The CP 343-1 Lean is a communication processor that connects SIMATIC S7-300/C7-300 controllers to industrial Ethernet and supports PROFINET IO. It integrates a 2‑port Ethernet switch and offers various communication services such as SEND/RECEIVE, FETCH/WRITE, and SNMP.
This manual covers the processor’s attributes, installation and commissioning steps, LED indicators, performance data, configuration as a PROFINET IO device, web diagnostics, firmware loading procedures, technical specifications, and safety notes. It also includes compatibility information and troubleshooting guidance. This manual is written in Chinese.
| Transmission rate | 10 Mbps and 100 Mbps |
|---|---|
| Ethernet interface | 2 × RJ‑45 connectors |
| Power supply | DC +24 V (allowed range +20.4 V to +28.8 V) |
| Maximum current consumption | 200 mA |
| Dimensions (W × H × D) | 40 mm × 125 mm × 120 mm |
| Operating temperature | 0 °C to +60 °C |
| Storage temperature | -40 °C to +70 °C |
| Maximum altitude | 2000 m |
Use the firmware loading program supplied with STEP 7/NCM S7, connect via an industrial‑Ethernet CP module (e.g., CP 1613) or a module with the Softnet package, and start the download using the CP’s activated MAC address.
When the lease expires and no new IP address is assigned, the CP enters STOP state, loses its IP address, and all communication connections are terminated.
The CP can detect a duplicate IP address; after correcting the address conflict, the CP must be restarted to resume operation.
During firmware download the SF LED (red) flashes, indicating the download is in progress; once completed the LED turns solid, and if the download fails the BF LED (red) lights.