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

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Publication 1757-UM007D-EN-P - December 2008

Chapter 8 Supported 1771 Modules

To configure a 1771-NR module, complete the following steps.

1. Set the RTD type for each channel.

2. For any channels that are set to 10-ohms copper, set the offset at

25 C.

3. Set the units of measurement for the temperature, either degrees

Fahrenheit or Celsius. For channels that are configured for ohms,
this will be ignored.

4. If desired, enable digital filtering by setting the digital filter time

constant to a non-zero value, from 0.1 to 10 seconds. To disable
digital filtering, set the time constant to N/A.

5. If desired, enable real-time sampling and set the sampling rate,

from 0.1 to 10.0 seconds. This becomes the effective data update
rate and may override the update rate if the update rate is
smaller.

6. Set the Update Time for the module’s block transfer. The range

is 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.

7. Click OK to accept the module configuration.

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