Emerson Rosemount 3490 Series Reference Manual page 96

Getting started
January 2021
Relay safeguard options
Menu
Table 4-8: Relay Safeguard Parameters
Parameter
P413
P414
P415
P423 to P425
P433 to P435
P443 to P445
P453 to P455
Other relay modes
Table 4-9
Table 4-9: Relay Modes
Relay mode
None
Set point SV
Set point TV
Set point FV
Assist
Stby com off
Stdby split off
Digital Input 1
Digital Input 2
Sampler
RoC
96
SETUP → [CONTROLLER] → OUTPUT → RELAY → RELAY 1, RELAY 2, etc.
Description
RL1 Min On Defines the minimum time (minutes and seconds)
that relay RL1 will stay energized before de-
energising. This is an optional override (safeguard) to
allow sufficient time for connected equipment to
respond.
RL1 Max On Defines the maximum time (minutes and seconds)
that relay RL1 will stay energized before de-
energising. This is an optional override (safeguard) to
prevent overuse of connected equipment.
RL1 Min Off Defines the minimum time (minutes and seconds)
that relay RL1 will stay de-energized before
energising. This is an optional override (safeguard) to
avoid overuse of connected equipment.
P423 to P425 are the equivalents for relay RL2.
P433 to P435 are the equivalents for relay RL3.
P443 to P445 are the equivalents for relay RL4.
P453 to P455 are the equivalents for relay RL5.
is a list of all relay modes.
Purpose of relay mode
Relay is not used.
On/Off Point control using SV (D801).
On/Off Point control using TV (D802).
On/Off Point control using FV (D803)
Duty Assist, On/Off Point Control and Auto Sequence.
Duty Standby, Common Off and Auto Sequence.
Duty Standby, Split Off and Auto Sequence.
Relay energizes while Digital Input 1 (IN1) is active.
Relay energizes while Digital Input 2 (IN2) is active.
Relay outputs sampler pulses.
Relay is energized if the rate of change of the control unit
PV is out-of-limits.
Reference Manual
00809-0100-4841
Factory default
0:00 m:s
0:00 m:s
0:00 m:s
N/A
N/A
N/A
N/A
Auxiliary
functions
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
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