Emerson Rosemount 3490 Series, Reference Manual

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