Article - CS308343
Performance issues in communication with Siemens S7-1500, S7-1200 through OPC UA Client driver in KEPServerEX / ThingWorx Industrial Connectivity
Modified: 23-Sep-2025
Applies To
- Kepware Server (formerly KEPServerEX) 6.0.2207.0 to 6.17
- ThingWorx Kepware Server (legacy) 8.0 to 6.17
- Driver: OPC UA Client
Description
- Performance issues in communication with Siemens S7-1500 and S7-1200 through OPC UA Client driver in KEPServerEX / ThingWorx Industrial Connectivity (KSE/TWIC)
- The event log is full of communication errors
Bad Out or Memory (0x80030000)
Bad Invalid Session (0x80250000)
Bad Invalid Session (0x80250000)
- The communication goes up and down
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