Rockwell Automation 1755-OF8 GuardPLC Controller Systems - Manual (Page 213)

Publication 1753-UM001C-EN-P - March 2010 213
Introduction to EtherNet/IP Communication Chapter 18
N121:0 corresponds to the first INT tag in the GuardPLC assembly 121.
N121:1 corresponds to the second INT tag in the GuardPLC assembly
121.
Writing BOOLs to the GuardPLC Controller from the PanelView
Plus Terminal
This example uses output assembly 123. Two BOOLs are written by
the PanelView Plus terminal to the controller. Four BOOL tags,
toGuard_BOOL1 and toGuard_BOOL2 and two dummy tags, were
used in the controller as shown on the following page.
TIP
The dummy tags are required because BOOL extensions cannot
be used on the write tags within the PanelView Plus terminal.
INT tags must be used on the terminal side. Because an integer
is 2 bytes, a dummy is needed to fill this space in the
controller’s buffer. A BOOL tag takes up a complete byte in the
GuardPLC controller’s buffer.