MDS100-BW RS-485 LCD Display
The
MDS100-BW is specially designed to allow a host computer board, a master PLC or a PC to
display alphanumeric characters on its backlit 4 lines x 20 characters per line LCD display via RS485 bus. You can connect up to 255 MDS100-BW together to a master PLC
such as the T100MX+, the T100MD+ PLC or to a host PC. Each MDS100-BW can be programmed with a unique ID between 00-FF, and the master PLC is able to select which MDS100-BW to display what text simply by sending an ASCII string that includes the ID information of the display. Hence the MDS100-BW is ideal for implementing multiple remote displays for a host computer.
MDS100-BW comprises a daughter board (the “control board”) that is plugged onto the back (“piggy-backed”) of a high constrast, black characters on snow white background, 4 lines x 20 characters LCD module. The LCD module is rated for industrial temperature range of between -20oC to +70oC (-4oF to +158oF), making it suitable to be installed in some outdoor applications.
Messages to be displayed on the LCD are sent from the PLC to the MDS100-BW via their respective RS485 ports at either 38,400 or 9,600 bits per second, selected by the setting of Jumper J1 when power-on (see table). Always use the maximum baud rate (38,400bps for T100MX) for best performance. For short distances of less than 2m, any ordinary pair of cables can be used to connect the RS485 interfaces. Make sure that the “+” and “-” terminals of both RS485 terminals are correctly connected to each other.
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