FMS CMGZ100, Руководство по эксплуатации

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Operating Manual CMGZ100
8
6 Operating the PID controller
6.1 Setting of the basic controller behaviour
Depending on this setting, a feedback signal that is greater than the reference (negative error) creates a positive
output signal (Jumper X22, pos) or a negative output signal (Jumper X23, neg). The setting required depends
whether the application is a winder or unwinder or in the case of a line drive whether the controlled drive is
before or after the tension measuring roller.
Danger:
Make sure the Tension Controller operates in the correct direction! If the Tension Controller operates
the wrong way, the drive tends to run immediately with maximum speed, causing damage (i.e. material
cracking) or personal injury! Check the Tension Controller behaviour by measuring the output value before
power on the drive!
6.2 Overlaying the line speed
In the case of a line drive if there is a 10V-signal available that is proportional to the line speed one can improve
the dynamics of the Tension Controller. Feed that signal to terminals d20/d22. The Tension Controller uses this
signal as predictive output signal and adds the calculated tension control output signal.
The tension control loop then only has to correct the synchronisation errors. Jumper X24 has to be set to X25.
Resistor R54 (pins X30 and 31) determines the percentage of the control output. R54 is chosen 10k
Ω
as
standard giving 10%. The resistor value (in k
Ω
) gives the percentage.
With no line speed the Jumper has to be in position X24 to give exact 100%.
6.3 Internal/external tension reference
To use the internal potentiometer for the tension reference set Jumper X20. To use an external 100k
Ω
potentiometer set jumper to X21. Connect external potentiometer to d2/d4/d6
6.4 Determining the control Parameters
•
Connect control release to z12/d12
•
Check the operating direction of the Tension Controller
without power on the drive. To do this the sensors can
be loaded with a force near the reference and the output
signal can be checked with a voltmeter at z20. The
Tension Controller must be released for this check.
•
Turn potentiometer R6/R7/R8 anticlockwise
•
Release controller
•
Turn potentiometer R6 (Proportional) clockwise until
drive starts to oscillate. Turn back a little.
•
Turn potentiometer R7 (Integral) to the right until drive
starts to oscillate. Turn back a little.
•
If required for satisfying control results turn
potentiometer R8 (Derivative) clockwise until drive starts to oscillate. Turn back a little.
•
If a scope is used the following sketch might be helpful
Notice:
If the CMGZ100 has to control a winder or unwinder with varying bobbin diameters, the diameter of
the bobbin goes into the calculation of the controller coefficients. If the bobbin is full, the stability of the loop is
most critical as this is equal to a high control gain. A setting that allows stability ofver the whole range of the
diameter therefore has to be used at the largest diameter.
C431013e