Communication Interface

Interfaces

Smart LCD provide 5 kind of communication interface which depends on model.

RS-232C interface

• the major application interface in TOPWAY Smart LCD Series
• provides versatile on screen UI function features of TOPWAY Smart LCD
• receives command from host motherboard and provides response
• uses standard RS-232C signaling
• TOPWAY serial commands protocol (same as UART interface)

UART interface

• available as an individual TOPWAY Smart LCD product
• provides the same versatile on screen UI features
• uses 3.3V logic levels UART signaling
• TOPWAY serial commands protocol (same as RS-232C interface)

RS-485 MODBUS Host interface

• available as an individual TOPWAY Smart LCD product
• provides the same versatile on screen UI features
• working as a MODBUS host device
• uses standard RS-485 signaling
• with MODBUS protocol
• support programable script to access (R/W) MODBUS slave devices

RS-485 MODBUS Slave interface

• available as an individual product of TOPWAY Smart LCD
• provides the same versatile on screen UI features
• uses standard RS-485 signaling
• with MODBUS protocol
• support direct mapping the MODBUS address with internal VP_N16 variable

Ethernet interface

• available as an individual product of TOPWAY Smart LCD
• provides the same versatile on screen UI features
• uses standard ethernet signaling
• with TCP/IP protocol
• accept TOPWAY serial commands