Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual - Manual (Page 50)

Publication 1746-UM614B-EN-P - September 2007
50 Channel Configuration, Data, and Status
Channel Configuration
Procedure Use this procedure once for each channel to set configuration bits that
determine channel operation. Copy it as needed to write down
configuration selections of all your channels.
Use the table of bit descriptions and the blank configuration
worksheet in Appendix B.
1. Determine the input device type (thermocouple or mV) for a
channel and enter its respective four digit binary code in bit field
0…3.
2. Select the data format for the data word.
Your selection determines how the analog input from the A/D
converter is expressed in the data word.
3. Enter your two digit binary code in bit field 4…5.
4. Determine the desired change to the channel data word when
the module detects an open input circuit.
Enter the two digit binary code in bit field 6…7.
5. If the channel is configured for thermocouple inputs, determine
if you want channel data in degrees Fahrenheit or Celsius, and
set bit 8 accordingly.
6. Enable the channel by setting bit 11.
Default disables the channel.
7. Verify that bits 9, 10, and 12…15 are zero.
8. Repeat steps 1…7 for each channel used.
9. After entering your ladder logic to transfer data to the module,
switch the SLC controller to Run mode to download channel
configurations.
IMPORTANT
If the channel is configured for a mV analog sensor, set bit 8 to
0.