91
Auxiliary functions
Type 8792, 8793 REV.2
16.1.4
CUTOFF –
Sealing function
This function causes the valve to be sealed outside the control range.
To do this, the limits for the set-point position (
CMD
) are entered as a percentage from which the actuator is
fully deaerated or aerated.
Controlled operation 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.
Only for Type 8793:
Here you can select the set-point value to which the sealing function is to apply:
Type PCO
Process set-point value (
SP
)
Type XCO
Position set-point value
(CMD
)
If
Type PCO
was selected, the limits for the process set-point value (
SP
) are entered as a percentage with
reference to the scaling range.
Factory setting:
Min = 0%
;
Max = 100%;
CUT type = Type PCO
Enter
CUTOFF
as follows:
→
Press
MENU
for 3 s. Switching from process level
setting level.
→
/ Select
CUTOFF
. (To do this, the auxiliary function must be incorporated into the main menu).
→
Select
ENTER
. Menu options of
CUTOFF
are displayed.
→
Select
INPUT
.
The
Min 0%
input screen for inputting values is opened.
→
/ Enter value: Enter value for the selected node.
+
Increase value
-
Reduce value
→
Select
INPUT
.
The
Max 100%
input screen for inputting values is opened.
→
/ Enter value: Enter value for the selected node.
+
Increase value
-
Reduce value
→
Select
OK
. Acknowledge input and return to the
CUTOFF
submenu.
* If the submenu is left by pressing the
ESC
key, the value remains unchanged.
Or for Type 8793:
→
Select
INPUT
.
The
CUT type*
input screen for inputting values is opened.
*
Available for Type 8793 only
→
Select
SELEC
. The
Type PCO
input screen for inputting the selection of the process set-point
value.
→
Select
SELEC
. The
Type XCO
input screen for inputting the selection of the set-point position.
→
Select
EXIT
. Return to the
CUTOFF
menu.
→
Select
EXIT
. Return to the main menu (MAIN).
english
Summary of Contents for 8792
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