Energy Savings; Accel/Decel Time Settings - YASKAWA E7 Drive User Manual

b5-27 PI Snooze Feedback Level
This is a second method of initiating the Snooze Function. If the PI feedback level exceeds the PI Snooze Feedback Level (b5-
27), then the Drive output shuts off. Once the PI feedback drops below the PI Snooze Deactivation Level (b5-24) then normal
Drive and PI operation return.
b5-28 PI Feedback Square Root Function Activation
If b5-28=1, the square root of the PI feedback is compared to the PI Setpoint in order to determine appropriate Drive output to
properly regulate the system. This is helpful in cases where the measured feedback is pressure but the PI loop needs to regulate
flow.
b5-29 PI Square Root Gain
A multiplier applied to the square root of the feedback.
b5-30 PI Output Square Root Monitor Selection
If the PI Function is regulating the flow of a closed loop system by using a pressure feedback, it may be convenient to view the
square root of the PI output using monitor U1-37.

Energy Savings

b8-01 Energy Savings Selection
When the Energy Savings function is enabled (b8-01=1), the Drive reduces the output voltage to the motor below the voltage
value specified by the programmed V ratio whenever the motor load is light. Because torque is reduced during this voltage
reduction, the voltage returns to the specified voltage values when the load returns. The energy savings is realized through
improved motor efficiency. A motor is most efficient when it is fully loaded (e.g. slipping the most). Reduced output voltage
increases rotor slipping even with a light load.

Accel/Decel Time Settings

C1-01 Acceleration Time 1
C1-02 Deceleration Time 1
C1-01 (Acceleration Time 1) sets the time to accelerate from zero to maximum speed (E1-04). C1-02 (Deceleration Time 1)
sets the time to decelerate from maximum speed to zero. C1-01 and C1-02 are the factory default active accel/decel "pair".
Another accel/decel pair (C1-03 and C1-04) exists that can be activated by a multi-function digital input (H1-0x=7), or
specified by a switch over point (C1-11).
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