A: 1. From the perspective of program editing: Use polling to trigger the ModbusRTU communication read and write instructions. For read and write instructions, use the rising edge trigger (↑) to avoid continuous reading and writing occupying the channel.
2.  From the perspective of communication settings: Change the communication timeout of the PLC (the default communication timeout for some models is 1000ms) to avoid cumulative delays in communication information transmission due to multiple communication timeouts.