GFK-0825F Chapter 5 Station Configuration 5-7
5
Change the Serial Bus Address of the Bus Interface Unit
For a new BIU, the Serial Bus Address is assigned on the Program Block ID screen, as described
previously. If you want to change the Serial Bus Address of a previously-configured BIU, use the
Device SBA screen shown below, instead.
When you press F1 (Genius Configuration) from the Configuration menu, the following screen
appears:

Device SBA

14

Prv > entr

Serial Bus
Address
Press F1 if you want to
return to the previous
menu.
On this screen, you can change a previously-configured Serial Bus Address (block number). There
are 32 available addresses (from 0 to 31) on a bus. One is needed for the Hand-held Monitor;
typically this is Device Number 0. Another is needed for the Bus Controller. Typically, this is 31
(30 or 31 for redundancy systems). A Bus Interface Unit is usually assigned a Serial Bus Address
from 1 to 29 or 30. Duplicate SBAs disrupt communications and are not permitted.
Note
If a Bus Inter f a ce Unit has a Ser i al Bus Address conflict on an op erating bus, i t
will not scan the modules in the station until the fault is cleared.
1. Enter a Serial Bus Address using the HHM keypad.
2. Pr ess the F4 (entr) key. An error message appears if the number has been used for another
device on th e bu s.
If you want to go to the next screen without changing the Serial Bus Address, press F2 ( > ).