Becker Digital Natural Gas Positioner Instruction Manual | 71
© 2022 Baker Hughes Company. All rights reserved.
Cycles 1,875
Control ❚ ❚ ❚
Feedback ❚ ❚ ❚
Deadband 1.5% ♦ N
CTRL = Using Digital Inputs
MAN = Under Manual Control
PGM = Under Program Control
Variable length bar indicating current
between 4-20 mA
Example:
= 4 mA
❚ ❚ ❚
= 12 mA
❚ ❚ ❚ ❚ ❚ = 20 mA
A = Automatic, Analog
a = Automatic, Digital
M = Manual, Analog
m = Manual
P = Program Control
S = Standby
- = Idle
d = Decreasing Current
D = Decreasing Current, Bypass Limit
i = Increasing Current
I = Increasing Current, Bypass Limit
H = Halted
W = Waking (Solenoids on, Not Yet Moving
M = Moving
C = Coasting
= Full Range, Standard
= Split Range, Standard
= Full Range, Learned
♦ = Split Range, Learned
6. Software Functionality
This section discusses using the LCD interface to configure the positioner.
Run Time Screen
Current Loop Mode
The
Run-Time
screen contains all the real-time feedback data for the DNGP. The diagram below shows a
screenshot of a DNGP
Run-Time
screen. The boxes accompanying the diagram show all possible feedback
symbols and their meanings. In Current Loop Mode the DNGP accepts the standard 4-20 mA input and
energizes the solenoid to stroke the valve to the desired position. In this mode pressing the:
• RIGHT button increases the input current signal and manually moves the valve (the direction depends
on what positioner action is selected - when in manual mode).
• LEFT button deceases the input current signal and manually moves the valve - when in manual mode.
• UP and DOWN buttons increase and decrease the deadband, respectively, to adjust the sensitivity of
the positioner.
• ENTER button takes you to the Top Level Setup screen.
Minimum deadband value is 0.5%. Do not attempt to set deadband below this value.
