GE 90-30/20/Micro manual Application Program Logic Scan or Solution

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Application Program Logic Scan or Solution

The application program logic scan is when the application logic program actually executes. The logic solution always begins with the first instruction in the user application program immediately following the completion of the input scan. Solving the logic provides a new set of outputs. The logic solution ends when the END instruction is executed (the END is invisible unless you are using a Hand-Held Monitor).

The application program is executed by the ISCP and the 80C188 microprocessor. In the Model 313 and higher CPUs, the ISCP executes the boolean instructions; and the 80C188 or 80386EX executes the timer, counter, and function blocks. In the Model 311 and 90-20 CPUs, the 80C188 executes all boolean, timer, counter, and function block instructions. On the Micro, the H8 processor executes all booleans and function blocks.

A list of execution times for each programming function can be found in Appendix A.

2-8 Series 90-30/20/Micro Programmable Controllers Reference Manual– September 1998 GFK-0467K