OMNI 4000/7000 Operations and Maintenance Guide
– Rev F
6-25
Front Panel Operations
2.
a. With
Manual Valve?
highlighted,
press the
OK
key to open the option
field.
b. Scroll down to select
Yes
, and press
OK
again.
Even if the
Local Setpoint
is set to
Yes
on this screen, you are still in
Automatic
Mode
if the
Manual Value?
is set to
No
. The
Manual Value?
must be set to
Yes
to
enter
Manual Mode
.
3.
You are now in
Manual Control
.
a. Scroll down to highlight
Manual
Valve %
and press
OK
.
b. Adjust the percentage that the valve is
left open, as needed.
c. When finished, press
OK
.
4.
To return to
Automatic Control
, highlight
and select
Manual Valve?
again, and
select
No
.
Local and Remote Setpoints
The PID control loop can be configured to accept either a Local Setpoint or a Remote Setpoint
value for the Primary Controlled variable. The Remote Setpoint is derived from a Modbus write or
an analog input (usually 4
–20 mA). This input is scaled in engineering units.
You must configure both zero (4mA) and Full Scale (20mA) values. The 4
‒20 mA
scaling of this input determines the scaling of the controlled variables.
