Rockwell Automation 1755-OF8 GuardPLC Controller Systems - Manual (Page 272)

272 Publication 1753-UM001C-EN-P - March 2010
Chapter 21 Communicate with ASCII Devices
For example, this string replies to the master request for the first two
variables from the slave.
Every data field in the message is separated with a slash ( / ). The
slash also counts as a character when counting the total number of
characters in the data string.
If the master request was not received properly at the GuardPLC
controller, the slave response is the following.
This error response is typically sent when more signals are requested
than exist in the ASCII protocol output tab. For example, 10 signals
were dragged to the ASCII output section, but 20 signals were
requested in the command string.
Start Sign Destination Source Function
Code Start
Address Number of
Variables Number of
Characters Data End Sign
^ 01 15 r 00000 002 0005 4/123 &
TIP
The reply string will have a variable number of characters if
non-BOOL are used. For example, 99 is 2 characters, 100 is 3
characters. There is no leading zero.
Start Sign Destination Source Function
Code Start
Address Number of
Variables Number of
Characters End Sign
^ 01 15 E 00000 000 0000 &