Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 191

Communication operation and setting
(3) Stop operation selection at occurrence of communication fault (Pr. 502)
Stop operation when retry count exceeds (Mitsubishi inverter protocol only) or signal loss detection error occurs can be
selected.
Operation at fault occurrence
Pr. 502 Setting
0 (initial value)
1
2
Operates at the speed set in
3
Operation at fault removal
Pr. 502 Setting
0 (initial value)
1
2 Automatic restart functions
3
Pr. 502 setting = "0" (initial value)
Communication
OFF
fault
Fault display
(E.PUE)
Fault output
OFF
(ALM)
Pr. 502 setting = "2"
Fault occurrence
Communication
OFF
fault
Fault display
(E.PUE)
Fault output
OFF
(ALM)
 When a communication error is detected while Pr. 502 = "3," the alarm (LF) is output to an output terminal of the drive unit. To use the LF signal, assign the
function to an output terminal by setting "98 (positive logic) or 198 (negative logic)" in Pr. 190 or Pr. 192 (Output terminal function selection).
188
Operation
Coasts to stop
Decelerates to stop
Pr. 779
Operation
Kept stopped
Normal operation
Fault occurrence Fault removal
ON
Motor coasting
Display
ON
Fault removal
ON OFF
Decelerates
to stop
Display
Indication
E. PUE lit
E. PUE lit after stop
Normal display
Indication
E. PUE
Normal display
Normal display
Pr. 502 setting = "1"
Communication
OFF
fault
Time
Fault display
(E.PUE)
Fault output
(ALM)
Pr. 502 setting = "3"
Communication
fault
Time
Not displayed
Fault display
Fault output
(ALM)
Alarm output
(LF) ∗
Fault Output
Provided
Provided after stop
Not provided
Not provided
Fault Output
Kept provided
Not provided
Not provided
Fault occurrence
OFF
ON
Decelerates to stop
OFF
Fault recognition Fault removal
OFF ON
Pr. 779 = "9999"
"9999"
Pr. 779
(Runs at the speed setting of Pr. 779 )
OFF
OFF ON
Fault removal
OFF
Time
Display
ON
OFF
Time
OFF