171
Communication operation and setting
4
PARAMETERS
(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
Operation at fault removal
Pr. 502 Setting Operation Indication Fault Output
0 (initial value) Coasts to stop E. PUE lit Provided
1
Decelerates to stop E. PUE lit after stop
Provided after stop
2 Not provided
3
Operates at the speed set in
Pr. 779
Normal display Not provided
Pr.502 Setting Operation Indication Fault Output
0 (initial value)
Kept stopped E. PUE Kept provided
1
2 Automatic restart functions Normal display Not provided
3 Normal operation Normal display Not provided
Pr. 502 setting = "0" (initial value) Pr. 502 setting = "1"
Pr. 502 setting = "2" Pr. 502 setting = "3"
∗ 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).
Time
Communication
fault
Rotation speed
Fault display
(E.PUE)
Fault output
(ALM)
ON
OFF OFF
Display
ON
OFF
Motor coasting
Fault occurrence Fault removal
Time
Communication
fault
Rotation speed
Fault display
(E.PUE)
Fault output
(ALM)
ON
OFF OFF
Display
ONOFF
Decelerates to stop
Fault occurrence Fault removal
Time
Communication
fault
Rotation speed
Fault display
(E.PUE)
Fault output
(ALM)
ONOFF OFF
Display
OFF
Decelerates
to stop
Fault occurrence Fault removal
Time
Communication
fault
Fault display
Fault output
(ALM)
ONOFF OFF
OFF
OFF OFF
Fault recognition Fault removal
Pr. 779 = "9999"
Not displayed
Rotation speed
ON
Alarm output
(LF) ∗
Pr. 779 "9999"
(Runs at the speed setting of Pr. 779 )
