SmartAXIS Touch User's Manual 22-7
5 User Communication
22
Communication
5.1 Overview
User Communication allows you to develop a communication protocol to transmit and receive data from an external
device, such as a bar code reader. The Touch supports the user communication with start and stop synchronization
(full duplex) and a maximum of 1,500 bytes of data transmission or reception.
User Communication is supported up to three interfaces of the Touch, either serial, Ethernet, or USB interfaces.
5 User Communication
Touch
External device
Data receptionData transmission
User communication
External device
PLC Link Communication
Up to 31 external devices can be connected when the serial interface is RS485. However, it is necessary to
thoroughly check command settings, error handling, and other detailed command specifications when
considering the capability of communicating with two or more external devices to decide the number of
external devices to be connected.
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