Mulitple Analog Input Function Block - Fisher FIELDVUEDVC6200f Instruction Manual

Instruction Manual
D103412X012
Multiple Analog Input Function Block
Overview
The Multiple Analog Input (MAI) function block (figure E‐24) 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.
Figure E‐24. Multiple Analog Input (MAI) Function Block
MAI
Out1 = The block output value and
status for the first channel
The MAI block supports mode control. In Automatic mode, the block's output parameters (OUT_1 to OUT_8 [8
through 15]) reflects the process variable (PV) values and status. In Manual mode, OUT may be set manually. The
Manual mode is reflected in the output status. Table E‐30 lists the MAI block parameters, and their units of measure,
description and index numbers.
Modes
The MAI Function Block supports three modes of operation as defined by the MODE_BLK [5] parameter:
D Manual (Man)—The block output (OUT_1 to OUT_8 [8 through 15]) may be set manually.
D Automatic (Auto)—OUT_1 to OUT_8 [8 through 15] reflects the analog input measurement or the simulated value
when the simulation is enabled.
D Out of Service (OOS)—The block is not processed. PV is not updated and the OUT status is set to Bad: Out of Service.
The BLOCK_ERR [6] parameter shows Out of Service. In this mode, you can make changes to all configurable
parameters. The target mode of a block may be restricted to one or more of the supported modes.
Status Handling
In Man mode, the OUT status constant limit is set to indicate that the value is a constant and the OUT status is Good.
OUT_1
OUT_2
OUT_3
OUT_4
OUT_5
OUT_6
OUT_7
OUT_8
DVC6200f Digital Valve Controller
MAI Function Block
February 2017
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