Configure Your Thermocouple Input Module; Basic Set-Up Parameters - Rockwell Automation Allen-Bradley 1734-IR2 User Manual

24 Configure Your Module
Configure Your
Thermocouple Input
Module
Publication 1734-UM004F-EN-E - December 2012
Configuration can be divided into two categories: Basic Set-up Parameters and
Advanced Setup Parameters.

Basic Set-up Parameters

The basic parameters you need to set for the thermocouple module consist of:
• Temperature units - Select how the input is linearized:
– mV/Custom Scale (default)
– Celsius
– Fahrenheit
– Kelvin
– Rankine
• Thermocouple type - Choose the type of sensor for this input. The
module performs the linearization of the selected type.
– mV (No Linearization)
– Type B
– Type C
– Type E
– Type J
– Type K
– Type N
– Type R
– Type S
– Type T
• Cold Junction Enable - This bit enables or disables the cold junction
linearization. If enabled, the proper cold junction compensation value is
applied to the selected thermocouple. If disabled, the data (CJ
Temperature) is still available but not applied to the input. If the Cold
Junction Compensation Removable Terminal Block is not available, this
parameter should be set to disabled. A cold junction value can be added
using the Cold Junction Offset parameter.
• Cold Junction Produced Data - Selects how the Cold Junction Data is
returned in the Produced IO message. The last two bytes of the
produced message contain one of the following.
– None (zeros)
– Channel 0 (default)
– Channel 1 - Average of both channels
The Over/Under Range status is also included in the last two
IMPORTANT
bytes, along with the cold junction value.