Edge role
Edge software can collect protocols close to equipment, normalize tags, buffer data and publish events upward through supported interfaces.
Contextualization
A vibration value or counter is not automatically a production event. MES needs to know which resource, order, product or operation the signal belongs to.
Avoid unnecessary volume
High-frequency telemetry is often better stored in historians or time-series platforms, while MES receives state changes, results or summarized values needed for execution.
Security boundary
New edge gateways create credentials, software, network paths and update responsibilities. Treat them as managed OT assets rather than invisible middleware.
MES terminology and boundaries vary among plants and vendors. Validate data ownership, safety impacts, interfaces and change control against your actual manufacturing architecture and approved procedures.