Rockwell Automation 1734-ACNR POINT I/O ControlNet Adapter User Manual - Manual (Page 37)

Publication 1734-UM008B-EN-P - August 2005
Configure the Adapter 4-7
• Name
• Node
• Description (optional)
6. Click the Open Module Properties box to see the Module
Properties dialog when you click OK.
7. Enter the chassis size using the following guidelines.
The chassis size equals 1 for the adapter + the number of POINT
I/O modules installed (physically present on the POINT I/O
backplane)
,
8. Enter Comm Format. Comm Format choices are as follows.
• None - the adapter makes a direct connection to each and every
module - discrete, analog, and specialty.
• Rack Optimization - any of the discrete module’s data is grouped
together to form a rack optimization. This does not include
analog or specialty I/O modules.
• Listen Only - Rack Optimization - read or verify data only, but
does not control the modules (when you have multiple
processors - one processor is used to control and the other
processors are used to monitor).
9. Click OK.
10. Enter the Requested Packet Interval (RPI) to set how quickly
data is exchanged from the adapter.
For information on setting the RPI, refer to the publication for
the individual 1734 I/O module.
IMPORTANT
The chassis size is the total number of modules
installed on the POINTBus backplane. The chassis
size includes the POINT I/O adapter.
For example, for the 1734-ACNR adapter and 3 I/O
modules, enter a chassis size of 4.
IMPORTANT
To avoid overloading the adapter, we recommend
that the RPI be no less than 10 ms for rack
connections and 50 ms for direct connections. If you
have more than 35 digital I/O modules with a rack
connection, use RPI = 20 ms.