integral time absolute error

Can any one please tell me how to make integral time absolute error block in matlab simulink before the PID controller as the operation of Genetic Algorithm ? And how to run this block i mean which code i have to apply to run this integral time absolute error block.

[Osman AKYUREK]

watch this video https://www.youtube.com/watch?v=N-pQUwWfa8Y . You can find your answer there.

Best