Rockwell Automation 1333 Drive, 3/4-5HP, 230-575V Series D - Manual (Page 78)

Operation and Programming
Chapter 5
5-35
Auxiliary Accel and Decel Settings
Auxiliary Accel and Decel Times are enabled or disabled by Parameters 19
and 20. Individual Accel and Decel Parameter settings are selected by
setting switches S1, S2 and/or S3 as shown in Parameters 19 and 20
Parameters 36 , 38 and 40 -- Accel Times 2, 3 and 4
Units = Seconds
Range = 000.1/1600
Factory Setting = 005.0
Each auxiliary accel time determines a time that it will take the drive to
accelerate over a 60 Hz frequency change. From 0 to 0.5 Hz, any auxiliary
accel rate set is effectively zero. From 0.5 Hz to maximum output
frequency, the accel rate set by each auxiliary accel time will remain
constant. For each accel time, the total time it will take the drive to
accelerate from an initial frequency to a new command frequency is:
Total time = (New Command Frequency – Initial Frequency)
×
(Accel
Time)
÷
60.
From 000.1-1000 seconds, these parameters set the values of Accel Time 2,
3 and 4 in 0.1 second increments.
From 1000-1600 seconds, these parameters set the value of Accel Time 2,
3 and 4 in 1 second increments.
Parameters 37 , 39 and 41 -- Decel Times 2, 3 and 4
Units = Seconds
Range = 000.1/1600
Factory Setting = 005.0
Each auxiliary decel time determines a time that it will take the drive to
decelerate and ramp-to-stop over a 60 Hz change in frequency. From 0.5 to
0 Hz, the accel rate is non-linear and set by either DC injection braking or
the DC dynamic brake if it is installed. From maximum output frequency
to 0.5 Hz, the accel rate set by Parameter 2 will remain constant. For each
decel time, the total time it will take the drive to decelerate from an initial
frequency to a new command frequency is:
Total time = (New Command Frequency – Initial Frequency)
×
(Accel
Time)
÷
60.
From 000.1-1000 seconds, these parameters set the values of Decel Time 2,
3 and 4 in 0.1 second increments.
From 1000-1600 seconds, these parameters set the value of Decel Time 2,
3 and 4 in 1 second increments.