HMI and SCADA can work together but usually serve different levels of operator interaction and data management. The right architecture depends on the process, users, network, history, alarms, and responsibility boundaries.
Define the operator and data needs
Record local commands, equipment status, alarms, trends, recipes, users, locations, data retention, reporting, remote access, and network ownership. Separate machine-level HMI functions from site-wide supervisory functions.
Panel design implications
Review HMI mounting, power, heat, access, PLC interfaces, network, cable entry, backups, labels, and maintenance. Define who owns screen design, tag naming, alarm philosophy, historian, cybersecurity, and change control.
Checklist
- Operator tasks, locations, modes, alarms, and data.
- PLC, HMI, SCADA, network, historian, and access boundaries.
- Panel mounting, heat, power, cable, service, and documentation.
- Backups, revisions, manuals, records, and responsibility.
This comparison does not promise a software architecture or validated system.
ZH 
EN 
EN_ZA 
AR 
EN_GB 
DE 
ES 
FR 
IT 
JA 
TR 
RU 
EN_CA 
EN_AU 
NL 
PT 
FA