This section contains information on the following topics:
- Overview of the Modbus RTU communication (S7-300, S7-400)
- Modbus_Comm_Load: Configure communication module for Modbus (S7-300, S7-400)
- Modbus_Master: Communicate as Modbus master (S7-300, S7-400)
- Modbus_Slave: Communicate as Modbus slave (S7-300, S7-400)
- Frame structure (S7-300, S7-400)
- Error messages (S7-300, S7-400)