Casio CDP-200R User Manual
Also see for CDP-200R: Product catalogUser guideAppendixService manual & parts listUser guide
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Contents
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3421.3 Handshake Mode Communication FlowA session starts with the receiving device sending a request using a HBR, or with the sending device sending HBS data.The sending device does not send the next packet until it receives an ACK from the receiving device. The maximum waittime of at least 2000 msec is reserved. Failure of a response to arrive within the wait time is treated as a timeout error,and data communication is terminated.The receiving devices returns ERR (error) when there is mismatch in the received data checksum or when an incompatibledata format is discovered. When the sending device receives ERR (error) from the receiving device, it resends the last datasent. If an error repeats a number of times (three times or more for this Instrument), either the sending device or the receivingdevice sends an RJC to terminate the session.A session ends after the sending device transfers the volume of data determined by the number of parameter sets beingtransferred, and sends EOD and EOS in response to an ACK from the sending device.Data Receiver Data Sender OperationHBR → Send Request (Optional)← HBS Data SendACK → Acknowledge← HBS Data SendACK → Acknowledge::ACK → Acknowledge← EOD End of Data:Other subsessions:← EOS End of Session |
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