Mitsubishi Electric 800 Series Instruction Manual page 31

Rs-485 interface board, rs-485 communication terminals
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• The following charts show the inverter operations when a communication line error occurs.
Pr.502 = "0" (initial value)
Fault detected
Communication
OFF
fault
Motor coasting
Fault indication
(E.SER)
Fault output
OFF
(ALM)
Alarm output
OFF
(LF)
Pr.502 = "3"
Fault detected
OFF
ON
Communication
fault
Pr.779="9999"
Pr.779="9999"
Pr.779="9999"
Output frequency
Pr.779
Pr.779≠"9999"
(Operation continues at the frequency setting of Pr.779)
Not displayed
Fault indication
Fault output
OFF
(ALM)
Alarm output
OFF
ON
(LF)
30
PARAMETER
Pr.502 = "1"
Fault cleared
ON
OFF
Communication
fault
Time
Fault indication
Display
(E.SER)
Fault output
ON
(ALM)
Alarm output
ON
OFF
(LF)
Pr.502 = "4"
Fault cleared
OFF
Communication
fault
Output frequency
Pr.779
(Operation continues at the frequency setting of Pr.779)
Warning
Time
indication
(CF)
Fault output
(ALM)
Alarm output
OFF
(LF)
Fault detected
Fault cleared
OFF
ON
OFF
Motor coasting
Time
Display
OFF
ON
OFF
ON
OFF
Fault detected
Fault cleared
OFF
ON
OFF
Pr.779="9999"
Pr.779="9999"
Pr.779="9999"
Pr.779≠"9999"
Time
Display
OFF
OFF
ON
OFF
Pr.502 = "2"
Fault detected
OFF
ON
Communication
fault
Decelerates
to stop
Fault indication
(E.SER)
Fault output
OFF
(ALM)
Alarm output
OFF
ON
(LF)
Fault cleared
OFF
Time
Display
OFF

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