Rockwell Automation 1771-SDN DeviceNet Scanner Module Installation Instructions - Manual (Page 5)

Publication 1771-IN014B-EN-P - September 2001
DeviceNet Scanner Module Catalog Number 1771-SDN/C 5
Other Features Change of State
Change of state enables the scanner module to perform a scan:
•
whenever a network data change occurs, or
•
at a user-configurable heartbeat rate
Because data is only sent on an as-needed basis, this feature increases
system performance by reducing network traffic.
Cyclic I/O
Cyclic I/O allows you to instruct the scanner module to perform a
scan at a specific send rate.
Because data is only sent at a periodic rate, this feature increases
system performance by reducing network traffic.
Pass-Through
The 1771-SDN “pass-through” feature allows communication with the
DeviceNet network from another network. This feature can be used to
adjust and fine tune the nodes on your network.
For more information on how to use the pass-through feature, refer to
Chapter 5 of the PLC-5 DeviceNet Scanner Module User Manual,
publication 1771-6.5.132.