S7 Log (Siemens Data)
The S7 Log tab displays in real-time the values of variables read from the connected Siemens S7 controller.
Optional Module
This feature requires the "S7 Connector" module to be enabled and prior variable configuration in the "S7 Configuration" tab.
Accessing S7 Logs
- Access your equipment page
- Click on the "S7 Log" tab
Interface Overview
Variable Table
The interface displays a table with:
| Column | Description |
|---|---|
| Name | Variable identifier |
| DB | Data block number |
| Offset | Position in DB |
| Type | Data type (BOOL, INT, REAL...) |
| Value | Current value read |
| Timestamp | Date/time of last reading |
Connection Indicator
A badge indicates S7 connection status:
| Status | Description |
|---|---|
| 🟢 Connected | Active reading from controller |
| 🔴 Disconnected | No communication |
| 🟡 Waiting | Connection attempt |
Data Refresh
Values are automatically updated according to configured interval (default: 1 second).
Manual Refresh
Click the "Refresh" button to force an immediate reading.
Reading History
If history is enabled for S7 variables, you can:
- View past values
- View charts in the "Analysis" tab
- Export data
Filter Variables
Use the search bar to filter variables by name.
Export Data
- Click on "Export"
- Select format (CSV, Excel)
- Choose period
- Download file
Troubleshooting
No values displayed
- Verify S7 connection is established (S7 Configuration tab)
- Ensure variables are synchronized
- Check equipment is online
Frozen values
- Siemens controller may be stopped
- Network connection may be interrupted
- Check equipment logs
Tip
Compare displayed values with those in TIA Portal/Step 7 to validate configuration.