HP 28642A manual Set the Scsi Bus Address, Defauh, = closed = open Installing the Adapter l-9

Set the SCSI Bus Address

There maybe up to eight devices(which includes the SCSIadapter) connectedto a SCSI bus. Each devicemust havea unique address,from 0 to 7. The bus addressdetermines the device’spriority on the bus.Sevenis the highest priority and zero is the lowest priority.

Switches3,2, and 1 are usedto set the adapter’saddresson the SCSIbus. In binary, switch 3 representsthe most significant digit. When shipped from the factory, the addressis set to 7 (switches3,2, and 1 are eachset to “l”, that is, in the “open”position) asshownin figure l-4.

For most applications, “7”is the best choice for the adapter’s SCSI busaddress. Table l-2 showsswitch positions for other possibleaddresses.Be sure all deviceson the bushave a different address.

Table 1-2. SCSI Address Switch PositIons

	Switch		SCSI Bus 1
3	2	1	Address
0	0	0	0
0	0	1	1
0	1	0	2
0	1	1	3
1	0	0	4
1	0	1	5
1	1	0	6
1	1	1	7 (Defauh)

0 = “closed”

1 = “open”

Installing the Adapter l-9