Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 241)

Publication AG-UM008C-EN-P - February 2005
Configuring Logix Controllers 7-15
Create Polling List(s)
After defining your polling tag(s) and group size, create polling lists
by entering the station address of each slave station into either the
normal poll node tag or priority poll node tag. Place each station
address in an individual word in a poll tag (normal or priority) starting
at word 2.
The normal and priority poll file layout is as follows:
To place a station address in a poll file:
1. Access the Controller Tags.
2. Expand the normal or priority poll node tag.
3. Enter the station addresses of the slave stations you want in the
poll list starting at word 2. Put them in the order you want them
polled. Enter the total number of slave station addresses in this
list into word 0.
Figure 7.3 is an example of a polling list containing three stations:
addresses 8, 9, and 10. Station 10 is being polled.
Figure 7.3 Example Station List
This word in a poll tag Contains this information
word 0 total number of stations to be polled (for a list)
word 1 the address of the station currently being polled
This word is automatically updated by the master
station as a new slave station is polled.
word 2 through word xx the slave station address in the order that the stations
should be polled
Store one station address in each word.
total number
of stations in
poll list
pointer showing the station
address being polled address of first
station in list address of second
station in list address of third
station in list