Rockwell Automation 1746-NT8 SLC 500 Thermocouple/mV Analog Input Module User Manual - Manual (Page 43)

Publication 1746-UM022B-EN-P - January 2005
Channel Configuration, Data, and Status 4-3
5. If the channel is configured for thermocouple inputs, determine
if the channel data word should read in degrees Fahrenheit or
degrees Celsius and enter a one or a zero in bit 9 of the
configuration word. If the channel is configured for a mV analog
sensor, enter a zero in bit 9.
6. Determine the desired input filter frequency for the channel and
enter the two-digit binary code in bits 10 and 11 of the channel
configuration word. A lower filter frequency increases the
channel update time, but also increases the noise rejection and
channel resolution. A higher filter frequency decreases the
channel update time, but also decreases the noise rejection and
effective resolution.
7. Ensure that bits 12 through 14 contain zeros.
8. Determine whether the channel input image word should
contain data or status. Place a one in bit 15 if channel data is
desired. Place a zero in bit 15 if status is desired.
9. Build the channel configuration word for every channel on each
thermocouple/mV module repeating the procedures given in
steps 1 through 8.
10. Enter this configuration into your ladder program and download
it to the thermocouple module.