C.5.4 Virtual relay states
There are three virtual relay states available:
Table C-1: Rosemount 2410 Relay States
Virtual Relay State Description
Alarm In the Alarm state the relay is de-energized. Depending on how the relays
are connected, they will be either open or closed in the de-energized
state.
Note that a relay defined as Normally Open will be open in the Alarm
state.
If the relay is configured as Normally Closed it will be closed in the Alarm
state.
Normal In the Normal state the relay is energized.
Toggle The relay switches periodically between Normal and Alarm
The Virtual Relay Output setting determines whether the relays are active or disabled.
Table C-2: Rosemount 2410 Relay Control Modes
Virtual Relay Output Description
Disabled The relay function is turned off.
Relay 1/Relay 2 Specifies the actual relay that the Relay Output is connected to.
The Rosemount 2410 Tank Hub can be equipped with one or two
relays.
C.5.5 Source
Specifies the measurement variable that triggers the relay switching.
“Tank Name/Tank Position” refers to the tank position in the Rosemount 2410 tank
database. The tank database maps all devices connected to the Rosemount 2410 Tank
Hub to the specific tanks, see the Rosemount Tank Gauging System Configuration Manual
(Document no. 00809-0300-5100) for more information about configuration of the
Rosemount 2410 tank database.
Tank Parameter refers to the measurement variable that triggers the relay switching. For
example, Level, Delta_Level, Ullage or any other variable can be chosen as source.
C.5.6
Switch delay
This is the delay time for the relay to switch into alarm state, i.e. the amount of time it
takes for a relay to respond to an alarm. You can use this parameter to prevent the relay
from switching due to small temporary variations of the source signal. This may for
example occur if there is a turbulent product surface.
Advanced configuration Reference Manual
December 2019 00809-0100-2410
164 Reference Manual
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