C Control The I Unit-M Advanced 5 Vdc Inputs / outputs 16 x digital I/Os / 8 x analogue or digital I/Os Program memory 2 198805 Datenbogen

Produktcode

198805

ABS

ABS calculates the absolute value of a terms or a variable

MyFloat=ABS(FLOAT(ADC8*MyByte)*0.0196+MyFloat*MyFloat)

MyFloat= ABS(FLOAT(MyWord-MyByte*MyWord))/ABS(MyFloat+MyFloat/5)

COMPARES

A compare is always related to two variables. Compares of constants or terms are not allowed.
Valid compare operators are: <, >, =, <=, >=

IF MyFloat1>MyFloat2 THEN.....
IF FLOAT(MyWord) > MyFloat1 THEN......
LOOP UNTIL MyFloat1>MyFloat2
LOOP UNTIL FLOAT(MyWord) > MyFloat1
IF NOT(MyFloat1=MyFloat2) THEN.....

The operator <> is missing. An equivalent compare is done with:
IF NOT(MyFloat1=MyFloat2) THEN.....

FLOATING POINT ERRORS

Though calculations have to be done in a way that no illegal operations are processed (such as division by
zero) it may nevertheless happen that e.g a sensor malfunction leads to that. Because this can lead to
plausible rasults by all means, even the results are totally wrong, u can check your results for this cases of
errors.

ON ERROR GOTO MyErrorHandler

Adds an error request to the compiled program code and jumps to the error handler. The variable
ERR.NUMBER contains the error code. ERR.NUMBER is cleared before any floating point operation.

This example at the rightdemonstrates the usage. Continued
multiplication leads to an overflow, the errorhandler is called
and the error code is shown.

0 No error
1 Overflow error
2 Underflow error
3 Division by Zero error
4 Square root of negative
number
5 Number too large/small to
convert to integer

FUNCTION FPE()
ON ERROR GOTO ER
#x
RESULT=1
DO
RESULT=RESULT*100
LCD.POS 1,1
LCD.PRINT RESULT & " "
pause 20
LOOP
'-------- DISPLAY AN ERROR ---------------
#ER
LCD.POS 2,1
LCD.PRINT "ERROR:" & ERR.NUMBER
BEEP 5,5,50
LCD.POS 2,1
LCD.PRINT " "
goto x
END FUNCTION