Hello Shawn, question can I simulate these? I tried testing P_motor only with system tags in the inputs and single output. What happens is that I set my command inputs to 1 and 0 but the actual input signal in the block flips from 1 to 0 all the time like if something was interfering the instruction. The output can never set to 1, dont know why. My subroutine is enabled with a JSR instruction, Im online with my testing PAC no EMU. Seems odd.