The full operating chain: ERP order to billing trigger explained

A customer order begins in the ERP. It becomes useful at the terminal only when customer, product, vehicle, driver, tank, bay, delivery, and authorization data are aligned with the TAS or stock-management layer.

This is where many projects lose traceability. If the business order and terminal authorization do not share stable references, reconciliation becomes manual work at the end of the shift or month.

The TAS verifies the driver, vehicle, product, and bay. Access control confirms entry. PLCs and VFDs control pumps, valves, meters, presets, and loading logic. The Safety PLC stays independent and protects against critical conditions.

The control layer should receive clear authorization and return clear evidence. Operators need to know what was authorized, what physically happened, and what was stopped or interrupted.

As loading completes, actual loaded quantity flows back to TAS or the stock system, then to ERP. The same movement can update inventory, trigger billing, and feed reconciliation.

Digital Twin and KPI layers become credible only when the underlying event trail is consistent. Every link needs a timestamp, owner, and audit path.