Rockwell Automation 1746-NI16V SLC 500 Analog Input Modules User Manual - Manual (Page 54)

Publication 1746-UM001A-US-P
5-6 Channel Configuration, Data, and Status
Select Data Format (Bits 8 through 6)
Select a data format for the data word value. Your selection
determines how the analog input value from the A/D converter is
expressed in the data word. Enter your 3-digit binary code in bit fields
8 through 6 of the channel configuration word. The data types are:
•
Engineering Units
•
Scaled-for-PID
•
Proportional Counts
•
1746-NI4 Data Format
•
User-defined Scaling (Class 3 Only)
For all data types, the channel data word is proportional to the analog
input signal.
To have the data in “real” units, the channel data word must be scaled
mathematically. See “Input Image - Channel Data Word” on page 5-8
for the default scaling values and “Scaling the Channel Data Word” on
page 5-10 for data type descriptions and scaling examples.
Select Input Type (Bits 5 and 4)
The input type bit field lets you configure the channel for the type of
input device you have connected to the module. Valid input is an
analog voltage or current that provides a signal within one of the
specified ranges.
Determine the input device type for a channel and enter its respective
2-digit binary code in bit fields 5 and 4 of the channel configuration
word.
Unused Bit (Bit 3)
Bit 3 is not used on the 1746-NI16I or 1746-NI16V modules. Ensure
this bit is always set to zero, or the module returns a configuration
error in the status word for that channel.