Rockwell Automation 1746-NR4 SLC RTD/Resistance Input Module User Manual - Manual (Page 107)

107 Publication 1746-UM008B-EN-P - December 2006
Chapter
8
Application Examples
This chapter provides two application examples to help you use the
RTD input module. They are defined as a:
• basic example.
• supplementary example.
The basic example builds on the configuration word programming
provided in chapter 6 to set up one channel for operation.
This setup is then used in a typical application to display temperature.
The supplementary example demonstrates how to perform a dynamic
configuration of all four channels. The example sets up an application
that allows you to manually select whether the displayed RTD input
data for any channel is expressed in °C or °F.
Use the Channel Configuration Worksheet (With Settings Established
for Channel 0).
Basic Example The Device Configuration diagram indicates the temperature of a bath
on an LED display. The display requires binary coded decimal (BCD)
data, so the program must convert the temperature reading from the
RTD module to BCD before sending it to the display. This application
displays the temperature in °F.
Device Configuration
Bath
200 Ω Platinum RTD Unit 1746-NR4
1746-OB16
SLC 5/04 Controller
LED Display
(DC Sinking Inputs, BCD Format)