Pid For Speed Control - Danfoss VLT 5000 Series Instruction Manual

PID for speed control

Below are given a couple of examples of programming
of VLT 5000 PID speed control.
175ZA451.10
The following must be programmed in order shown - see explanation of settings in the Operating Instructions:
Function:
Activation of process controller
Feedback signal
Terminal 32
Terminal 33
Minimum feedback
Maximum feedback
Reference
Terminal 53, min. scale
Terminal 53, max. scale
Minimum reference
Maximum reference
Min. speed
Max. speed
Proportional gain
Integration time
Differentiation time
MG.51.C5.22 - VLT is a registered Danfoss trademark.
A conveyor belt that carries heavy items must be main-
tained at a regular speed, which is set by means of a
potentiometer within the range of 0-1500 rpm, 0-10
Volts. The speed selected must be kept constant and
the integrated PID speed controller is to be applied.
This is a case of normal control, which means that
when the load increases, the power supplied to the
conveyor belt motor increases in order to keep the
speed constant. Correspondingly, when the load falls,
the power is reduced.
The feedback used is an encoder with a resolution of
1024 pulses/rev. push-pull.
1.
2.
3.
Parameter no. Setting
100 Speed control, closed loop
314 Feedback signal
306 Encoder feedback, input B
307 Encoder feedback, input A
414 0 rpm
415 1650 rpm (max. ref. + 10%)
308 Reference (factory setting)
309 0 Volt (factory setting)
310 10 Volt (factory setting)
204 0 rpm
205 1500 rpm
201 0 Hz
202 75 Hz
417 Application-dependent
418 Application-dependent
419 Application-dependent
®
VLT 5000 Series
Start/Stop
Speed reference 0-1500 rpm, 0-10 Volts
Encoder 1024 pulses/rev. push-pull.
Data value no.
[1]
[2]
[24]
[25]
[1]
175