Mitsubishi Electric A800 Plus Series Function Manual page 134

Inertia compensation function operation selection (X111 to X113 signals)
• When the X111 signal is turned ON, an inertia compensation for the acceleration torque is started. For winding (power
driving), the torque command value is increased. For unwinding (regenerative driving), the torque command value is
decreased. The variation ratio is determined according to Pr.1418 Inertia compensation cushion time. When the X111
signal is turned OFF, the inertia compensation for the acceleration torque is stopped according to the Pr.1418 setting. The
Line speed acceleration (Y237) signal of the inverter connected to the intermediate shaft is input to the terminal to which
the X111 signal is assigned.
• When the X112 signal is turned ON, an inertia compensation for the deceleration torque is started. For winding (power
driving), the torque command value is decreased. For unwinding (regenerative driving), the torque command value is
increased. The variation ratio is determined according to Pr.1418 Inertia compensation cushion time. When the X112
signal is turned OFF, the inertia compensation for the acceleration torque is stopped according to the Pr.1418 setting. The
Line speed deceleration (Y238) signal of the inverter connected to the intermediate shaft is input to the terminal to which
the X112 signal is assigned.
Torque
Torque command
Rotation speed
X111
X112
Torque
Torque command
Rotation speed
X111
X112
• Use the X113 signal to switch the acceleration/deceleration time for inertia compensation.
X113 signal Acceleration time for inertia compensation
Pr.1414 First acceleration time for inertia
OFF
compensation
Pr.271 Second acceleration time for inertia
ON
compensation
• To use the X111 to X113 signals, set Pr.178 to Pr.189 (input terminal function selection) to assign the function of each
signal to an input terminal.
Pr.178 to Pr.189 setting
111 X111
112 X112
113 X113
ON
Example of winding (power driving)
ON
Example of unwinding (regenerative driving)
Signal name
Inertia compensation acceleration
Inertia compensation deceleration
Inertia compensation second acceleration/deceleration time
TENSION SENSORLESS TORQUE CONTROL
Tension sensorless torque control details
Inertia compensation (acceleration)
ON
Inertia compensation (acceleration)
ON
Deceleration time for inertia compensation
Pr.1415 First deceleration time for inertia
compensation
Pr.272 Second deceleration time for inertia
compensation
Function
Inertia compensation
(deceleration)
Time
Time
Inertia compensation
(deceleration)
Time
Time
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