Burkert Type TAT002 Manual de usuario descargar pdf (Pagina 11)

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Starting from the measured temperature Ta, the set-value is increased in steps

by dSl, but the SOFT-Start will only begin when Ta is outside the drb range:

Dynamic set-value = Ta + dSI

The clock time indicates with dSt when the dynamic set-value is increased by

dSl.

The dynamic set-value is set to Set-value 1 if the amount dynamic

set-value - Set-value < drb:

If | current dynamic set-value - set-value 1 | > drb,

automatic default: Dynamic set-value = Set-value 1

The SOFT-Start is ended.

If the measured temperature of the belt exceeds or falls below drb, the SOFT-

Start starts again.

2.5 Proportional control

In the case of unsatisfactory controller results with factory parameters, we

recommend that you proceed as follows:

1. Enter the switch hysterisis mode for Output 1 (Ft = 0)

2. Set Set-value 1 to a value that will not endanger the installation though

excessive vibration, e.g., 10% below working temperature.

3. Set the switch hysterisis setting Par. Hy1) to 3 % of the working

temperature (Set-value 1).

4. Start the system and wait until the vibration remains constant.

5. Evaluate (poss. using a plotter) the values Tp and dT

(see diagram)

6. Calculate the parameters Pb, Int, dEt, Cyt from these values -

as follows:

Pb = 2 x dT

Int = Tp / 2

dEt = Tp / 8

Cyt = Tp / 20

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Burkert Type TAT002 Manual de usuario Pagina 11