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Parallel Channel Configuration Information
Table 17 lists all configuration items, the purpose of each item, and the allowable
value options for each item. The factory-set default values are underlined.
Table 17. Parallel Channel Attachment Items
Configuration Item Description Value Options
Parallel Link A
Installed
Specifies if Parallel Channel Link A is installed. Yes or No
Parallel Link B
Installed
Specifies if Parallel Channel Link B is installed. Yes or No
Device Address Specifies the 2-digit hexadecimal channel address which
includes the device address.
Notes:
1. In simplex mode, only one device address is required.
In dual simplex mode, each printer requires a unique
device address. Printer 1 requires an even number
(for example, X'30'); Printer 2 requires the next
consecutive number (for example, X'31').
2. The duplex system does not require a unique number.
It can use either of the addresses used for dual
simplex Printer 1 or dual simplex Printer 2. However,
it is often easier from an operational viewpoint to
assign duplex a separate address (so the duplex and
simplex printers look like unique devices to the
operating system). The general convention in this case
is to assign the duplex system the next consecutive
address (even) after the address for simplex Printer 2.
For example, if you define Printer 1 in dual simplex
as X'30', you should then define Printer 2 in dual
simplex as X'31', and, optionally, define the complete
system in duplex as X'32'.
3. The device addresses specified above must match the
device addresses defined to the host PSF software,
and in the case of S/390 hosts, the I/O device
definitions.
00 to FF (Hexadecimal notation).
Default is X'00'
Second Channel Specifies the switching mode of the Two-Channel Switch:
Static or Dynamic Mode. When a second Parallel Channel
is installed, a Two-Channel Switch facility is provided.
v Static: You can enable only one channel at a time. You
can connect two interfaces to two channels on the same
processing unit, on tightly coupled processing units
(units controlled by the same operating system), or on
independent (uncoupled) processing units.
v Dynamic: You can enable both channels at the same
time with the two-Channel Switch used as a dynamic
interface switch. Connect the two interfaces to two
channels either on the same processing unit or on
tightly-coupled processing units (units controlled by
the same operating system).
You cannot select this item unless two channels are
installed.
Static or Dynamic
232 InfoPrint 3000 Operator’s Guide