<JLIP technical information>

Basic method of device control

Command and response JLIP device is transmitting and receiving 11 bytes data each other. It is always that master device tarnsmit command frame at first. And the slave device makes a response to it. The slave device never transmit data without receiving command frame from master device. So, the master should wait the response from the slave device after transmitting command frame. Multiple device control JLIP system is possible to connect many devices to only one serial port of master device. Command frame has 'Command header' data for slave devide to recognize it. And 'ID number' data shows which slave device the target is. Each device that has each different ID number is possible to select and control one. Broadcast command ID number is normally set to one of number from 1 to 99. But, if it is set to 127, then its command frame is for all slave device. So, 127 is called broadcact ID number, and the command frame with it is called broadcast command. If broadcast command is transmitted, there is no response from any slave devices. And after a decided time elapsed, the master device can transmit a new command frame.

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