Adding S7 Parameters¶
An S7 parameter maps a single memory location on a Siemens PLC to a trackable data point in Enture. Once added, the platform reads the location continuously and makes the value available for dashboards, reports, alerts, and real-time views.
Before you begin¶
- The S7 Device must already exist.
- You need the Data Block (DB) number, byte offset, and value type for the memory location — this normally comes from the PLC program or your PLC programmer.
Steps¶
1. Open the S7 Device¶
In the left sidebar, go to Digital Twin → Devices and open the device you want to add a parameter to.
2. Add a parameter¶
Click Add Parameter.
3. Fill in the parameter details¶
| Field | Description |
|---|---|
| Name | A descriptive name for this data point (e.g. Spindle Speed, Part Count) |
| DB Number | The Data Block number where the value is stored |
| Byte Offset | The byte offset within the Data Block where the value starts |
| Value Type | The data type of the value: Bool, Integer, Real, Dint, Lint, or String |
| Bit Offset | (Shown only when Value Type is Bool) Which bit within the byte holds this value (0–7) |
| Data Length | The length of the value in bytes (relevant for String and multi-byte types) |
| Unit | The engineering unit (e.g. rpm, °C). Optional. |
| Data Processing | Average (mean of samples over the period), Difference, or Negative Difference |
| Description | Notes about this parameter |
4. Common settings¶
Correction Factor, Idle Latency, Entropy, and the related checkboxes (Enable Entropy, Limit Entropy, Remove Negative Entropy, No Zero Read, Remove Decimal, Restrict User Access, Calculate Consumption, Disabled) work the same way as on every other protocol — see Common Parameter Settings for details.
5. Save¶
Click Create. The parameter is added to the device.
What happens next¶
The edge device receives the updated parameter list within approximately 30 seconds and begins reading the memory location.
Viewing live data¶
- Navigate to Digital Twin → Devices → open the device.
- Click on the parameter name.
- The parameter detail page shows the current value and a real-time chart.
Tip
If you do not see data arriving after a few minutes, verify that:
- The DB number, byte offset, and value type match the PLC program exactly.
- The PLC's IP address, rack, and slot are correct and reachable from the edge device.
- The PLC firewall (if any) allows S7comm connections on port 102 from the edge device.