Rockwell Automation 1755-OF8 GuardPLC Controller Systems - Manual (Page 224)

224 Publication 1753-UM001C-EN-P - March 2010
Chapter 19 Use GuardPLC Controller as an Adapter
To establish a listen only connection, follow these steps.
1. Choose Input Data — SINT in the Comm Format field.
2. Type the input assembly instance number in the Input Assembly
Instance field.
3. Type the size of the input assembly in bytes in the Input Size
field.
4. Type 199 for the first Output Assembly Instance number and 198
for all subsequent listen only connections.
Number 198 is the Listen Only instance number, a virtual
number that is not associate with any real assembly.
5. Click Next and type the desired packet rate for this connection
in milliseconds.
6. Click OK.
IMPORTANT
This entry must exactly match the size of the input
assembly, or the GuardPLC adapter controller will return
an error.
The size of the input assembly is determined during the
signal connection process.