Visara CNA-8000 Installation - Manual (Page 62)

Chapter 4. ESCON/FICON XCA Configuration
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UNITADD Address Format
The UNITADD parameter is specified by the format of UNITADD=(xx,yy) where xx is
the lowest address of a range, and yy indicates how many consecutive addresses are
defined beginning with the lowest address of the range. Subchannel addresses are defined
as a hexadecimal number, but the value of yy specifies the total number in decimal. For
example, the parameter UNITADD=(A0,32) is interpreted as a range of addresses
beginning with the subchannel address ‘A0’ and ending with the subchannel address
‘BF’.
Configuring Subchannels
Once a CU has been defined, you may configure the individual subchannel addresses
called out by the Lowest IODEVICE Address and the Highest IODEVICE Address, by
pressing the [Subchannels] button. First select which CU you wish to configure sessions
for, and select the [Subchannels] button. Each subchannel corresponds to an XCA
definition on the host CPU.
The Update Subchannels panel is displayed below.
Field Definitions
Update Subchannels for CU: This dropdown allows you to select the CU that you wish
to configure the subchannels for. Note that you need to press the [Update] button to save
changes made to the currently displayed CU subchannels before displaying another CU,
or the changes will be lost.
Subchannel: This is an information only field and specifies which Subchannel is being
displayed.