Rockwell Automation 1734-ADNX POINT I/O DeviceNet Adpater User Manual - Manual (Page 31)

Publication 1734-UM002C-EN-P - July 2003
What is the 1734-ADN(X) Adapter? 2-11
Set this parameter in RSNetWorx for DeviceNet to one of the
following baudrates:
• 125 Kbaud
• 250 Kbaud
• 500 Kbaud
• 1 Mbaud (available with the 1734-ADN only)
When you download this parameter, the adapter sends a command to
reset all present I/O modules on the backplane to the new baudrate.
If additional modules are connected to the adapter, you must
download the Backplane/Subnet Baudrate to make sure the new
modules use the same rate as the others.
The baudrate may not take effect until power is recycled or the I/O
modules are reset.
Backplane/Subnet Baudrate performs the following functions:
• Sets the adapter’s Subnet baudrate
• Sends a message to all connected backplane I/O modules. If an
I/O module is set to autobaud, it receives the message but
ignores the new baudrate.
IMPORTANT
Changes to the Backplane/Subnet Baudrate
parameter only take effect if they are downloaded on
an individual basis (e.g., If you change the
Backplane/Subnet Baudrate and download the
changes with additional changes to other features,
the Backplane/Subnet Baudrate remains at the
previous setting).
Also, this parameter should be set to “Do Nothing”
when you download all parameters or when
Automatic Device Replacement is enabled for
the adapter.
If you want to set an I/O module to use a specific
baudrate (i.e., 125, 250, 500), you must first disable
Backplane Autobaud for that module.