Viewing Collection History
Values collected by the gateway are stored as time series data and can be used in the Graph / Analysis tools.
This gateway screen mainly displays "current values." The accompanying utility tools handle time-based graphing and history queries.
Which Tool Should I Use?
Look at the icons in the upper right corner of the gateway.
| Icon | Tool | Purpose | Default Port |
|---|---|---|---|
| Graph | Time Series Data Analyzer | Time series analysis / download of tag values | 7800 |
| Gauge | Advanced Dashboard (Grafana) | Create real-time dashboards | 3000 |
| Node.js logo | Node-RED | Data flow / post-processing / external integration | 1880 |
| System | System Management (Cockpit) | OS resources, network, service management | 9090 |
Clicking an icon opens the corresponding tool in a new window (the tool must be running on the same host as the gateway).
Time Series Data Analyzer (Port 7800)
You can specify a tag ID and time range to generate graphs or download CSV data.
For detailed usage, refer to the analyzer's own help documentation. This manual only covers how to find the tag ID.
Finding the Tag ID
- In the gateway [Connection] menu, click on the PLC
- Click on a row in the [Tag List] on the right to view its details — copy the tag ID from there
- Paste it into the analyzer
Tag ID format example: OPC_LS_XBM_0001_TAG_00001
Grafana Dashboard (Port 3000)
Use this when you need to create dashboards for operations/management meetings.
- Register the values sent by the gateway as a data source
- Drag and drop panels (graphs, gauges, single-value views, etc.) to arrange the layout
- Configure alarms and threshold notifications
The default login varies by environment, so contact your system administrator.
Node-RED (Port 1880)
Use this for complex processing (e.g., conditional branching, calculating a new value by combining two PLC values, sending notifications to an external API).
- Receives MQTT messages published by the gateway as input
- After processing, outputs back via MQTT, database, email, etc.
Data flows can be designed visually, allowing you to process data with almost no coding.
Frequently Asked Questions
Q. The graph tool won't open
- The tool must be installed on the same PC as the gateway to function.
- Check whether the PC's firewall is blocking the relevant ports (7800 / 3000 / 1880 / 9090).
- Ask your system administrator to confirm that the utility apps are running.
Q. I can't see older data
The gateway's time series storage period depends on the configuration (typically 30 days to 1 year). If you need a longer retention period, ask your system administrator to increase the "time series retention period (TTL)."
Q. I want to share this with people in other departments
You can create a Grafana dashboard and share its URL or embed it in your company portal. Note, however, this requires a corporate network where anyone can access the gateway IP.
Q. I want to retrieve the data and analyze it myself
You can query tag values and time series directly via the REST API. See Advanced — REST API for usage.