705-5100-121 Datasheet, PDF(30/56 Page) Magnetrol International, Inc.

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705-5100-121 Datasheet, PDF (30/56 Pages) Magnetrol International, Inc. – GuidedWave Radar Level Transmitter

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HI_ALM: Status for high alarm and associated time stamp.

LO_ALM: Status for low alarm and associated time stamp.

LO_LO_ALM: The status for low low alarm and its

associated time stamp.

The TRANSDUCER and AI blockâs MODE_BLK parame-

ter must be set to AUTO to pass the PV Value through the

AI to the network.

Transducer scaling, called XD_SCALE, is applied to the

PV from the CHANNEL to produce the FIELD_VAL in

percent. Valid XD_SCALE engineering units is limited

to the five allowable codes of meters (m), centimeters (cm),

feet (ft), inches (in), and percent (%) for the Level channels,

or gallons, liters, % for the volume channels.

The AI blocks can have a BLOCK_ERR when:

1. Channel is not set correctly.

2. XD_SCALE does not have suitable engineering units or has

range incompatibility.

3. SIMULATE parameter is active

4. AI block MODE is O/S (out of service).

NOTE: This can be caused by the Resource Block being OOS or the AI

Block not scheduled for execution.

5. L-TYPE not set or set to Direct with improper

OUT_SCALE.

The AI block uses the STATUS_OPTS setting and the

TRANSDUCER PV LIMIT value to modify the AI PV

and OUT QUALITY.

Damping Filter is a feature of the AI block. The PV_FTIME

parameter is a time constant of a single exponential filter for

the PV, in seconds. This parameter can be used to dampen

out fluctuation in level due to excessive turbulence.

The AI block has multiple ALARM functions that monitor

the OUT parameter for out of bound conditions.

4.5.2 Local Display of Analog Input Transducer Block Output

The Model 705 3x FOUNDATION fieldbusâ¢ Device Revision

2 transmitter incorporates a feature that allows the deviceâs

Analog Input [AI] block Out values to be displayed on the

local LCD.

NOTE: There are many reasons that AI block Out values can deviate

from the measurement value originating in the Transducer

block, and because the keypad and local display will only pro-

vide access to Transducer block parameters, there is no way to

explore or change the other fieldbus configuration items affect-

ing the AI block output using the keypad and LCD.

57-640 Eclipse Guided Wave Radar Transmitter - FOUNDATION fieldbusâ¢

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