需求
“Create an SFC where an ordered product is picked, then routed to either express or standard packaging before carrier pickup and reset after shipment.”
接著試試Add a gift-wrap branch.Add a quality-check step before shipping.
Alternative-branch SFC of an order-fulfillment routing decision. After picking the product, exactly one branch fires per scan based on the leftmost-true entry transition (priority 1 = express shipping first). Both branches converge to a common shipping step. Exercises the IEC 61131-3 §6.5.4 single-bar OR semantics, branch priority annotations, and per-branch entry/exit transitions.
“Create an SFC where an ordered product is picked, then routed to either express or standard packaging before carrier pickup and reset after shipment.”