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(5) 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 even during decrease in input current. (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 stops
MRS
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. Remote
setting is invalid under PID control.
When retry was successful at error occurrence during decrease in input current, retained
Retry
frequency was not cleared and operation continues.
Added compensation,
Operation of added compensation (terminal 1) and override compensation (terminal 2)
override function
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 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").
PID control
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.
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. E.LCI occurs if
a fault occurs from a stop.
If auxiliary motor switchover conditions of pump function is satisfied even when input
Pump function
current decreases, motor connection/release operation is performed.
When the switchover function is operated, frequency is the same as that of the retained
frequency.
Switch-over
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
Pr. 267 Terminal 4 input selection
Refer to page 177
Refer to page 173
Frequency setting by analog input (terminal 1, 2, 4)
Operation
Refer to
page
87
93
95
126
98
161
177
178
192
263
158
284
197
4
187
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