Rosemount 3095, Product Manual

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3-9
Level Controller Configuration
MODE SHED OPTION The Mode Shed option allows the Level Controller to maintain control
of the process loop in the event of measuring sensor failure.
The Model 3095 Level Controller continuously completes diagnostics of
the multi-variable sensor and the controller. If the diagnostics
determines that the level measurement is in a failed condition, the
controller allows the user to select a “mode shed,” directing the
controller to set the control element in a safe position. The Level
Controller will remain at the “mode shed” position until the failed
signal clears, or, until re-positioned by the user.
If the Level Controller determines that its ability to control the loop is
compromised, the unit immediately drives the hardware analog alarm
high or low, as selected by the user.