Mitsubishi Electric FR-A820-00046 Instruction Manual page 787

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Parameters
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.)
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.)
Error definition
Communication line
Communication option
itself
(When a communication
option is used)
Tab. 5-267: Stop mode selection
In communication by the communication option, E.OP1 is displayed.
Under position control, the operation is continued to the target position.
When the communication error is removed during deceleration, the motor re-accelerates.
Under position control, the motor does not re-accelerates even when the communication error is
removed during deceleration.
FR-A800
At fault occurrence
Pr. 502
Operating
setting
Indication
status
0
Coasts to
(initial
E.SER
stop
value)
1
E.SER after
Deceleration
stop
stop
2
Operation
continued at
Normal
the set
3
display
frequency of
Pr. 779
Coasts to
0, 3
stop
Deceleration
1, 2
E. 1 after stop
stop
(N) Operation via communication and its settings
Fault
Operating
(ALM)
status
signal
ON
Stop status
continues
ON after
stop
Automatic
restart
OFF
function
Normal
OFF
operation
E. 1
ON
Stop status
continues
ON after
stop
At fault removal
Fault
Indication
(ALM)
signal
ON
E.SER
Normal
OFF
display
Normal
OFF
display
E. 1
ON
5 - 607

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