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RC4000 Antenna Controller
State Diagram
The state diagram illustrated below presents the implementation of the slave device that guarantees the
proper transfer and processing of communication messages sent by a master controller. Each state that
the device can assume is represented graphically as a circle. A single-digit number is used within the
circle to identify the state. All transitions between states are represented graphically by arrows between
them. Each transition is qualified by conditions that must be true in order for the transition to occur.
State Descriptions
•
State 1 – Idle State
The device is ready to receive a new message. A device always powers on in State 1.
o
The device will enter State 2 only if the STX byte is received.
o
•
State 2 – Addressed State
The device is waiting to receive the address byte.
o
The device will enter:
o
State 3 if the received address byte is correct.
State 1 if the received address is not correct.
The device will stay in State 2 if the STX byte is received.
o
Appendix REM
Figure 2 – SA Bus Protocol State Diagram
REM-4
Remote Control Option
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