Phonetics Sensaphone SCADA 3000, Руководство пользователя

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Example:
main ()
{
if (read_uaf(input,0,0)>100.0) /*If input 0 on main
board is greater than 100 */
{
write_uaf(output,0,0,on); /* then set relay
output 0 on the main board to on */
}
}
RESET FUNCTION - Used to reset (acknowledge) the specified alarm in the SCADA 3000.
Summary:
int reset(x)
int x; alarm number: 0-63
Description
The reset function is used for acknowledging any alarm in the unit. The parameter of the func-
tion specifies the alarm number to be acknowledged.
RETURN VALUE - The reset function always returns a zero.
Example:
main ()
{
if (read_uaf(input,0,0)==1) /*If input 0 on main
board is closed */
{
reset (0); /* then acknowledge alarm 0 */
}
}
POWER FUNCTION - Mathematical function used to raise a value to the specified power.
Summary:
float pow (x,y);
float x:
float y;
Description
The Power function is used to raise a value X to the power specified by Y. The X parameter is
the operand and the Y parameter is the exponent.
RETURN VALUE - The Power function returns x raised to the y power.
Example : The following program will take the square root (1/2 power) of the value
of input 3 on the main board and store it in the variable c.
float a;
float b;
float c;
main()
{
a=read_uaf(input, 0.3);
b=1/2;
c=pow(a,b);
}
16-9
Chapter 16: Programming in C