Mitsubishi FR-A740-00023-EC Instruction Manual page 304

Frequency/torque setting by analog
input (terminal 1, 2, 4)
(2) Function related to 4mA input check
Function
Minimum frequency
Multi-speed operation
Jog operation
MRS
Remote setting
Retry
Added compensation,
override function
Input filter time
constant
Forward/reverse
rotation prevention
PID control
Power failure stop
Traverse function
Switch-over
♦ Parameters referred to ♦
Pr. 73 Analog input selection
Pr. 267 Terminal 4 input selection
294
Even if the input current decreases, minimum frequency setting clamp is valid.
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.
The Jog signal has precedence. (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.
Output is shut off by the MRS signal even if input current decreases. (The inverter
stops when the MRS signal is turned off.)
The retained frequency will not change even if remote acceleration/deceleration and
clear are performed during decrease in input current. Reflected at restoration.
When retry was successful at error occurrence during decrease in input current,
retained frequency was not cleared and operation continues.
Operation of added compensation (terminal 1) and override compensation (terminal
2) are invalid during decrease in input current.
The value before filtering is detected.
When input current decreases, frequency after filtering (average value) is retained.
Motor rotation direction can be restricted independently of 4mA input check setting.
Although PID operation is stopped when input current decreases, the X14 signal
remains on. (PID operation is valid.)
Even if input current decreases when undervoltage or power failure occurs, the motor
stops according to the setting of power-failure deceleration stop function
When input current decreases, traverse operation is performed using retained
frequency as reference.
When the switchover function is operated, frequency is the same as that of the
retained frequency.
Note that if 4mA input is made invalid once in switchover mode, the frequency is not
retained next time.
275
Refer to page
Refer to page 275
Operation (Pr. 573 = 1)
Refer to
page
151
160
162
225
164
261
278
280
299
348
258
369
301