Rockwell Automation 1757-ABRIO Process Remote I/O (RIO) Communication Interface Module - Manual (Page 88)

86 Publication 1757-UM007D-EN-P - December 2008
Chapter 8 Supported 1771 Modules
To configure the 1771-IFE module, complete the following steps.
1. Set the Input Type to single-ended or differential operation.
2. For each channel select the voltage or current range 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.
3. 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 0.01 to .99 seconds.
4. If desired, enable real-time sampling.
If real-time sampling is enabled, the sampling rate is set for the
data and overrides the Update Time. The real-time sampling
period can range from 0.1 to 3.1 seconds.
5. Type the Update Time.
The Update Time is the rate at which the block transfer read,
which reads the data from the 1771-IFE module, executes. The
range of values is 1 to 16382 ms. 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.
6. Click OK to accept the configuration.
If you edit an existing 1771-IFE module and change the module
between single-ended and differential, any existing mappings for the
module will be deleted.