Using Scaled-For-Pid And Proportional Counts - Allen-Bradley SLC 500 User Manual
4-channel thermocouple/mv
input module
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Also See for SLC 500:
- User manual (294 pages) ,
- Installation and operation manual (244 pages) ,
- Installation instructions manual (48 pages)
Table of Contents
5-6
Channel Configuration, Data, and Status
Publication 1746-UM007C-EN-P - July 2004
Using Scaled-for-PID and Proportional Counts
The thermocouple module provides eight options for displaying input
channel data. These are 0.1°F, 0.1°C, 1°F, 1°C, 0.01 mV, 0.1 mV,
Scaled-for-PID, and Proportional Counts. The first six options
represent real Engineering Units provided/displayed by the 1746-NT4,
and do not require explanation. The Scaled-for-PID and Proportional
Counts selections provide the highest NT4 display resolution, but also
require you to manually convert the channel data to real Engineering
Units.
The equations on page 5-7 show how to convert from Scaled-for-PID
to Engineering Units, Engineering Units to Scaled-for-PID,
Proportional Counts to Engineering Units, and Engineering Units to
Proportional Counts. To perform the conversions, you must know the
defined temperature or millivolt range for the channel's input type.
Refer to the Channel Data Word Format table on page 5-9. The lowest
possible value for an input type is S LOW , and the highest possible
value is S HIGH .
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