Rockwell Automation 1757-ABRIO Process Remote I/O (RIO) Communication Interface Module - Manual (Page 101)

Publication 1757-UM007D-EN-P - December 2008 99
Supported 1771 Modules Chapter 8
To configure the 1771-IL module, complete the following steps.
1. For each channel, select the range for each channel and enter
the scaling values.
The low scaling value corresponds to the minimum input
voltage or current; the high scaling value corresponds to the
maximum voltage or current.
For example, if the scaling values are 10.0 and 22.5 and the
range is configured for 0 to 5V dc, an input of 0V dc produces a
scaled input value of 10.0 and an input of 5V dc produces a
scaled input of 22.5. The range of scaling values is -3.4e38 to
3.4e38.
2. If desired, enable digital filtering and set the digital filtering time
constant.
If digital filtering is enabled, it applies to all channels. The digital
filtering time constant can range from 0.1 to .99 seconds.
3. If desired, enable real-time sampling and set the sampling rate,
from 0.1 to 3.1 seconds.
This becomes the effective data update rate and may override
the update rate if the update rate is smaller.
4. Set the Update Time for the module’s data. The range is from
1 to 16382 milliseconds.
This sets the requested update rate; the actual rate depends on
the baud rate, the number of racks on the RIO network and
whether block transfers are running to other modules in the
same rack.
5. Click OK to accept the module configuration.
I/O Data
The 1771-IL module returns 8 words of scaled floating point values.
1771-IL Module I/O Data
Data Word Description
0 Channel 1 data
1 Channel 2 data
2 Channel 3 data
3 Channel 4 data