25
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Business Park, Halifax, UK, HX1 5ND - +44 (0) 1422 647177
–
50* 0.005 = 0.25 seconds acceleration time.
NOTE
–
this calculation does not take the acceleration time before the PID is enabled, nor does it
include the PID delay time.
NOTE
–
This is a four-quadrant controller with no braking resistor mounted. This means that
motors with high inertia loads can regenerate energy as a voltage onto the Supply. Care must be
taken when decelerating quickly to ensure the voltage increase does not damage the PSU or
exceed the max voltage specification for the controller.
PID Delay (ms)
If the PID is enabled, the motor will typically startup as normal without the PID. Meaning, that the
motor start with a duty cycle set with the Min duty cycle parameter, then it will accelerate up
towards the Fixed Speed (%duty) parameter. Once the motor speed exceeds the Min Frequency (Hz)
parameter, the motor will stop accelerating, delay for the PID Delay (ms) time, enable the PID then
accelerate up at the PID Acc/Dec rate until the Fixed Speed (PID Hz) is reached.
This parameter is only used when the PID is enabled.
PID Enabled
A value of 0 = PID disabled, a value of 1 = PID is Enabled.
Changing this value when the motor is running will have no effect. The motor will need to be
stopped in order to enable or disable the PID.
PID Data Items
Data Item Number
Details
0
PID Enabled
–
0 = No, 1 = Yes
1
PID Demand Frequency
2
Actual Motor Frequency
3
Frequency Error
4
Proportional Term
5
Integral Sum Low
6
Integral Sum High
7
Integral Term Low
8
Integral Term High
9
PID Output
