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148
Algorithm Language Reference
The Operations
Symbols
Many of the operation symbols are the same, and are used the same way as
those in BASIC. However there are differences, and they can cause
programming errors until you get used to them.
The Arithmetic Operators
The arithmetic operators available to the HP E1415 are the same as those
equivalents in BASIC:
+
(addition)
-
(subtraction)
*
(multiplication)
/
(division)
Unary Arithmetic
Operator
Again same as BASIC:
-
(unary minus)
Examples:
a = b + (-c)
+
(unary plus)
a = c + (+b)
The Comparison
Operators
Here there are some differences.
BASIC
’C’
Notes
=
(is equal to)
==
Different (hard to remember)
<> or #
(is not equal to)
!=
Different but obvious
>
(is greater than)
>
Same
<
(is less than)
>
Same
>=
(is greater than or equal to)
>=
Same
<=
(is less than or equal to)
<=
Same
A common ’C’ programming error for BASIC programmers is to
inadvertently use the assignment operator "=" instead of the comparison
operator "==" in an if statement. Fortunately, the HP E1415 will flag this as
a Syntax Error when the algorithm is loaded.
The Logical Operators
There are three operators. They are very different from those in BASIC.
BASIC
Examples
’C’
Examples
AND
IF A=B AND B=C
&&
if( ( a == b )&&( b == c ) )
OR
IF A=B OR A=C
| |
if( ( a == b ) | | ( a == c ) )
NOT
IF NOT B
!
if ( ! b )
Conditional
Execution
The HP E1415 Algorithm Language provides the if - else construct for
conditional execution. The following figure compares the elements of the ’C’
if - else construct with the BASIC if - then - else - end if construct. The
general form of the if - else construct is:
if(expression) statement1 else statement2
where statement1 is executed if expression evaluates to non-zero (true), and
statement2 is executed if expression evaluates to zero (false). Statement1
and/or statement2 can be compound statements. That is, multiple simple
statements within curly braces. See Figure 5-1
Содержание VXI 75000 C Series
Страница 2: ......
Страница 16: ...16 ...
Страница 18: ......
Страница 30: ...30 Getting Started Chapter 1 Notes ...
Страница 32: ...32 Field Wiring Chapter 2 Figure 2 1 Channel Numbers at SCP Positions ...
Страница 44: ...44 Field Wiring Chapter 2 Figure 2 11 HP E1415 Terminal Module ...
Страница 54: ...54 Field Wiring Chapter 2 Notes ...
Страница 61: ...Programming the HP E1415 for PID Control 61 Chapter 3 Programming Overview Diagram ...
Страница 124: ...124 Creating and Running Custom Algorithms Chapter 4 Figure 4 2 Algorithm Operating Sequence Diagram ...
Страница 136: ...136 Creating and Running Custom Algorithms Chapter 4 Notes ...
Страница 152: ...152 Algorithm Language Reference Chapter 5 Notes ...
Страница 304: ...304 HP E1415 Command Reference Chapter 6 Command Quick Reference Notes ...
Страница 308: ...308 Specifications Appendix A Thermocouple Type E 200 800C SCPs HP E1501 02 03 ...
Страница 309: ...Specifications 309 Appendix A Thermocouple Type E 200 800C SCPs HP E1508 09 ...
Страница 310: ...310 Specifications Appendix A Thermocouple Type E 0 800C SCPs HP E1501 02 03 ...
Страница 311: ...Specifications 311 Appendix A Thermocouple Type E 0 800C SCPs HP E1509 09 ...
Страница 312: ...312 Specifications Appendix A Thermocouple Type E Extended SCPs HP E1501 02 03 ...
Страница 313: ...Specifications 313 Appendix A Thermocouple Type E Extended SCPs HP E1508 09 ...
Страница 314: ...314 Specifications Appendix A Thermocouple Type J SCPs HP E1501 02 03 ...
Страница 315: ...Specifications 315 Appendix A Thermocouple Type J SCPs HP E1508 09 ...
Страница 316: ...316 Specifications Appendix A Thermocouple Type K SCPs HP E1501 02 03 ...
Страница 317: ...Specifications 317 Appendix A Thermocouple Type R SCPs HP E1501 02 03 ...
Страница 318: ...318 Specifications Appendix A Thermocouple Type R SCPs HP E1508 09 ...
Страница 319: ...Specifications 319 Appendix A Thermocouple Type S SCPs HP E1501 02 03 ...
Страница 320: ...320 Specifications Appendix A Thermocouple Type S SCPs HP E1508 09 ...
Страница 321: ...Specifications 321 Appendix A Thermocouple Type T SCPs HP E1501 02 03 ...
Страница 322: ...322 Specifications Appendix A Thermocouple Type T SCPs HP E1508 09 ...
Страница 323: ...Specifications 323 Appendix A 5K Thermistor Reference SCPs HP E1501 02 03 ...
Страница 324: ...324 Specifications Appendix A 5K Thermistor Reference SCPs HP E1508 09 ...
Страница 325: ...Specifications 325 Appendix A RTD Reference SCPs HP E1501 02 03 ...
Страница 326: ...326 Specifications Appendix A RTD SCPs HP E1501 02 03 ...
Страница 327: ...Specifications 327 Appendix A RTD SCPs HP E1508 09 ...
Страница 328: ...328 Specifications Appendix A 2250 Thermistor SCPs HP E1501 02 03 ...
Страница 329: ...Specifications 329 Appendix A 2250 Thermistor SCPs HP E1508 09 ...
Страница 330: ...330 Specifications Appendix A 5K Thermistor SCPs HP E1501 02 03 ...
Страница 331: ...Specifications 331 Appendix A 5K Thermistor SCPs HP E1508 09 ...
Страница 332: ...332 Specifications Appendix A 10K Thermistor SCPs HP E1501 02 03 ...
Страница 333: ...Specifications 333 Appendix A 10K Thermistor SCPs HP E1508 09 ...
Страница 334: ...334 Specifications Appendix A Notes ...
Страница 346: ...346 Glossary Appendix C Notes ...
Страница 388: ...388 Generating User Defined Functions Appendix F Notes ...
Страница 438: ...438 Index Writing the algorithm 129 values to CVT elements 120 values to the FIFO 121 Z ZERO CALibration ZERO 194 ...