Burkert Type 8635 User Manual

Page 68

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66 - 8635

PERATING AND

ONTROLLER

UNCTIONS

CUTOFF

Tight-closing function for positioners

Factory setting:

CUT

= 0 %;

CUT

= 100 %

This function causes the valve to close tight outside the control range. Enter here the limits in % for the
position setpoint (CMD) or for the process setpoint (SP) with activated PID controller (

S/HART only),

outside which the actuator is to be completely pressurized or exhausted, respectively. Opening or
resumption of control occurs with a hysteresis of 1 %.

When the process valve is in the tight-closing region, a flashing MIN or MAX symbol appears on the
display.

Tight-closing threshold exhaust (0 = inactive);
setting range: 0 ... 25 %

Tight-closing threshold pressurize (100 = inactive);
setting range: 75 ... 100 %

Setting range: 75 ... 100 %

Setting range: 0 ... 25 %

Valve stroke [%]
(POS)

Position setpoint [%]
(CMD)

XXX

CUTOFF

CUT XX

CUT XXX