The Supported Quantity Structure for SIMATIC S7 Connector is as follows:
| Connection Type | Acquisition Cycle (ms) | Publish Mode | Maximum Configurable Tags |
|---|---|---|---|
| S7-Protocol (S7-300/400/1200/1500) | 1000 | Bulk | 6000 |
| Optimized S7-Protocol (S7-1200/1500) | 1000 | Bulk | 6000 |
| S7-Protocol (S7-300/400/1200/1500) | 100 | Bulk | 600 |
| Optimized S7-Protocol (S7-1200/1500) | 100 | Bulk | 600 |
The maximum connection supported by each driver is as follows:
- S7-Protocol (S7-300/400/1200/1500): 20
- Optimized S7-Protocol (S7-1200/1500): 20
Test conditions
Mqtt Clients: The benchmarking result was obtained using one MQTT publisher client (S7 Connector) and one lightweight MQTT subscriber client (open source MQTT Node.js client) in a test run of five hours. For a higher number of publishers or subscribers, the supported tags are lower.
Connections: The benchmarking result was obtained with below mentioned number of connections:
- S7-Protocol (S7-300/400/1200/1500): 4
- Optimized S7-Protocol (S7-1200/1500): 8
Above quantity structure can be achieved by keeping number of connections less in the Bulk Publish mode. For higher number of connections, the supported tags are lower.
Optimized S7-Protocol NFR was performed with PLC Type: S7-1500; CPU:1516-3 PN/DP; V2.8 to get the optimal result.