7 SG9H 70 en
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4
LOCAL USER INTERFACE (LUI)
The local user interface may be used to monitor the device
behaviour as well as configuring and commissioning the
controller during installation and normal operation. The
local user interface consists of two row LCD and four button
keypad interface. There are also custom graphical charac-
ters for special conditions.
4.1
Measurement monitoring
When the device is powered, it enters the measurement
monitoring view. The following measurements may be
viewed from the display. The Table 4 identifies the default
unit and also optional unit of the measurement.
If the unit selection is altered from the FieldCare software to
US units, the pressure default unit will automatically be
changed to psi and temperature unit to Fahrenheit.
The active unit may be changed by pressing the
?
key
constantly. The display shows the current unit selection on
the top row of the display. You may change the selection by
pressing
+
or
-
while keeping the
?
key pressed down.
When the buttons are released the current selection will be
activated.
If the device has been idle for 1 hour, and there is no user
activity on the local user interface, the measurements will
start scrolling on the display. This enables the user to view
all the measurements through the window of the main
cover.
4.2
Guided start-up
Guided startup offers a fast view of the most critical param-
eters of the SwitchGuard controller, actuator and valve con-
figuration. After verifying the parameters the valve travel
calibration is recommended. The guided start-up is entered
by pressing the
=
and
?
keys simultaneously.
The configuration parameters are listed in following order,
see explanation from 4.5:
Valve type
VTYP
Actuator type
ATYP
Maximum Speed
MAXS
Positioner fail action
PFA
Valve dead angle
A0
Stroke Time Open
STOP
Stroke Time Close
STCL
If you modify any of the parameters you will also need to
calibrate and tune the device. See 4.6 for detailed descrip-
tion.
Fig. 8
Local user interface (LUI)
Table 4
Default / optional units of measurements
Measurement
Default unit
Optional unit
valve position
Percentage of full scale
Angle, where 0 % refers
to 0 (angle)
current loop
setpoint
mA
Percentage of full scale
actuator pressure
difference
bar
psi
supply pressure
bar
psi
device
temperature
°Celsius (C)
°Fahrenheit (F)
Fig. 9
Measurement unit change
— continuous push
— brief push
