Mitsubishi Electric 800 Series Instruction Manual page 595

(G) Control parameters
Vertical lift load applications (Pr. 14 = "2, 3")
• Set "2" when a vertical lift load is fixed as power driving load at forward rotation and regenerative load at reverse rotation.
• Pr. 0 Torque boost is valid during forward rotation, and torque boost is automatically changed to "0%" during reverse
rotation.
• Set "3" for an elevated load that is in the driving mode during reverse rotation and in the regenerative load mode during
forward rotation according to the load weight, e.g. counterweight system.
NOTE
• When torque is continuously regenerated as vertical lift load, it is effective to set the rated voltage in Pr. 19 Base frequency
voltage to prevent trip due to current at regeneration.
Switching applied load selection with a terminal (Pr.14 = "4, 5")
• It is possible to switch between for constant-torque load and for lift with RT signal or X17 signal.
• To input the X17 signal, set "17" in any of Pr.178 to Pr.189 (Input terminal function selection) to assign the function.
• Switching with RT signal will become disabled when X17 signal is assigned.
Pr.14 setting RT (X17) signal
ON
4
OFF
ON
5
OFF
NOTE
• 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 189 may affect other functions. Set parameters after confirming the
function of each terminal.
• Pr.14 will become enabled at the time of V/F control.
• Other second functions will become enabled when the RT signal is ON.
Parameters referred to
Pr.0 Torque boost page 589
Pr.3 Base frequency page 591
Pr.178 to Pr.182 (Input terminal function selection)
594
PARAMETERS
Pr.14 = 2
For vertical lift loads
At forward rotation boost...Pr.0 setting
At reverse rotation boost...0%
100%
Forward
rotation
Reverse
Pr.0 rotation
Base frequency
Output frequency (Hz)
Output characteristics
For constant-torque load (same as setting value "0")
For lift, boost at reverse rotation 0% (same as setting value "2")
For constant-torque load (same as setting value "0")
For lift, boost at forward rotation 0% (same as setting value "3")
page 415
Pr.14 = 3
For vertical lift loads
At forward rotation boost...0%
At reverse rotation boost...Pr.0 setting
100%
Reverse
rotation
Forward
Pr.0 rotation
Base frequency
Output frequency (Hz)