Bradley Smoker PLC-5 Contains this Information, Being polled, etc, New remote station is polled

Communicating with Devices on a Serial Link 10-17

To create station lists, place each station address in an individual word in a poll file (normal and/or priority) starting at word 2. The poll file layout is as follows:

This Word in a Poll File	Contains this Information
Word 0	total number of stations in the list
Word 1	address location (poll offset) of the station currently
	being polled
	For example: a value of 1 means the station address stored in
	word 2 is being polled, 2 means the address stored in word 3 is
	being polled, etc.
	This word is automatically updated by the master station as a
	new remote station is polled.
Word 2 through word xx	remote station address in the order that the station should be
	polled

To place a station address in a poll file, do the following:

1.Access the data monitor in your programming software.

2.Specify the address of the integer file that is either the normal poll file or priority poll file (e.g., if the normal poll file is N11, then you specify N11:0).

3.Enter the station addresses of the remote stations you want in the poll list starting at word 2. Put them in the order you want them polled.

IMPORTANT

Station addresses are octal addresses. The poll files are integer files. The default radix is decimal. To properly enter station addresses in a poll file, you must either:

•change the radix of the file to octal

•convert the octal station addresses to decimal before entering the addresses

Below is an example of a station list containing three stations: octal addresses 10, 11, and 12 have been entered. Station 12 (10 decimal) is being polled.

Poll File	Word 0	Word 1	Word 2	Word 3	Word 4
N:11	3	3	08	09	10
N:xx	total number	pointer showing the	address of first station	address of second	address of third
	of stations	station address being	in list	station in list	station in list
		polled
		(Station 12 in word 4
		is being polled.)

Publication 1785-UM012D-EN-P - July 2005