Burkert Type 8630 Manuel d'utilisateur télécharger pdf (Page 66)

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OPERATION AND CONTROLLER FUNCTIONS

Normalized position

setpoint [%]

(CMD)

Entering the freely programmable characteristic

The characteristic is defined via 21 fixed points distributed evenly over the 0...100 % range of the

position setpoint. They are separated by 5 %. Each fixed point may be allocated to a freely selectable

stroke (setting range 0...100 %). The difference between two adjacent values of stroke may not exceed

20 %.

To enter the point on the characteristic (values of the function), first select the menu item CHR FREE.

After pressing the MANUAL/AUTOMATIC key, the first fixed point is displayed (0 %). Next to it is the

value of the function (initially 0 %).

With the arrow keys, set a value of the function between 0 and 100 %. After pressing the MANUAL/

AUTOMATIC key, the next fixed point is displayed, etc. Finally, press the MANUAL/AUTOMATIC key to

confirm the value of the function belonging to the last fixed point (100 %). The display returns to the

menu item

CHARACT

Normalized valve stroke [%] (POS)

For positioning applications of control systems, special

requirements are usually made on the shape of the

characteristic, e.g. linearity. For this reason it is

sometimes necessary to correct its shape in a suitable

manner.

For this purpose, a transfer member is provided in the

TOP Control Continuous which realizes different

characteristics. These are used to correct the

operation characteristic.

The equipercentile characteristics 1:25, 1:33, 25:1,

33:1 and 50:1 and a linear characteristic may be set.

Furthermore, it is possible to freely program a

characteristic via fixed points or have it calibrated

automatically.

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Burkert Type 8630 Manuel d'utilisateur Page 66