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••
Server Configuration In Depth
Installation & Reference Guide — Doc. 5798
The
Configuration Options window
,
Signal Blocks
tab, showing all the signal blocks defined in the demo
configuration. As shown, all seven signal blocks are active (checked); and the e-mailer signal block for
demo3 is selected.
Signal Blocks, once defined, can be active or inactive. A check in the box next to the
signal block name indicates that the signal block is activated. If a signal block
definition is not checked, it is ignored when the server protocol is started, neither
accepting nor responding to incoming signals in its range. Inactive signal blocks are
not considered for signal space conflicts with other signal blocks when the server
protocol is started.
N
OTE
:
Signal Blocks may be defined before or after the COM Settings to which they need to refer
are defined. If the signal block is defined first, you will not be able to specify the COM Settings yet.
This is permitted. However, such signal blocks cannot be activated until they reference defined
COM Settings.
The server can have any number of signal blocks defined and active simultaneously.
Selecting a signal block from the list in the
Signal Blocks
tab and clicking the
Modify…
button — or defining a new signal block with the
Add…
button — opens a
signal block definition window.
Such a window shows a particular signal block definition. The definition includes:
•
Interface definition. The options across the top of the
Signal Block Definition
window are common to all types of signal blocks and include the signal block’s
name, system connection, and signal offset. (The term
interface
refers to the
server-signal block interface;
i.e.,
information that all signal blocks must have to
be handled by the server as signal blocks.)
•
Optional signal definitions. Words shown in the
Signal Block Definition
window
in
bold
case are names of optional signals implemented by the signal block.
These are included in the signal block definition (they are "defined") either by
checking the adjacent checkbox, or (in the case of a set of enumerated signals)
by supplying a non-zero number in the adjacent text field. Undefined signals do
not appear in the signal list and must not appear in the matching
Intersystem
Communications
symbol on the control system side. Be aware that there may
also be a number of non-optional signals which are not shown in the window.