Mitsubishi Electric FR-A800 Series Instruction Manual page 666

• Select the stop operation at the retry count excess (Pr.335, enabled only when the Mitsubishi inverter protocol is selected)
or at a signal loss detection (Pr.336, Pr.539).
Fault type
Communication
line
Communication
option (when a
communication
option is used)
*1 If in communication by the communication option, "E.OP1" is displayed.
*2 Under position control, the operation is continued to the target position.
*3 When the communication error is removed during deceleration, the motor re-accelerates. Under position control, the motor does not re-accelerate
even when the communication error is removed during deceleration.
• The motor is decelerated to a stop according to the setting of Pr.111 Third deceleration time when an error occurs while
Pr.502 = "11 or 12".
Pr.502 setting
0
1 to 4
11, 12
• 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. (To output
the LF signal even if communication through RS-485 terminals is not performed for the time set in Pr.336 or longer, or
during communication using a communication option, set "3 or 4" in Pr.502.)
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At fault occurrence
Pr.502
setting
Operation
0 (initial
Output shutoff
E. SER
value)
1, 11 "E.SER"
Output to
indication after
decelerate and
2, 12
stop the motor.
stop
3 Operation Normal
continues at
the frequency
4 "CF" warning
*2
set in Pr.779.
0, 3 Output shutoff "E. 1"
Output to
1, 2, 11,
decelerate and "E. 1" after stop
12
stop the motor.
Operation
continues at
4 "CF" warning
the frequency
*2
set in Pr.779.
Operation to a stop at a communication error occurrence
Output shutoff
Deceleration stop according to the selected deceleration time (selectable using the RT or X9 signal)
Deceleration stop according to the setting of Pr.111
search engine
Fault (ALM)
Indication
signal
*1
ON
ON after stop
OFF
*1
OFF
ON
ON after stop
OFF
At fault removal
Operation Indication
Output stop
*1
status
E. SER
continues.
*3
Normal
Restart
Normal Normal
Output stop
status "E. 1"
continues.
Operation
continues at
"CF" warning
the frequency
set in Pr.779.
5.15 (N) Communication operation parameters
1
Fault (ALM)
2
signal
ON
3
OFF
4
OFF
5
ON
6
OFF
7
8
9
10
665
5. PARAMETERS