Rockwell Automation 1757-ABRIO Process Remote I/O (RIO) Communication Interface Module - Manual (Page 104)

102 Publication 1757-UM007D-EN-P - December 2008
Chapter 8 Supported 1771 Modules
To configure the 1771-NOC module, complete the following steps.
1. For each channel, enter the scaling values.
The low scaling value corresponds to the minimum output
current; the high scaling value corresponds to the maximum
output current.
For example, if the scaling values are 10.0 and 22.5, a value of
10.0 produces an output of 0 mA and a value of 22.5 produces
an output of 25 mA. The range of scaling values is -3.4e38 to
3.4e38.
2. For each channel, set the Reset State.
This can be either Minimum, Maximum, Last State, or User
Value. This is the value the channel output will be if the
1771-NOC module loses communication with the 1757-ABRIO
module or the host controller stops updating the tag to which
the 1771-NOC module’s data is mapped. If the Reset State is set
to User Value, you must also enter a reset value.
3. 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.
4. 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.
5. Click OK to accept the module configuration.
I/O Data
The host application writes 8 words of floating point data to the
1771-NOC module.
1771-NOC Module I/O Data
Word Description
0 Channel 1 data
1 Channel 2 data
2 Channel 3 data