26
This setting allows the maximum
cut-off pressure in a normally closed
actuator while in mid-travel between
the closed and open electrical limits
while opening to be set. If the value is
set to 00, the pressure-off value from
OP is used.
50
m
50
m
P?
k
PC
k
bt
k
Pt
k
Ft
m
Cr
m
C2
k
C3
m
CP
k
cP
k
OP
k
oP
m
LC
k
LO
m
50
To change the function press the
+
or
-
key until the required setting is
displayed.
PRESS THE
KEY
.
The displayed option will flash (stored),
indicating that it has been set.
If the actuator fails to complete
a closed or open valve operation
due to the set pressure being
reached, it may indicate a valve
and/or process problem or change.
It is the responsibility of the user
to ensure the valve and process
conditions are within the specified
operational limits before increasing
the pressure value.
Open Pressure at Mid
oP
Open Pressure
at Mid
0%
Torque
To set the closed and open electrical
limits correctly, the actuator should
be moved to both the closed and
open mechanical limits and the
positions stored. The actuator will then
automatically scale in 2% from each
end to set the electrical limits.
The number shown in the top right of
the display screen when in either LC
or LO, is the percentage of full scale
read directly back from the positional
feedback device.
When at either the closed or open limit,
if the number on the screen is between
00 - 05 or 95 - 99, the actuator will
indicate a PO fault and will not operate,
its assumes that there is a problem
with feedback device. If this is the case
then the feedback device will require
adjustment.
Setting the Closed / Open Limit
