CHAPTER 7: Operation
71
If, during a two synchronous port operation, the host sends a request to Port 1 for an
LU associated with Port 0, the LinkUp 5294 responds with an unavailable LU error
message.
2. Associated SDLC Link Number
Valid value for standard LinkUp 5294 units: 0 (for Link 0 Station Address).
Valid values for deluxe units: 0 (for Link 0 Station Address), 1 (for Link 1 Station Address), 2 (for Link 2
Station Address), and 3 (for Link 3 Station Address).
As previously mentioned, deluxe LinkUp 5294 can logically emulate as many as four remote controllers
per synchronous port. Therefore, not only must you define the LU under configuration to a specific
synchronous port, but you must also define it to a specific Link Station Address.
3. Local Station Address
Valid values are: Any hexadecimal value from 0 to 0F.
Local Station Address refers to the workstation identification number assigned to one of the devices (a
display or printer) communicating with your System/3X host. It is also called a Local Session ID or
LSID. The correct value for this parameter depends on what the designated LSID is on your System/3X
host. Once this value is set, the LinkUp 5294 is able to establish a communication link between your 3X
host and one or more of its LUs.
NOTE
Any LinkUp 5294 LU may be linked to any System/3X LSID viable to any Controller
Address defined to one of the LinkUp 5294 Link Station Addresses; however, a one-to-
one correspondence (one LSID to one LU) must be maintained.
An IBM 5251 Model 12 controller uses LSIDs numbered 0 and 2 through 9.
An IBM 5294 controller uses LSIDs numbered 0 through 9.
An IBM 5394 controller uses LSIDs numbered 0 through 0F.
Operational Mode
Valid values are: LOC (for Local Copy printer) or SYS (for System printer).
If you require the ability to print the contents of their terminal screens to a designated printer, you must
select and define a printer LU for a local copy operational mode, or LOC. If your application
necessitates being able to perform print jobs from your host, you must select and define a printer LU for
a system operational mode, or SYS.
CAUTION
These two values are mutually exclusive. If one is defined to an LU, the other cannot be
supported by the same LU.
Line Length (Columns)