Matrix Orbital MOS-AL162F - Manual (Page 13)

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7.3 Communication
When communication of either text or commands is interrupted, try the steps below.
• First, check the communication cable for continuity. If you don't have an ohm meter, try using a
different communication cable. If you are using a PC try using a different Com Port.
• Next, please ensure that the display module is set to communicate on the protocol that you are
using, by checking the Protocol Select Jumpers.
• In serial protocol, ensure that the host system and display module are both communicating on
the same baud rate. The display will communicate at either 9600bps or 19200bps only.
• Match Rx from the MOS-AL162F to the transmitting pin from your host and the Tx pin to the
receiving pin.
• Unlock the display. See the Set and Save Data Lock command for more info.