Emerson Process Management Rosemount 2410 Virtual Relay States, Virtual Relay Output, Source

Reference Manual

300530EN, Rev BA September 2012

Rosemount 2410

Virtual Relay States

There are three virtual relay states available:

Table C-1. 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

Table C-2. 2410 Relay Control Modes

Virtual Relay Output

The Virtual Relay Output setting determines whether the relays are active or disabled.

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.

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 2410 Tank Hub to the specific tanks, see the Raptor System Configuration Manual (Document no. 300510EN) for more information about configuration of the 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.

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.

Toggle Period

When the relay is in Toggle state it switches between On and Off at a rate defined by the Toggle Period.

Appendix C. Advanced Configuration C-7