Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 192

REMARKS
 The fault output indicates fault output (ALM) signal or alarm bit output.
 When the setting was made to provide a fault output, the fault description is stored into the fault history. (The fault description is
written to the fault history when a fault output is provided.)
When no fault output is provided, the fault record overwrites the fault indication of the fault history temporarily, but is not stored.
After the fault is removed, the fault indication returns to the ordinary monitor, and the fault history returns to the preceding fault
indication.
 When the Pr. 502 setting is "1, 2 or 3", the deceleration time is the ordinary deceleration time setting (e.g. Pr. 8, Pr. 44, Pr. 45). In
addition, acceleration time for restart is the normal acceleration time (e.g. Pr. 7, Pr. 44).
 When "2, 3" is set in Pr. 502, run command/speed command at restart follows the command before an fault occurrence.
 When "2" is set in Pr. 502 at occurrence of a communication error and the error is removed during deceleration, the drive unit
accelerates again at that point.
If the communication error setting is disabled with Pr. 502 = "3," Pr. 121 = "9999," and Pr. 122 = "9999," the

not continue its operation with the speed set by Pr. 779 at a communication error.
If a communication error occurs while continuous operation at Pr. 779 is selected with Pr. 502 = "3," the

at the speed set in Pr. 779 even though the speed command source is at the external terminals.
Example) If a communication error occurs while Pr. 339 = "2" and the external terminal RL is ON, the operation is
continued at the speed set in Pr. 779.
After a communication error has been removed while Pr. 502 = "3," the

start and speed commands which were set before the error.
Parameters referred to
Pr. 7 Acceleration time, Pr. 8 Deceleration time
Pr. 190, Pr. 192 (output terminal function selection)
Communication operation and setting
drive unit
Refer to page 97.
Refer to page 123.
drive unit
drive unit
starts its operation in accordance with the
does
operates
4
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