WattMaster WCC II - Manual (Page 115)

Section 3: Screen Descriptions
WCC II Operator’s Guide
Operator Interfaces 3-83
Make your selection by pressing the once for each
choice until the desired value and condition have been selected,
and then press
.
To understand how the combinatorial binary global works, a short
description of logic is needed. The combinatorial global is read
as “Value is (ON or OFF) when (ANY or ALL) of the following
conditions are met.”
The phrase “Value is (ON or OFF)...” simply states what value the
binary global will have if and only if the rest of the phrase is a true
statement.
This second part of the sentence reads as “...when (ANY or ALL) of
the following conditions are met.” If the word “ANY” is selected,
the binary global will take on the specifi c value if at least one of
the statements following the sentence is true. If the word “ALL”
is selected, then the binary global will take on the specifi ed value
if and only if all of the statements following the sentences are true.
The logical equivalent for “ANY” is the boolean function “OR,”
and the logical equivalent for “ALL” is the boolean function
“AND.”
_____ is ON default true
_____ is OFF default false
Next on the Binary Global Screen is a list of “statements” which
are used to determine the “trueness” or falseness” of the binary
global. These statements are constructed by entering the logical
address of a particular point. This is best shown by the following
examples:
Value is ON when ANY of the following conditions are met:
W2 is ON default FALSE
GB5 is OFF default TRUE
The segment of the screen shown above would read, “Value is ON
when either week schedule #2 is ON or binary global #5 is OFF.”
Note that the word “or” was used to describe the global.
Value is ON when ALL of the following conditions are met:
1K1H is ON default TRUE
W6 is OFF default FALSE
This screen would read, “Value is ON when the 1H contact of
satellite #1 is ON and week schedule 6 is OFF.” Again, note that
the word “and” was used to describe the global.
If a value or any of the point addresses specifi ed by the user cannot
be found, then the system will look at the command given in the
“default” column. In other words, in the example given, if week
schedule #6 (W6) cannot be found (i.e., it has not been set up), then
the system will consider the statement “W6 is OFF” to be a false
statement, and therefore it will assume W6 is ON.
In Local Set this global defaults to _____.
Specifi es the state (or value) of the binary global when the satellite
is in the Local Set mode. The satellite is in local set when it has lost
communications with the front end computer.
------------ALARM-------------
Set Condition: None
Type: 0 Message 0
The system has the capability of generating an alarm if the
value of this binary global is either ON or OFF. The type is 1-8,
1 being the highest priority and 8 being the lowest. The system
will automatically print out the alarm message associated with
the message number above. The ECC/WCC II system can report
alarm types 1-5 to a remote printer.
Notes: