CHAPTER 7: Operation
55
If a new parameter value is entered which is not compatible with another existing parameter, the
message Incompatible with Parameter (n) is displayed, where (n) is the number of the existing
parameter. You are then prompted again to enter parameter changes.
If your response is invalid or mistyped, an error message is displayed.
7.5.3 O
VERRIDABLE
P
ARAMETERS
Certain parameter values in the asynchronous port and LU menus are followed by a plus (+) or minus
(-) sign. The plus sign allows the parameter to be changed at connect time, while the minus sign does
not allow change. If no sign is present, the parameter is not overridable at connect time. These flags may
be entered independently of the actual parameter value. Thus, the following three examples are all valid
change entries for the Device Type parameter (Asynchronous Port Menu):
1 = ADM3A 1 = - 1 = ADM3A +
At connect time, the value for a non-overridable parameter is the default value specified by the
Configurator. However, for an overridable parameter the Connect processor will display a prompt
followed by the default, to allow entry of a different value if necessary.
For example, if an installation only uses Televideo 925 terminals, all directly coupled to the LinkUp
5294, then the default Device Type (TV925) should be set by the Configurator as non-overridable. An
operator performing a normal connect to the LinkUp 5294 would not then be asked to enter the Device
Type.
Parameters for Printer and Auxiliary Printer LUs cannot be set as overridable. Since these LUs are
controlled by the host, their parameters cannot be changed at connect time.
If a port and its associated default LU are configured with no overridable parameters, a connecting
terminal will immediately enter Emulation Mode with no prompts being displayed. If configuration is
necessary, execute the INITIALIZE TERMINAL sequence (usually [ESC <]) to exit Emulation Mode and
enter Connect Mode. Configurator Mode may then be accessed from System Management Mode.
7.5.4 C
ONFIGURATOR
M
ODE
C
OMMANDS
Configuration commands are entered from the terminal keyboard. The LinkUp 5294 always provides a
prompt whenever a response is required. The general format of a configuration menu is:
[n] [Parameter Name] [current setting]
[overridable]
[n][Parameter Name] [current setting]
Enter Change(s):
The response format is: [n] = [New Value]
where: [n] is the number shown on the menu, and [New Value] is a valid setting
