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6-30 Keypad Programming MN1854
Logical Operators
Conditional commands (IF,WT, LU, LW) support logical operations of AND (&&)
and OR (||). Two expressions may be logically AND’d or OR’d within one
conditional command. For example:
(A)=5 (B)=2.5 IF(A)>2&&(B)=2.5 MS1, “True Statement” EB
In this program, the message “True Statement” appears since BOTH conditional
statements are true.
Increment/Decrement Variables
Four syntaxes are supported by variables: ++ (Single Increment), += (Value
Increment), –– (Single Decrement), –= (Value Decrement). These operators will
initialize any uninitialized variable to zero before incrementing or decrementing it
for the first time.
(Variable Name)++ Increments a variable value by 1
(Variable Name)+=n Increments a variable value by n
(Variable Name)– – Decrements a variable value by 1
(Variable Name)–=n Decrements a variable value by n
Expressions
Five conditional expressions are supported: less than (<), equal to (=), greater
than (>), less than or equal to (<=), and greater than or equal to (>=). The IF and
WT commands can use these expressions to direct program flow or wait for an
analog input to meet a condition. The > and < symbols are entered into the keypad
editor with the ALPHA+↑+↑...↑
Examples:
IF (X)>10 GS20 EB If X is greater than 10 gosub to program #20.
WT(AI12)<(MAX TEMP) Wait for the temperature to go below the maximum
before continuing command processing.
Other Programming Samples
These sample programs provide an idea of how to solve simple programming
tasks. To aid your program documentation, comments are placed in {brackets}.
These comments are stripped from the program as it is downloaded for execution
to help conserve memory. Files should be saved before downloading save the
comments.
Example:
DI10,2 GO Moves to load position
DI15,15 GO Moves to unload position