Wiring diagrams
Terminal description
| Terminal block | Instructions | |
| R1+ | COM1 serial port RS422 signal receive+ | COM1 serial port RS485 signal B |
| T1+ | COM1 serial port RS422 signal transmit+ | -- |
| R1- | COM1 serial port RS422 signal receive- | COM1 serial port RS485 signal A |
| T1- | COM1 serial port RS422 signal transmit - | -- |
| R2+ | COM2 serial port RS422 signal receive + | COM2 serial port RS485 signal B |
| T2+ | COM2 serial port RS422 signal transmit + | -- |
| R2- | COM2 serial port RS422 signal receive - | COM2 serial port RS485 signal A |
| T2- | COM2 serial port RS422 signal transmit - | -- |
| R3+ | COM3 serial port RS422 signal receive + | COM3 serial port RS485 signal B |
| T3+ | COM3 serial port RS422 signal transmit + | -- |
| R3- | COM3 Serial Port RS422 signal receive - | COM3 Serial Port RS485 signal A |
| T3- | COM3 Serial Port RS422 signal transmit - | -- |
| R4+ | COM4 Serial Port RS422 signal receive + | COM4 Serial Port RS485 signal B |
| T4+ | COM4 serial port RS422 signal transmit + | -- |
| R4- | COM4 serial port RS422 signal receive - | COM4 serial port RS485 signal A |
| T4- | COM4 serial port RS422 signal transmit - | -- |
| R1 | COM1 serial port RS-232 receive data input | |
| T1 | COM1 serial port RS-232 transmit data output | |
| R2 | COM2 serial port RS-232 receive data input | |
| T2 | COM2 serial port RS-232 transmit data output | |
| R3 | COM3 serial port RS-232 receive data input | |
| T3 | COM3 serial port RS-232 transmit data output | |
| R4 | COM4 serial port RS-232 receive data input | |
| T4 | COM4 serial port RS-232 transmit data output | |
Parameter Description
By default, there are 4 groups of serial port configuration parameters, corresponding to 4 serial ports. All parameter changes take effect immediately without powering off or restarting, as shown below:
| Parameters | Instructions |
| Duplex Mode | 0: Full Duplex (RS232/RS422) 1: Half Duplex (RS485) |
| Baudrate | Baud Rate: 0:1200 1:2400 2:4800 3:9600 4:19200 5:38400 6:57600 7:115200 |
| Data Bit | Data bit: 0:8 bits 1:7 bits |
| Stop Bit | Stop bit: 0:1 bit 1:2 bits |
| Parity Bit | Parity bit: 0: No parity 1: Odd parity 2: Even parity |
| ReceiveTimeout | Serial port receive timeout: 5-200 (unit: ms) If the value is out of range, it shall be calculated as the maximum value, e.g., a value exceeding 200 is calculated as 200. |
| Modbus Master ResponseTimeout | Modbus RTU master mode response timeout If the slave station fails to respond within the set time, it is judged as a communication timeout. 5-5000 (unit: ms) If the value is out of range, it shall be calculated as the maximum value, e.g., a value exceeding 5000 is calculated as 5000. |
| Modbus Master Scan Time | Modbus RTU master mode polling time The interval between the completion of one command and the next in MBS master mode Unit: ms |