218
Communication operation and setting
REMARKS
⋅
Fault output indicates the fault output signal (ALM signal) and an alarm bit output.
⋅
When the fault output setting is active, a fault record is saved in the faults history. (A fault record is written to the faults history at a
fault output. )
When the fault output setting is not active, a fault record is overwritten to the faults history temporarily but not stored.
After the error is removed, the fault indication goes back to normal indication in the monitor, and the faults history goes back to the
previous status.
⋅
If
Pr. 502
is set to "1, 2, or 3," the normal deceleration time setting (settings like
Pr. 8, Pr. 44, and Pr. 45
) is applied as the
deceleration time. Normal acceleration time setting (settings like
Pr. 7 and Pr. 44
) is applied as the acceleration time for restart.
⋅
When
Pr.502
= "2 or 3," the inverter operates with the start command and the speed command, which were used before the error.
⋅
If a communication line error occurs, then the error is removed during deceleration while
Pr. 502
= "2," the motor re-accelerates
as soon as the error is removed.
⋅
These parameters are valid when communication is performed from the RS-485 terminals or a communication option.
⋅
These parameters are valid under the Network operation mode. When performing communication with RS-485 terminals, set
Pr.
551
PU mode operation command source selection="2 (initial setting)."
⋅
Pr. 502
is valid for the device that has the command source under the Network operation mode. If a communication option is
installed while
Pr. 550
= "9999 (initial setting)," a communication error in RS-485 terminals occurs and
Pr. 502
becomes invalid.
⋅
If the communication error setting is disabled with
Pr. 502
= "3,"
Pr. 335
= "9999," and
Pr. 539
= "9999," the inverter does not
continue its operation with the frequency 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 inverter operates at the
frequency 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
frequency set in
Pr. 779
.
♦
Parameters referred to
♦
Pr. 7 Acceleration time Pr. 8 Deceleration time
Pr. 335 RS-485 communication retry count
Pr. 336 RS-485 communication check time interval
Pr. 539 Modbus-RTU communication check time interval
Pr. 550 NET mode operation command source selection
Pr. 551 PU mode operation command source selection
Summary of Contents for 700 Series
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