Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual - Manual (Page 95)

4–3 Configure the Adapter for Master/Slave Communication
Publication 1794ĆUM057B-EN-P - November 2001
If the send parameter data is received with no user parameter data,
the flags byte is set to zero which selects:
•
auto configure
•
reset outputs to zero on fault
•
reset inputs to zero on fault
The reserved bits must be set to zero to prevent undesired firmware
update behavior. This is the default behavior of the module as
defined in the GSD file.
The descriptions in this chapter use the following example FLEX I/O
configuration to explain the information required for each of these
functions:
1794ĆAPB Adapter Slave
Flex I/O System
1794ĆIB16 1794ĆOB16 1794ĆIE8 1794ĆOE4
Module ID#: 0281h ID#: 0191h ID# 1920h ID# 1121h
Auto Configure Format
The Auto Configure format allows you to change modules without
affecting the User Parameter or Check Configuration data. This
format provides no keying from the master on the I/O modules
installed in the FLEX I/O system. The installed module at power-up
is taken as the key.
If you change a module while it is being controlled by a master, a
minor recoverable fault will occur. To recover from this fault, you
must replace the module with an identical module type.
User Parameter Example
User Parameter Message, Auto Configure Format (Length 1 byte)
Name
Value Description
Octet 8: 00h Auto Configure Format, Reset to Zero on Fault