Executing Switches
A switch is an active connection between an input (source) signal and one or
more output (destination) devices. The signals connected in a switch command
are either individual signals or groups of signals coming through the connectors
on the rear of the enclosure. When executing a switch, you must specify a level
that contains all the signals you want to route. Level definitions reside in the
configuration file on each enclosure’s CPU.
An execute switch command string begins with the character “
C
” which initiates
a Change command for routing a switch. The characters and numbers that follow
the “
C
” command tell the system which inputs and outputs to connect on which
level. The last character is the Take “
T
” command which tells the system to
execute the command. For example, the command string
CL0I102O39T
can be
interpreted as follows:
[C]
Change on
[L0]
Level 0,
[I102]
Input 102 to
[O39]
Output 39,
[T]
Take to execute the command. For a complete list of
command characters and their functions, see page 1-5.
Command characters and numbers are echoed back to the terminal screen as the
system accepts them. A command has successfully executed when the entered
“
T
” command appears. If a command or number is not accepted, a different
character appears and all or part of the command is not executed. For
explanations of other possible responses, see page 1-6.
In each Change command, you can enter multiple levels and multiple outputs
(destinations), but only one input (source). To enter multiple levels and outputs,
include a space between each set of numbers. To enter a range of outputs, insert a
colon (
:
) between the lowest and highest numbers of the range.
If the level is not specified in the Change command, the command is executed on
the default level, which is normally Level 0 (e.g.,
CI70O150T
routes Input 70
to Output 150 on Level 0).
BCS Serial Control Protocol
2-1
Executing
S
witches
