Mitsubishi Electric 800 Series Instruction Manual page 151

 Keeping the motor speed constant when the load fluctuates (speed
control gain)
Pr.
89 Speed control gain
G932 (Advanced magnetic flux
vector)
569 Second motor speed control
G942 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 motor)" is selected. Refer
to page 351.)
Function
Applied motor
Motor capacity
Number of motor poles
Speed control gain (Advanced magnetic flux vector) Pr.569
NOTE
• The RT signal is a second function selection signal. The RT signal also enables other second functions. (Refer to
348.) RT signal is assigned to the terminal RT in the initial status. Set "3" in any 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
150
5. PARAMETERS
5.2 Control method
Name Initial
value
9999
9999
Speed
motorpage 351
selectionpage 145
Setting
range
0 to 200% Makes adjustments to keep the motor speed constant during variable
load operation under Advanced magnetic flux vector control.
The reference value is 100%.
9999 The gain set by Pr.71. (The gain set in accordance with the motor.)
0 to 200% Makes adjustments to keep the second motor speed constant during
variable load operation under Advanced magnetic flux vector control.
The reference value is 100%.
9999 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
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