PLC communication can be divided into communication between PLC and external devices, as well as communication between PLC and internal system devices based on device classification. Depending on the communication objects, it can be further divided into the following situations.Communication Between PLC and External Devices:1. Communication between PLC and computers: Communication between PLC and the … Read more
Overview of RS232 The RS-232 interface complies with the serial data communication interface standard established by the Electronic Industries Alliance (EIA). The original designation is EIA-RS-232 (abbreviated as 232, RS232). It is widely used for external connections of computer serial interfaces, including connection cables, as well as mechanical, electrical, signal, and transmission processes. The RS-232-C … Read more
RS-485 belongs to wired transmission, so it requires a hardware transmission medium, which can actually be just two wires. The signal transmitted over these two wires is the same; the sender splits this signal into two, but the receiver restores it to the original signal. The advantage of this method can be compared with RS-232; … Read more