From PLC Register to Live Dashboard: A Complete Workflow
You have a Siemens S7-1500 on the production line. It knows the cycle count, the reject rate, the motor current, and the oil temperature. But that data sits in PLC registers — invisible to SAP, invisible to management, invisible to the energy audit team.
Here's the complete journey to get that data from a PLC register to a live dashboard, step by step.
Step 1: Connect — Tag Discovery
The edge node connects to your PLC using its native protocol. For a Siemens S7-1500, that's OPC-UA. For Allen-Bradley, it's EtherNet/IP. For energy meters, it's Modbus TCP.
EdgeBits auto-discovers available tags. You browse the tag tree, select the ones you need (temperature, pressure, cycle count, motor current), set the polling interval, and you're reading live data within minutes.
Step 2: Transform — Edge Processing
Raw PLC data is noisy and high-frequency. You don't want to send 10,000 readings per second to the cloud. Instead, the edge processes it:
- Deadband filtering — Only send data when the value changes by more than a threshold (e.g., ±0.5°C)
- Aggregation — Compute 1-minute averages, min, max, and standard deviation
- Event engine — Trigger alerts when temperature exceeds 85°C or vibration exceeds 4.5 mm/s
- Enrichment — Tag data with machine ID, line number, shift, and batch from the production schedule
Step 3: Egress — Send Where It Matters
Processed data leaves the edge through one or more egress connectors:
- MQTT + Sparkplug B → Cloud UNS for real-time dashboards
- SAP RFC → Production order actuals in SAP PP
- REST/HTTP → Power BI, Grafana, or any custom BI tool
- CSV/SFTP → Tally or legacy ERP for billing reconciliation
All egress is outbound-only on port 443. No inbound firewall rules. No VPN. The edge polls the cloud — the cloud never reaches into the factory.
Step 4: Monitor — Edge Manager
Edge Manager gives you a unified view across all factories:
- Fleet overview — All edge nodes, their status, pipeline versions, last seen time
- Analytics — OEE trends, energy consumption, downtime Pareto charts
- Remote deploy — Push a new pipeline to 20 factories in one click
- Audit trail — Who changed what config, when, from which IP
"The whole setup — Modbus to live dashboard — took 4 hours. And when the internet dropped at the Faridabad plant, the edge just kept buffering. We didn't lose a single data point." — Plant IT Manager
That's the complete journey. PLC register → edge transform → live dashboard. No custom code. No SCADA upgrade. No VPN.