100 • Chapter 7 Application Programming DMC-1000
Example - Bad Command
Instruction Interpretation
#BEGIN Begin main program
IN "ENTER SPEED", SPEED Prompt for speed
JG SPEED;BGX; Begin motion
JP #BEGIN Repeat
EN End main program
#CMDERR Command error utility
JP#DONE,_ED<>2 Check if error on line 2
JP#DONE,_TC<>6 Check if out of range
MG "SPEED TOO HIGH" Send message
MG "TRY AGAIN" Send message
ZS1 Adjust stack
JP #BEGIN Return to main program
#DONE End program if other error
ZS0 Zero stack
EN End program
The above program prompts the operator to enter a jog speed. If the operator enters a number out of
range (greater than 8 million), the #CMDERR routine will be executed prompting the operator to enter
a new number.
Mathematical and Functional Expressions
Mathematical Expressions
For manipulation of data, the DMC-1000 provides the use of the following mathematical operators:
OPERATOR FUNCTION
+ Addition
- Subtraction
* Multiplication
/ Division
& Logical And (Bit-wise)
| Logical Or (On some computers, a solid vertical line appears as a broken line)
() Parenthesis
The numeric range for addition, subtraction and multiplication operations is +/-2,147,483,647.9999.
The precision for division is 1/65,000.
Mathematical operations are executed from left to right. Calculations within a parentheses have
precedence.
Examples of MATHEMATICAL EXPRESSION
SPEED=7.5*V1/2 The variable, SPEED, is equal to 7.5 multiplied by V1 and divided by 2
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