S7-200 and S7-300 Profibus-DP Communication
1. The S7-200CN CPU can connect to the DP network via EM277.
2. CPU315-2DP acts as the master station, while S7-200 CPU acts as the slave station.
3. Communication Issues
4. Hardware Configuration
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DP configuration for the master station, address is 2.
2. EM277 joins the DP network as a slave.
3. Configure EM277 slave address.
4. Select communication method as 8 bytes in and 8 bytes out, and also set the EM277 switch to position 3, consistent with the station.
5. Configure the DP network.
5. Master Station Program
1. EM277 offset parameter is 0.
2. The address correspondence is as follows:
3. Program
6. Slave S7-200 Program
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