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Type 8692, 8693
english
Start-up, operation
process controller Type 8693
4.2 CUTOFF
Sealing function for the position controller Type 8693
This function causes the valve to be sealed outside the control area.
This is where you input the limits for the position set-point value (CMD) as a percentage or for the process set-point value (SP)
as a percentage of the scaling range, from which the actuator is fully deaerated or aerated. Control mode opens or resumes at a
hysteresis of 1 %. If the process valve is in the sealing area, the message "CUTOFF ACTIVE" is indicated on the display.
Factory setting: Min= 0 %; Max = 100 %; CUT type = Type PCO
CUTOFF
Min 0 %
Max 100 %
EXIT
ENTER
INPUT
+
-
Min 0 %
OK
INPUT
+
-
Max 100 %
OK
*
*
Sealing threshold
Deaeration (0 = not active)
Adjustment range:
0 ... 25 %
Sealing threshold
Aeration (100 = not active)
Adjustment range:
75 ... 100 %
CUT type
ENTER
SELEC
Type PCO
Select process
set-point value
EXIT
Type XCO
Select position
set-point value
Fig. 21: Operating structure CUTOFF-8693
Changed values are not transferred into the memory (EEPROM) until the main menu (MAIN) is left.
Valve
stroke [%]
(POS)
Adjustable from 75 – 100 %
Set-point
value [%]
(CMD / SP)
Adjustable from 0 – 25 %
Fig. 22: Graph - CUTOFF - 8693
* If the sub-menu is left by pressing the selection key on the left (ESC), the value remains unchanged.
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