Rockwell Automation 1738-ADNX ArmorPoint I/O DeviceNet Adapters - Manual (Page 19)

Publication 1738-UM001A-EN-P - February 2005
What Is the ArmorPoint DeviceNet Adapter? 2-3
1. Set Subnet/Backplane Baudrate
The adapter and Subnet/Backplane modules must use the same
baudrate to communicate with each other. Use one or both of the
following to set a Subnet/Backplane baudrate.
• Enable or disable the Backplane Autobaud feature for
ArmorPoint I/O modules. ArmorPoint I/O modules have
Autobaud enabled as the default- See page 2-12.
• Set the adapter baudrate for the Subnet. The default for the
1738-ADN12, -ADN18, and -ADN18P is 1Mbaud. The default for
the 1738-ADNX is 125Kbaud - See page 2-9.
You set the backplane baudrate for the 1738-ADN12, -ADN18,
and -ADN18P. You set the Subnet baudrate for the 1738-ADNX.
2. Set Subnet/Backplane I/O Module Addresses
Once the adapter and ArmorPoint I/O modules are communicating at
the same rate on the backplane, you must make sure all modules use
a valid MACID.
Set the Auto Address feature for ArmorPoint I/O modules - See
page 2-13.
For the 1738-ADNX, a DeviceNet configuration tool, such as
RSNetWorx for DeviceNet, may be required to set the node address. (if
node address switches are not present on the Subnet device).
3. Configure the Subnet I/O
In the first two steps, you set a consistent communication rate and
made sure each module uses valid addresses for communication. Next
you must configure the PointBus (e.g., set scan list).
You can configure the PointBus using one of two methods:
• Auto Start Mode (ASM) or
• Manually
For more information on configuring the PointBus, see Chapter 3 for
ASM or see Chapter 4 for manual configuration.