Common Issues with MODBUS TCP
How to determineif a Modbus TCPconnection is established? Answer: To performModbus TCPcommunication, a connection must be established. S7-200 SMART CPUas aModbus TCPclient: You can determine the connection status using the Modbus TCP Client instruction’s symbol table parameter mConnected, as shown in Figure 1. If mConnected=1, it indicates that the connection has been established, while mConnected=0 … Read more
