Rockwell Automation 1746-NT4 Series B,D17466.6.1 SLC 500 4-Channel Thermocouple/mV Input Module User Manual - Manual (Page 57)

Publication 1746-UM007C-EN-P - July 2004
Channel Configuration, Data, and Status 5-5
Select Input Type (Bits 0-3)
The input type bit field lets you configure the channel for the type of
input device you have connected to the module. Valid input devices
are types J, K, T, E, R, S, B, and N thermocouple sensors and ±50 mV
and ±100 mV analog input signals. The channel can also be
configured to read the cold-junction temperature calculated for that
specific channel. When the cold-junction compensation (CJC)
temperature is selected, the channel ignores the physical input signal.
Select Data Format (Bits 4 and 5)
The data format bit field lets you define the expressed format for the
channel data word contained in the module input image. The data
types are engineering units, scaled-for-PID, and proportional counts.
The engineering units allow you to select from two resolutions, 1 or
10. For engineering units 1, values are expressed in 0.1 degrees or
0.01 mV. For engineering units 10, values are expressed in 1.0 degrees
or 0.1 mV. (Use the 10 setting to produce temperature readings in
whole degrees Celsius or Fahrenheit.)
The scaled-for-PID value is the same for millivolt, thermocouple, and
CJC input types. The input signal range is proportional to your
selected input type and scaled into a 0-16,383 range, which is standard
to the SLC PID algorithm.
The proportional counts are scaled to fit the defined temperature or
voltage range. The input signal range is proportional to your selected
input and scaled into a (-32,768 to 32,767) range.