Visara SCON-20L Configuration Manual - Manual (Page 29)

707044-006 3-3
Chapter 3. Line Options
Product Series). If you leave the selection to None, the SCON-2XL will treat the
interface as if it does not exist.
Device Low and Device High
The value for the Device Low and Device High parameters identify the low end and
high end for a range of addresses supported by this CU. The value of the Device
Low number is given in hex, and can be anywhere in the range of 00-FF. The Device
High number must be within hex 1F of the value of the Device Low parameter and
must be equal to or larger than the Device Low value. The range defined by the
Device Low and Device High parameters may define up to 32 consecutive addresses,
and must fall in the range of addresses defined by the ‘UNITADD’ parameter in the
‘CNTLUNIT’ macro of the corresponding Host GEN. To support more than 32
addresses, make additional CU definitions.
Caution
Only configure the SCON-2XL for addresses that have been defined by IO Device
Statements in the GEN on the host. Configuring addresses that have not been defined or
that have been defined for use by another controller may result in serious performance
degradation or errors.
LPAR Number
The LPAR Number parameter corresponds to the LPAR number assigned in the
PARTITION parameter of the RESOURCE macro, associated with this connection, in
the host’s IOCDS definition.
Source Link Address
The Source Link Address refers to the ESCON Director port number (2 digit hex) that
is connected back to the mainframe. If an ESCON Director is not used (2XL is directly
connected to a port on the mainframe), leave the default value of FF, or assign the value
as 01.
CU Number
This must correspond to the value of the CUADD parameter of the CNTLUNIT macro
of the host’s IOCDS definition, corresponding to this configuration.
Hot Sessions
Hot Console Sessions give you the ability to create a console session that will appear to
be powered on to the LPAR for as long as the 2XL is online. This may be convenient for
situations where it is desired to have a console session that can be accessed across a
network connection by either one person or by multiple persons. Since the console
device always appears to be powered on, it should not be necessary to vary the console
active when establishing a new connection to the session, as long as the 2XL was active
when the LPAR came up.