Integral (FB)

FUNCTION_BLOCK Integral

This function block will approximate the integral function of the fuction over the time interval between the first function call and the actual time : . The size of the time intervals are integers and measured in micro seconds. The approximation is carried out by use of the explicit () resp. implicit () Euler method:

InOut:

Scope Name Type Initial Comment Input xEnable BOOL   reset lrInputValue LREAL   function value (corresponds to :math`x`) udiTM UDINT   size of time interval (equals time passed since last call to function) Output lrIntegral LREAL   approximated value of integral xOverflow BOOL FALSE error flag TRUE: If an overflow has occured