Emerson Process Management 5300 Appendix J Analog-Input Block, Figure J-1. Analog-Input Block

Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

Appendix J Analog-Input Block

Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page J-3

Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page J-4

Signal Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page J-5

Block Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page J-6

Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page J-6

Alarm Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page J-7

Advanced Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page J-8

Configure the AI Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . page J-9

Figure J-1. Analog-Input Block

AI

OUT_D

OUT

OUT=The block output value and status

OUT_D=Discrete output that signals a selected alarm condition

The Analog Input (AI) function block processes field device measurements and makes them available to other function blocks. The output value from the AI block is in engineering units and contains a status indicating the quality of the measurement. The measuring device may have several measurements or derived values available in different channels. Use the channel number to define the variable that the AI block processes.

The AI block supports alarming, signal scaling, signal filtering, signal status calculation, mode control, and simulation. In Automatic mode, the block’s output parameter (OUT) reflects the process variable (PV) value and status. In Manual mode, OUT may be set manually. The Manual mode is reflected on the output status. A discrete output (OUT_D) is provided to indicate whether a selected alarm condition is active. Alarm detection is based on the OUT value and user specified alarm limits. Figure J-2 on page J-4illustrates the internal components of the AI function block, and Table J-1lists the AI block parameters and their units of measure, descriptions, and index numbers.

J-1