GA800, FP605, GA500, A1000, V1000, or U1000 drives have the ability to automatically switch acceleration and deceleration times at a specific frequency level set in parameter C1-11. Refer to the table below for the acceleration and deceleration settings based on Motor 1 / Motor 2 selection.

C1-11 Accel/Decel Switch Frequency	Motor 1		Motor 2
	Acceleration	Deceleration	Acceleration	Deceleration
Less than the C1-11 Setting	C1-07 ( Accel Time 4)	C1-08 ( Accel Time 4)	C1-07 ( Accel Time 4)	C1-08 ( Accel Time 4)
Greater than the C1-11 Setting	C1-01 ( Accel Time 1)	C1-02 ( Accel Time 4)	C1-05 ( Accel Time 3)	C1-06 ( Accel Time 3)

For example, using Motor 1 to ramp up from 0Hz to 45Hz in 15 seconds and 45Hz to 60Hz in 25 seconds, set C1-11 = 45Hz to specify the switching frequency then calculate the proper C1-07, C1-01, C1-02, and C1-08 values.

The acceleration and deceleration times are scaled from 0Hz to E1-04. Therefore, the equations below are needed to calculate the desired acceleration and deceleration times based on C1-11. If necessary, use the calculator (Excel spreadsheet) in the attachment section. Refer to the diagram and follow the steps below to setup an automatic switching of acceleration and deceleration times based on a specific frequency level.

1. Verify parameter E1-04 is set for the max frequency.
   • Note: E1-04 is set to "60Hz" by default. This parameter is not used to set an upper limit.
2. Set parameter C1-11 to the frequency level at which the accel/decel rate should change.
   • Example: Set C1-11 = 45hz.
3. Set parameters C1-01 (Accel Time 1), C1-02 (Decel Time 1), C1-07 (Accel Time 4), and C1-08 (Decel Time 4) for Motor 1 (default).
   • Note: If applicable when using Motor 2, set C1-05 (Accel Time 3), C1-06 (Decel Time 3), C1-07 (Accel Time 4), and C1-08 (Decel Time 4).

Example

The drive needs to accelerate from 0Hz to 45Hz in 15 seconds and from 45Hz to 60Hz in 25 seconds and decelerate at the same rates and frequencies. Set the following:

• E1-04 = 60hz
• C1-11 = 45Hz
• C1-07 = 20s
• C1-01 = 100s
• C1-02 = 100s
• C1-08 = 20s