Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 137)

Publication 1785-UM012D-EN-P - July 2005
Communicating with Devices on a DH+ Link 9-5
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
Global status flag file The file where you want to store token
pass data Cursor to the field, type an integer file number (10-999), and press
[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.
This Field Specifies Configure by Doing the Following