Rockwell Automation 5720 DriveLogix System - Manual (Page 206)

Publication 20D-UM002C-EN-P - November 2003
9-12 Communicating with Devices on a Serial Link
Polling mode Select one of these:
• Message Based (slave cannot initiate messages)
• Message Based (slave can initiate messages) - default
• Standard (multiple message transfer per node scan)
• Standard (single message transfer per node scan)
Master transmit Standard polling modes only
Select when the master station sends messages:
• between station polls (default)
• in polling sequence
Normal poll node tag Standard polling modes only
An integer tag array that contains the station addresses of the slave stations.
Create a single-dimension array of data type INT that is large enough to hold all the normal station
addresses. The minimum size is three elements.
This tag must be controller-scoped. The format is:
list[0] contains total number of stations to poll
list[1] contains address of station currently being polled
list[2] contains address of first slave station to poll
list[3] contains address of second slave station to poll
list[n] contains address of last slave station to poll
Normal poll group size Standard polling modes only
The number of stations the master station polls after polling all the stations in the priority poll array. Enter 0
(default) to poll the entire array.
Priority poll node tag Standard polling modes only
An integer tag array that contains the station addresses of the slave stations you need to poll more
frequently.
Create a single-dimension array of data type INT that is large enough to hold all the priority station
addresses. The minimum size is three elements.
This tag must be controller-scoped. The format is:
list[0] contains total number of stations to be polled
list[1] contains address of station currently being polled
list[2] contains address of first slave station to poll
list[3] contains address of second slave station to poll
list[n] contains address of last slave station to poll
This field: Description: