Rosemount 3051S
Reference Manual
Advanced Features
MULTIPLE ANALOG INPUT (MAI) FUNCTION BLOCK
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| OUT_1 |
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| OUT_2 |
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| MAI |
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| OUT_5 |
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| OUT_6 |
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| OUT_7 |
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| OUT_8 |
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Out1 = The block output value and status for the first channel.
The AI Function Block provides added capability through the addition of the following parameters:
ALARM_TYPE
ALARM_TYPE allows one or more of the process alarm conditions detected by the AI function block to be used in setting its OUT_D parameter.
OUT_D
OUT_D is the discrete output of the AI function block based on the detection of process alarm condition(s). This parameter may be linked to other function blocks that require a discrete input based on the detected alarm condition.
The Multiple Analog Input (MAI) function block has the ability to process up to eight field device measurements and make them available to other function blocks. The output values from the MAI block are in engineering units and contain 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 numbers to define the variables that the MAI block processes.
The MAI block supports signal scaling, signal filtering, signal status calculation, mode control, and simulation. In Automatic mode, the block’s output parameters (OUT_1 to OUT_8) reflects the process variable (PV) values and status. In Manual mode, values may be set manually. The Manual mode is reflected on the output status. The MAI block parameters and their units of measure, descriptions, and index numbers are listed.
Figure
Function Block Timing Diagram
OUT (mode in man) |
OUT (mode in auto) |
PV |
63% of Change |
FIELD_VAL |
Time (seconds)
PV_FTIME
Block Errors
Table
