Burkert Type 8635 - Manual (Page 68)

66 - 8635
O
PERATING AND
C
ONTROLLER
F
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