Opticon RFS 6000 - Manual (Page 14)

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ET UP MANUAL
RFS 6000
14
Transmit a message from RF-device to host:
Sender = RFS6000
Receiver = Host
Transmit a message Host to RF-device:
Sender = Host
Receiver = RFS6000
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->
Sender first sends an enquiry character to indicate that it
wants to send a message
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<-
Receiver responds that it is ready to receive the message
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->
Sender sends a 'start of transmission’ sequence.
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->
...message... Sender sends the message, with the format as described above.
When a byte in the message is equal to DLE, an extra DLE is
sent, to indicate that this DLE byte is part of the data.
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->
Sender sends a 'end of transmission’ sequence.
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->
Sender sends a 'block check character'. This byte is the
logical X-OR over all the bytes, starting with the
sequence.
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<-
Receiver has to respond with ACK, if the message was
received. (the BCC is found to be correct)
<-
Receiver has to respond with NAK, if the message was not
received correctly. (the BCC is found to be incorrect)
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