Model VP-EC-RDU-MINI Modbus RTU LCD Display 4 Line x 20 Character, RS485, with Temperature Sensor
The VP-EC-RDU-MINI Remote Display by VP Process Inc. is the perfect addition to any controls system or project that uses the MODBUS RTU protocol and RS485.
The easy to read 4 line x 20 character display is simply written to by writing the applicable holding registers. The three user buttons can be read and can be programmed for different functions as required by the user's application. Arduino and Raspberry Pi projects can also use the VP-EC-RDU-MINI when using the Arduino and Raspberry Pi serial ports as RS485.
As an added Bonus, the VP-EC-MINI has an on board temperature sensor (10K Thermistor) which can also be read by Modbus Functions.
For complete details on all of our Modbus Interfaces, please visit our website at www.vpprocess.com
Low Power (9 - 24 VDC typical, max 28 VDC)
LCD Display 4 Line x 20 Character, White Characters, Blue Background (Other colors available upon request)
Blue Power On Led
3 User Pushbuttons (Up, Down, Enter)
RS485 Interface 2 RJ45 (Cat5e), 2 x 4 Pt. Terminal Block
4x20 LCD Backlight Programmable Always ON, Timed Off
Simple Operation Read and Write Modbus Holding Registers
Dimensions 3.9" x 2.4" x 1.5"
Microchip PIC18F Series Processor c/w ICSP connection
Arduino and Raspberry Pi compatible when using RS485 with Arduino and Raspberry Pi projects
Function 03 - Read Holding Registers
Function 16 - Write Holding Registers
Display Connected to Raspberry Pi with RS485 Connection
Controller Module - VP-EC-RDU-MINI Rear View
Programming the VP-EC-RDU-MINI
To enter Program mode, the three pushbuttons are pressed all at once. Once entered, the programmable menu's are password protected. After entering the 4 digit PIN number (defaults to 0000 from the factory) is entered, the following items can be programmed:
Modbus ID (Values 1 thru 253)
Baud Rate (9.6K, 19.2K, 5764K 115.2K)
LCD Backlight Enable (Modbus Control)
Menu Reset Time (Seconds before reverting to normal operation if PB's not pressed)