Bradley Smoker PLC-5 Using the Global Status Flag File, Pass data, Global status flag file

Communicating with Devices on a DH+ Link 9-5

This Field	Specifies	Configure by Doing the Following
Global status flag file	The file where you want to store token	Cursor to the field, type an integer file number (10-999), and press
	pass data	[Enter].
		The system creates an integer file 64 words long.
		ATTENTION: When you change the controller from run or test to program
		mode, the controller writes zeroes in the global status flags file. Any
		information previously in this file is lost.
		For more information on the global status flags file, see below.

Using the Global Status Flag File

Use the global status flag file to store token pass data. This file stores a 16-bit word of data for each station on the DH+ network. The stations use this file to automatically share data with other stations without requiring user programming.

When a station sends the token to the next station, it, in effect, sends a broadcast message that contains 1 word of information from its own address area in its global status flag file. The data sent out is taken from the word in the global status file that is equal to its own station address. The token is seen by all stations. Each station on the network examines the token and places the word of global status data from the sending station into the word that corresponds to the sending station’s address

Publication 1785-UM012D-EN-P - July 2005