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Reference Manual

00809-0200-4801, Rev CA

July 2010

Rosemount 3051S

3-16

Advanced Features 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.

MULTIPLE ANALOG

INPUT (MAI) FUNCTION

BLOCK

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.

In the 3051S, the MAI function block is used to read the output statistical

values from the Advanced Diagnostics Transducer Block. The CHANNEL

parameter must be set to 11. The output values are the means and standard

deviations from all four Statistical Process Monitoring (SPM) Blocks.

In Automatic mode, the block’s output parameters (OUT_1 to OUT_8) reflect

the SPM- values and status. In Manual mode, values may be set manually.

The Manual mode is reflected on the output status.

See page 6-11 for further information on using the MAI block to trend

Statistical Process Monitoring data.

Block Errors

Table 3-6 lists conditions reported in the BLOCK_ERR parameter. Conditions

in bold are inactive for the MAI block and are given for reference.

Table 3-6. Block Error

Conditions

Out1 = The block output value and status

for the first channel.

OUT_1

MAI

OUT_2

OUT_3

OUT_4

OUT_5

OUT_6

OUT_7

OUT_8

Number Name and Description

0 Other

1 Block Configuration Error: the selected channel carries a measurement that is

incompatible with the engineering units selected in XD_SCALE, the L_TYPE

parameter is not configured, or WRITE_CHECK = zero.

2 Link Configuration Error

3 Simulate Active: Simulation is enabled and the block is using a simulated value in

its execution.

4 Local Override

5 Device Fault State Set

6 Device Needs Maintenance Soon

7 Input Failure/Process Variable has Bad Status: The hardware is bad, or a bad

status is being simulated.

8 Output Failure: The output is bad based primarily upon a bad input.

9 Memory Failure

10 Lost Static Data

11 Lost NV Data

12 Readback Check Failed

13 Device Needs Maintenance Now

14 Power Up

15 Out of Service: The actual mode is out of service.

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 239 240

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