ISPSoft User Manual Suppose that Action0, Action1, and Action2 are executed during the activation of STEP_0, and will be executed until control is passed to STEP_2. After the control is passed to STEP_2, the execution of Action0 and the execution of Action2 will stop, and the system will execute final scans. Owing to the fact that Action1 is not qualified by R, it will still be executed after the control is passed to STEP_2. P (Pulse) During the first scan cycle, the P action associated with a step is executed when the step is activated. During the second scan cycle, even if the step is activated, the outputs will be disabled, and the system will execute a final scan.
During the first scan cycle, Action1 is executed when STEP_1 is activated. Owing to the fact that SM400 is ON, M1 and M2 are ON. During the second scan cycle, the system inactivates Action1. Although SM400 is still ON, M2 becomes OFF. M1 is driven by the instruction SET, and therefore it remains ON. P1 (Raising Pulse) The P1 action associated with a step is executed only when the step is activated during the first scan cycle. Besides, the system will not execute a final scan after the execution of the P1 action stops. Consequently, although an action where the instruction OUT or TMR is used is allowed to be qualified by P1, a warning appears when the program is compiled. 14-18