFF
Communication
option itself (When
a communication
option is used)
0, 3
Coasts to
stop
E.1 ON
Stop status
continues
E.1 ON
1, 2
Deceleration
stop
E.1 after stop ON after stop
Tab. 5-227: Stop mode selection