Mitsubishi Electric 800 Series Instruction Manual page 624

Droop control break point setting (Pr.994, Pr.995)
• By setting Pr.994 and Pr.995, break point (1 point) can be set up for the droop compensation frequency. Setting a break
point allows the inverter to raise the droop compensation frequency for light-load (no load) operation without raising it for
heavy-load operation.
Increased amount of the
droop compensation
frequency
Droop
compensation
Droop compensation
reference
frequency
-100%
NOTE
• Droop break point function is disabled in one of following conditions. (Linear compensation by Pr.286 will be performed.)
Pr.995 = "100% (initial value)"
Pr.286 <Pr.994

Pr.994 Pr.995
Setting multiple droop control types (Pr.679 to Pr.683)
• When the second droop control is set, two droop control types can be switched. Turning ON the second function selection
(RT) signal enables the second droop control.
NOTE
• The RT signal is a second function selection signal. The RT signal also enables other second functions.
• The 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.1 Maximum frequency page 329
Pr.178 to Pr.189 (Input terminal function selection)
Frequency
Droop break point gain
(Pr.994)
Droop break point torque
(Pr.995)
0

Pr.286 / 100%
page 415
Droop gain
(Pr.286)
Torque
100%
(G) Control parameters
623
PARAMETERS
5
GROUP
G