Casio AP-500 Implementation Manual

Also see for Privia PX-200: User guide

Contents

Casio AP-500 Implementation Manual Manual pdf 35 page image

3518.1.2 Session and SubsessionSubsessionOne Parameter Set can be transferred per subsession. Subsession transfers one Parameter Set or data that is broken downinto multiple packets for transfer, with EOD (End of Data) sent at the end to terminate the send.Data is divided into multiple packets when a single Parameter Set is larger than a certain size. The Packet Number in thepacket's index field is used to indicate the sequential position of a packet relative to the other packets. Even if ParameterSets are small, they cannot be grouped together and sent as a single packet. A Parameter Set delimiter is always treatedas a packet delimiter for transfer.SessionOne Parameter Set or multiple Parameter Sets can be transferred by one session. A session can consist of one subsessionor multiple subsessions, with EOS (End of Session) sent at the end to terminate the send.Regardless of whether there is a single Parameter Set or multiple Parameter sets, an actual bulk dump always takes theform of a session, never a subsession only.18.2 One-way Mode Communication FlowA session starts with the receiving device sending a request using an OBR, or with the sending device sending OBS data.The session ends after transfer of all the data in the parameter set being transferred by the sending device is complete.Data is divided into multiple packets of 256 bytes or less each, and transfers them at fixed intervals (20 msec).A final EOD informs the receiving device when the session is ended.Data Receiver(External Device)Data Sender(This Instrument)OperationOBR → Send Request (Optional)← OBS(20 msec or greater interval)Data Transfer← OBS(20 msec or greater interval)Data Transfer← OBS(20 msec or greater interval)Data Transfer::← EOD End of Data:Other subsessions:← EOS End of Session