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January 2021
Table 4-10: Auxiliary Functions for Relay Modes - Special Control Functions
Relay mode
Set points
Set point (PV)
Yes
Set Point (SV)
Yes
Set Point (TV)
Yes
Set Point (FV)
Yes
Assist
Yes
Stby Com-off
Yes
Stby Split-off
Yes
Digital Inputs
N/A
Sampler
N/A
Rate change
Yes
Off
N/A
Alarm
Yes
Hi/Lo Alarm
Yes
Totalizer
N/A
Fault
N/A
Custom
N/A
PV Limits
Yes
On
N/A
(1)
Option available on the Rosemount 3491 and 3492 only.
98
Auto
Energy saving
(1)
sequence
N/A
Yes
N/A
Yes
N/A
Yes
N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
(1)
Scum line
Pump down
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Emerson.com/Rosemount
Reference Manual
00809-0100-4841
(1)
Custom
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
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