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Figure 2-4: Typical Control Unit Displays
B
C
D
E
A
F
J
G H
K
I
Rosemount 3491
Rosemount 3492
Rosemount 3493
A. Program/Run App mode (locked padlock = Run App)
B. HART transmitter communicating (absent if Idle)
C. Relay (RL) status: O = De-energized,
‣
= Energized, A = Alarm, S = Sampler, T = Totalizer
D. PV of control unit
E. Bar graph of 4–20 mA output
F. Digital input status: O = Open,
‣
= Closed
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,
‣
= Energized, A = Alarm, S = Sampler, T = Totalizer
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.
Control unit overview
Reference Manual
January 2021
00809-0100-4841
14
Emerson.com/Rosemount
Summary of Contents for Rosemount 3490 Series
Page 4: ...4 ...
Page 8: ...Introduction Reference Manual January 2021 00809 0100 4841 8 Emerson com Rosemount ...
Page 16: ...Control unit overview Reference Manual January 2021 00809 0100 4841 16 Emerson com Rosemount ...
Page 36: ...Installation Reference Manual January 2021 00809 0100 4841 36 Emerson com Rosemount ...
Page 134: ...Getting started Reference Manual January 2021 00809 0100 4841 134 Emerson com Rosemount ...
Page 184: ...Additional features Reference Manual January 2021 00809 0100 4841 184 Emerson com Rosemount ...
Page 189: ...Reference Manual 00809 0100 4841 January 2021 Emerson com Rosemount 189 ...