187
Frequency setting by analog input (terminal 1, 2, 4)
4
(5) Function related to 4mA input check
Function
Operation
Refer to
page
Minimum frequency
Even if the input current decreases, minimum frequency setting clamp is valid.
Multi-speed operation
Operation by multiple speed signal has precedence even if input current decreases.
(Frequency is not retained when the input current decreases.)
Operation stops when a multi-speed signal turns OFF.
Jog operation
The JOG signal has precedence even during decrease in input current. (Frequency is not
retained when the input current decreases.)
Operation stops when the JOG signal is turned OFF during decrease in input current.
PU/jog operation is enabled during PID control.
At this time, PU/jog operation has precedence during decrease in input current.
MRS
Output is shut off by the MRS signal even if input current decreases. (The inverter stops
when the MRS signal is turned OFF.)
Remote setting
The retained frequency will not change even if remote acceleration/deceleration and
clear are performed during decrease in input current. Reflected at restoration. Remote
setting is invalid under PID control.
Retry
When retry was successful at error occurrence during decrease in input current, retained
frequency was not cleared and operation continues.
Added compensation,
override function
Operation of added compensation (terminal 1) and override compensation (terminal 2)
are invalid during decrease in input current.
Input filter time
constant
The value before filtering is detected.
When input current decreases, frequency after filtering (average value) is retained.
Forward/reverse
rotation prevention
Motor rotation direction can be restricted independently of 4mA input check setting.
PID control
Although PID operation is stopped when input current decreases, the X14 signal remains
ON. (PID operation is valid.) During the pre-charge operation, the pre-charge ending
level and the pre-charge limit are not applied.
The SLEEP function overrides the operation continuation selection (
Pr.573
≠
"2 or 3").
Even if the 4mA input is lost, the SLEEP function activates. PID operation restarts at the
specified frequency when the cancellation conditions for the SLEEP function are
satisfied.
Power failure stop
Even if input current decreases when undervoltage or power failure occurs, the motor
stops according to the setting of power-failure deceleration stop function. E.LCI occurs if
a fault occurs from a stop.
Pump function
If auxiliary motor switchover conditions of pump function is satisfied even when input
current decreases, motor connection/release operation is performed.
Switch-over
When the switchover function is operated, frequency is the same as that of the retained
frequency.
Note that if 4mA input is invalid once in switchover mode, the frequency is not retained
next time.
♦
Parameters referred to
♦
Pr. 73 Analog input selection
Refer to page 177
Pr. 267 Terminal 4 input selection
Refer to page 173
Summary of Contents for -NAFR-F720-00167-NA
Page 22: ...12 MEMO ...
Page 364: ...354 MEMO ...
Page 378: ...368 MEMO ...
Page 396: ...386 MEMO ...