Condition: Item Type: PLC Display Color: Black Material: ABS Digital Display Digits: 4 Digit Working Voltage: DC 5-36V Interface: VCC: Positive Power Supply GND: Negative Pole of Power Supply COM: Negative Power Supply D+: Rs485 Data Communication A+ D-: Rs485 Data Communication B- Baud Rate: 1200bps/2400bps/4800bps/9600bps/19200bps/38400bps/57600bps/115200bps Default: 9600bps Examples of instructions: 1. Display data (00 32 decimal is 50, and negative numbers are represented by the inverse code. If ff fe is sent, -001 is displayed) 2. Set the position of the decimal point (the range is 01-03, 01 is the decimal point after the tens, 02 is the decimal point after the hundreds, 03 is the thousands, and only the tens and hundreds are displayed when it is negative) 3. Set the brightness (range 01-07, the larger the data, the brighter) 4. Set the baud rate (data range 0-7 corresponds to 1200 2400 4800 9600 19200 38400 57600 115200 respectively) Communication protocol: Modbus-RTU