Mitsubishi Electric FR-F800 Series Instruction Manual page 502

 Operation selection at a communication error (Pr.502, Pr.779)
• For communication using RS-485 terminals or a communication option, operation at a communication error can be
selected. The operation is active under the Network operation mode.
• 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 When the communication error is removed during deceleration, the motor re-accelerates.
• 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 parameter from 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
value)
1
Output to decelerate
and stop the motor.
2
3 Operation continues
at the frequency set
4
in Pr.779.
0, 3 Output shutoff
Output to decelerate
1, 2
and stop the motor.
Operation continues
4 at the frequency set
in Pr.779.
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Fault (ALM)
Indication
signal
*1
ON
"E.SER"
"E.SER" ON after stop
indication
OFF
*1
after stop.
Normal
OFF
"CF" warning
"E.1" ON
"E.1" after
ON after stop
stop
"CF" warning OFF
At fault removal
Operation Indication
Output stop status
*1
"E.SER"
continues.
*2
Normal
Restart
Normal Normal
Output stop status
"E.1"
continues.
Operation continues
at the frequency set "CF" warning OFF
in Pr.779.
5.12 (N) Communication operation parameters
1
2
3
Fault (ALM)
signal
ON
4
OFF
5
OFF
ON 6
7
8
9
10
501
5. PARAMETERS