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 Hoja De Datos

 
To avoid annoing wrong results or even crashes split your computation into small termes, what makes the 
code better readable too. 
 
Stack overflow will cause wrong results and even a crash or other unpredictable behaviour of the C-
Control 
 

It is important to instruct the compiler that float values will have to be compiled. This is done with the 
compiler instruction  "OPTION FLOAT" , located the beginning of your program file. Remember that a float 
takes 4 bytes, and be carefull on use of too much variables of this type. The internal assigning of variables to 
the memory is done by the compiler automatically. The compiler also reserves further 16 bytes for internal 
use for the FP System. 

 

 
 
 
 
 

Now u can start to write a small program. This usually is done with assignment of variables used in  the 
program. The example shows the the different ways to do this. 
The FPM is capable to handle 7 digits, more digits are ignored. The exponent can range +-38 

 
 

 
 
 
 
 
 

The FPM has an INPUT function as it is usual for WORDs and BYTEs 
 
INPUT MyFloat ;  
Terminal input of a FP Value and move to MyFloat 
Because a FP value can be expressed in many different ways there are some regulations to consider: 
 
1) The leading ZERO in front of the decimal point must be written        0.001 (not: .001) 
2) The exponent must have two digits:                                                   0.234E03 (not: E3)  
3) After the decimal point one digit has to follow as a minimum            1234.0     (not:1234.)  
 
Beside this the input format is widely flexible as the examples show: 

 
 
 
 
 
 
 
 
 
 
 
An Input is terminated if the terminal sends 

CR or any other non numeric character. If your input device sends CR LF on termination u have to remove 
the LF (use getMyByte). Beside this all other considerations concerning the use of the serial interface are