Emerson Rosemount 3490 Series Reference Manual page 14

Control unit overview
January 2021
Figure 2-4: Typical Control Unit Displays
A
F
J
A. Program/Run App mode (locked padlock = Run App)
B. HART transmitter communicating (absent if Idle)
C. Relay (RL) status: O = De-energized,
D. PV of control unit
E. Bar graph of 4–20 mA output
F. Digital input status: O = Open,
G. HART transmitter allocated: Left vertical bar = Tx1; Right vertical bar = Tx2
H. HART transmitter communicating (1=Tx1, 2=Tx2)
I. Relay (RL) status: O= De-energized,
J. Totalizer 1
K. Totalizer 2 (daily total)
Restore the full PV display
After a period of keypad inactivity, the display automatically changes to the Large PV
Display. This shows only the control unit PV and display units, but in a larger character size
to facilitate easier viewing.
Procedure
To restore the Full PV Display, press the red (enter) button.
Note
The Large PV Display feature can be switched off using parameter P574.
14
B
Rosemount 3491
E D
G H
Rosemount 3492
Rosemount 3493
C
K I
‣ = Energized, A = Alarm, S = Sampler, T = Totalizer
‣ = Closed
‣ = Energized, A = Alarm, S = Sampler, T = Totalizer
Reference Manual
00809-0100-4841
Emerson.com/Rosemount