Carton sealing sequence (SFC)

A carton sealing SFC makes the order of a packaging station easy to inspect. The sequence waits for a carton, moves it into position, folds the flaps, applies tape and discharges the sealed carton. Each operation has its own step and completion condition, so the chart describes both the actuator that should run and the signal that allows the next operation. This is useful when controls engineers, mechanical designers and line operators need a shared description of the station. Add timer supervision, guarding permissives, jam detection and reject handling as the machine design requires. The resulting chart can form part of a PLC functional specification or a commissioning checklist.