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(2) Function related to 4mA input check
Function
Minimum frequency
Even if the input current decreases, minimum frequency setting clamp is valid.
Operation by multiple speed signal has precedence even if input current decreases.
Multi-speed operation
(Frequency is not retained when the input current decreases.)
Operation stops when a multi-speed signal turns OFF.
The Jog signal has precedence. (Frequency is not retained when the input current
decreases.)
Jog operation
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.
Output is shut off by the MRS signal even if input current decreases. (The inverter
MRS
stops when the MRS signal is turned OFF.)
The retained frequency will not change even if remote acceleration/deceleration and
Remote setting
clear are performed during decrease in input current. Reflected at restoration.
When retry was successful at error occurrence during decrease in input current,
Retry
retained frequency was not cleared and operation continues.
Added compensation,
Operation of added compensation (terminal 1) and override compensation (terminal
override function
2) are invalid during decrease in input current.
Input filter time
The value before filtering is detected.
constant
When input current decreases, frequency after filtering (average value) is retained.
Forward/reverse
Motor rotation direction can be restricted independently of 4mA input check setting.
rotation prevention
Although PID operation is stopped when input current decreases, the X14 signal
PID control
remains ON. (PID operation is valid.)
Even if input current decreases when undervoltage or power failure occurs, the motor
Power failure stop
stops according to the setting of power-failure deceleration stop function
When the switchover function is operated, frequency is the same as that of the
retained frequency.
Switch-over
Note that if 4mA input is made invalid once in switchover mode, the frequency is not
retained next time.
Parameters referred to
Pr. 73 Analog input selection
Pr. 267 Terminal 4 input selection
Operation (Pr. 573 = 1)
Refer to page
291
Refer to page
291
Frequency/torque setting by analog
input (terminal 1, 2, 4)
Refer to
page
159
168
170
238
172
277
295
297
316
369
274
321
4
311
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