Droop Control; Pulse Train I/O; Operation Command Source And Speed Command Source During Communication Operation - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
286 to 288

Droop control

Magnetic flux Magnetic flux Magnetic flux
Pr.286 Droop gain
Pr.288 Droop function activation selection
This function is designed to balance the load in proportion to the
load torque to provide the speed drooping characteristic.
This function is effective for balancing the load when using
multiple inverters
Setting
Pr.
Range
Number
0
Droop control is invalid
(initial value)
286
Set the drooping amount at the rated torque as a
0.1 to 100%
percentage with respect to the rated motor frequency.
Set the time constant of the filter applied on the torque
287 0.00 to 1.00s
amount current.
Advanced magnetic flux
vector control
0
(initial value),
10
Droop control is not
exercised during
acceleration/
288
deceleration.
Droop compensation
amount is determined
1, 11
using the rated motor
frequency as reference.
2
Droop control
This control is valid when a value other than "0" is set in Pr.286 under
advanced magnetic flux vector control, real sensorless vector
control and vector control.
The maximum droop compensation frequency is 120Hz.
-100%
Pr.
Pr.
291, 384 to 386

Pulse train I/O

Pr.291 Pulse train I/O selection
Pr.385 Frequency for zero input pulse
The inverter speed can be set by inputting pulse train from
terminal JOG.
In addition, pulse train can be output as open collector from
terminal FM.
Synchronous speed operation of inverters can be performed by
combining pulse train I/O.
Pr.291 Setting
0
JOG terminal
(initial value)
1 Pulse train input
10 JOG terminal
11 Pulse train input
20 JOG terminal
21
Pulse train input
100
* The inverter outputs the signal input as pulse train as it is regardless of the
Pr.54 setting.
65
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Sensorless Sensorless Sensorless
Vector Vector Vector
Pr.287 Droop filter time constant
Description
Real sensor less vector /
vector control
Droop control is not
exercised during
acceleration/deceleration.
(When Pr.288 = 10, droop
compensation amount is
determined using the
motor speed as
reference.)
Droop control is always
exercised during operation.
(with 0 limit)
(When Pr.288 = 11, droop
compensation amount is
determined using the
motor speed as
reference.)
Droop control is always
exercised during
operation.
(without 0 limit)
Frequency
Droop compensation
frequency
Droop
gain
Torque
0 100%
Pr.384 Input pulse division scaling factor
Pr.386 Frequency for maximum input pulse
Input Output
FM output
FM output
Pulse train output
(50%Duty)
Pulse train output
(ON width is always same)
Pulse train output
(ON width is always same)*
Change the frequency at pulse train input.(Pr.385, Pr.386)
60Hz
Bias Bias Bias
(Pr.385) (Pr.385) (Pr.385)
Input pulse(pps)
0
Calculation method of input pulse division scaling factor (Pr.384)
Maximum number of input pulses (PPS)=Pr.384
(maximum permissible pulses=100kpps)
When Pr.419 Position command source selection ="2" (conditional pulse
train position command), JOG terminal serves as conditional
position pulse train input terminal regardless of the Pr.291 Pulse train
I/O selection setting.
Pr.
Pr.
292, 293
Refer to the section about Pr.61.
Pr.
Pr.
294
Refer to the section about Pr.261.
Pr.
Pr.
299
Refer to the section about Pr.57.
Pr.
Pr.
331 to 337
Refer to the section about Pr.117.
Pr.
Pr.
338, 339, 550, 551
Operation command source and speed command
source during communication operation
Pr.338 Communication operation command source
Pr.550 NET mode operation command source selection
Pr.551PU mode operation command source selection
When the RS-485 terminals or communication option is used, the
external operation command and speed command can be made
valid. Operation command source in the PU operation mode can
be selected.
Pr. Setting
Number Range
0
Operation command source communication
(initial value)
338
1 Operation command source external
0
Speed command source communication
(initial value)
Speed command source external (Frequency setting
1 from communication is invalid, terminal 2 and 1 setting
339
from external is valid)
Speed command source external (Frequency setting
2 from communication is valid, terminal 2 and 1 setting
from external is invalid)
0 Communication option is valid
1 RS-485 terminals are valid
550* Automatic recognition of the communication option
9999 Normally, the RS-485 terminals are valid. When a
(initial value)
communication option is mounted, the communication
option is valid.
Select the RS-485 terminals as the PU operation mode
1
control source
2 Select the PU connector as the PU operation mode
551*
(initial value) control source
Select the USB connector as the PU operation mode
3
control source
* Pr.550 and Pr.551 are always write-enabled.
Pr. Pr.
340
Refer to the section about Pr.79.
Pr.
Pr.
341 to 343
Refer to the section about Pr.117.
Initial value
Gain Gain Gain
( ( ( ) ) )
100
(Maximum pulse)
×
400
Pr.339 Communication speed command source
Description