Rockwell Automation 20-COMM-P Profibus Adapter - Manual (Page 49)

Configuring the Profibus Scanner 4-19
In the case of invalid GSD module configuration, the peripheral will
send one of the following messages:
GSD Diagnostic Messages
Fault Description
No Ctrl/Stat & Ref/Fdbk The Ctrl/Stat & Ref/Fdbk module must
always be used and placed first in the
configuration.
Module used more than once A GSD module has been used more
than once.
Not supported module An unrecognized module has been
used in the configuration.
20COMM-UM006A-EN-P.book Page 19 Friday, September 28, 2001 10:43 AM