Technical data

driver utility to supply values to the UNITNUM parameter and to set a value
of zero to device parameter FORCEUNI.
The FORCEUNI parameter controls the use of UNITNUM to override the
default device unit number supplied by the jumpers. When FORCEUNI is
set to a value of zero, the operating system uses the value assigned to the
UNITNUM parameter; when FORCEUNI is set to a value of one, the operating
system uses the value supplied by the jumpers.
The NODENAME parameter allows each device to have an alphanumeric node
name of up to eight characters. DSSI devices are shipped from the factory with
a unique identifier, such as R7CZZC, R7ALUC, and so on. You can provide
your own node name.
The SYSTEMID parameter provides a number that uniquely identifies the
device to the operating system. That parameter may need to be modified only
when replacing a device. Only Digital service representatives and licensed
self-maintenance customers should remove devices.
DSSI NODE ID is the unique number held by one DSSI node within one DSSI
bus. See Figure C–1 and Table C–1 for instructions for setting the DSSI Node
ID.
Figure C–1 Setting the DSSI Node ID
Pin
1
3
5
2
19
20
MLO-009353
Programming Parameters for DSSI Devices C–3