Robot Controllers: Centralised or Distributed
Compared
| Aspect | Centralised | Distributed |
|---|---|---|
| Commissioning | Simpler procurement, longer cable runs | |
| Shorter runs, more devices to coordinate | ||
| Fault finding | One place to look | |
| Requires a clear communication view | ||
| Expansion | Cabinet space becomes the constraint | |
| Add nodes without touching the main cabinet | ||
| Environment | Cabinet cooling and dust protection | |
| Nodes near the process need appropriate ratings |
Decision guidance
- Count the axes and the field devices before choosing an architecture.
- Check the network technology and cycle time requirement.
- Confirm which architecture the integrator can support locally.
Architecture choices are hard to change later. Decide before the layout is frozen.