Samson 3730-5 - Operator controls and readings; Readings on display

6 Operator controls and
readings
Rotary pushbutton
The rotary pushbutton is located underneath
the front protective cover.
The positioner is operated on site using the
rotary pushbutton:
Turn to select codes and values.
Press to confirm setting.
Slide switch AIR TO OPEN or AIR TO CLOSE
4
AIR TO OPEN applies when the increas
-
ing signal pressure opens the valve
4
AIR TO CLOSE applies when the increas-
ing signal pressure closes the valve
The signal pressure is the air pressure at the
output of the positioner which is transferred
to the actuator.
For positioners with an attached reversing
amplifier for double-acting rotary actuators
(section 4.5): switch position AIR TO OPEN.
Volume restriction Q
The volume restriction is used to adapt the
air delivery to the actuator size. Two fixed
settings are possible depending on how the
air is routed at the actuator:
4
For actuators smaller than 240 cm² with
a loading pressure connection at the side
(Type 3271-5), set restriction to MIN
SIDE.
4
For a connection at the back (Type
3277-5), set restriction to MIN BACK.
4
For actuators 240 cm² and larger, set to
MAX SIDE for a side connection and to
MAX BACK for a connection at the back.
Readings on display
Icons appear on the display that are as
-
signed to parameters, codes and functions.
Operating modes:
Manual mode (MAN), section 8.2.1
Automatic mode (AUTO), section 8.2.1
Fail-safe position (SAFE), section 8.2.2
4
Bar elements:
In manual and automatic modes,
the bars indicate the system deviation
that depends on the sign (+/–) and the
value. One bar element appears per 1 %
system deviation.
If the device has not yet been initialized,
the icon blinks on the display and the
lever position in degrees in relation to
the longitudinal axis is indicated. One
bar element corresponds to approxi-
mately a 5° angle of rotation.
If the fifth bar element blinks (reading
> 30°), the permissible angle of rotation
has been exceeded. Lever and pin posi-
tion must be checked.
4
Status alarms
: Maintenance alarm
: Maintenance required/Maintenance
demanded
These icons indicate that an error has oc
-
curred.
A classified status can be assigned to
each error. Classifications include “No
message”, “Maintenance required”,
“Maintenance demanded” and “Mainte
-
nance alarm“ (see section 8.3).
4
Configuration enabled
This indicates that the codes marked with
an asterisk (*) in the code list (section
17.1) are enabled for configuration (see
section 8.1).
50 EB 8384-5 EN
Operator controls and readings
S