Rockwell Automation 1755-OF8 GuardPLC Controller Systems - Manual (Page 250)

250 Publication 1753-UM001C-EN-P - March 2010
Chapter 20 Use the GuardPLC Controller as a Scanner
Connect the Scanner Signals
1. Right-click Scanner and choose Connect Signals from the context
menu to open the Signal Connections dialog box.
2. Assign signals created in the Signal Editor by dragging them to
either the Input or Output tab on the Connect Signals dialog
box.
The Input tab contains all signals to be received from the target.
The Output tab contains all signals to be transmitted to the
target.
3. After the signals are assigned in the desired order, click New
Offsets and RSLogix Guard PLUS! software fills in the offsets
based on the type of signals you created.
You must make sure that the Scanner assembly is big enough to
establish the scanner connections. For example, when you establish a
connection from a GuardPLC controller to the 1794-OB16 FLEX I/O
module, up to 3 words of status may come from the FLEX I/O
module. One word of output data is sent to the digital output module.
This means that the input assembly should be at least 6 bytes in size
and the output assembly should be at least 2 bytes.