Rockwell Automation 1738-ADNX ArmorPoint I/O DeviceNet Adapters - Manual (Page 83)

Publication 1738-UM001A-EN-P - February 2005
Quick Start For the 1738-ADNX B-9
21. Select the Parameters tab and choose Download.
22. Verify that your window looks similar to the following window.
Review of the 1738-ADNX
Rules and the
MACID Parameter
To understand some of the MACID parameters, you should review
some of the rules for using the 1738-ADNX.
• The 1738-ADNX always has address 0 on the Subnet.
• All ArmorPoint I/O backplane module MACIDs must be
numerically less than those of non-backplane Subnet modules.
• Each backplane module’s MACID must be greater than that of its
left neighboring module.
• The 1738-ADNX has a unique attribute: Max(imum) Backplane
MACID. This value represents the highest node address of a
module residing on the backplane. This value must be greater
than or equal to the rightmost backplane ArmorPoint I/O
module, but must be less than that of any non-backplane Subnet
module. You select this value to allow for the future addition of
backplane modules. The attribute’s default value is 31,
representing the middle of the address range.