Mitsubishi Electric FR-F800 Series Instruction Manual page 182

 Keeping the motor speed constant when the load fluctuates (speed
control gain)
Pr.
Speed control gain
89
(Advanced magnetic flux
G932
vector)
569 Second motor speed
G942 control gain
• Use Pr.89 to keep the motor speed constant during variable load operation.
(This parameter is useful to adjust the motor speed.)
 Driving two motors under Advanced magnetic flux vector control
• Turning ON the Second function selection (RT) signal enables the second motor operation.
• Set a second motor in Pr.450 Second applied motor. (In the initial setting, "9999" (no second applied motor) is selected.
Refer to page
Applied motor
Motor capacity
Number of motor poles
Speed control gain (Advanced magnetic flux vector) Pr.569
NOTE
• The RT signal is the Second function selection signal. The RT signal also enables other second functions. (Refer to
The RT signal is assigned to terminal RT in the initial status. Set "3" in one of Pr.178 to Pr.189 (Input terminal function
selection) to assign the RT signal to another terminal.
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) may affect the other functions.
Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.71, Pr.450 Applied
Pr.800 Control method
Downloaded from ManualsNet.com
Initial
Name
value
0% to 200%
9999
9999
0% to 200%
9999
9999
Speed
379.)
Function
motorpage 379
selectionpage 177
search engine
Setting
range
Makes adjustments to keep the motor speed constant during variable load
operation under Advanced magnetic flux vector control. The reference
value is 100%.
The gain set by Pr.71. (The gain set in accordance with the motor.)
Makes adjustments to keep the second motor speed constant during
variable load operation under Advanced magnetic flux vector control. The
reference value is 100%.
The gain set by Pr.450. (The gain set in accordance with the motor.)
RT signal-ON (second motor)
Pr.450
Pr.453
Pr.454
Description
RT signal-OFF (first motor)
Pr.71
Pr.80
Pr.81
Pr.89
5. PARAMETERS
5.2 Control method
1
2
3
4
5
6
7
8
9
10
page 377.)
181