172
Communication operation and setting
REMARKS
The fault output indicates fault output signal (ALM signal) or alarm bit output.
When the setting was made to provide a fault output, the fault description is stored into the faults history. (The fault description
is written to the faults history when a fault output is provided.)
When no fault output is provided, the fault record overwrites the fault indication of the faults history temporarily, but is not
stored.
After the fault is removed, the fault indication returns to the ordinary monitor, and the faults 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 drive unit does
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 drive unit operates
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 drive unit starts its operation in accordance with the
start and speed commands which were set before the error.
Parameters referred to
Pr. 7 Acceleration time, Pr. 8 Deceleration time Refer to page 87
Pr. 190, Pr. 192 (output terminal function selection)
Refer to page 106
