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18
Parameter Operations
There are two parameter operations: Individual Parameter Transfer and Individual Parameter Request.
A single session is concluded when this Model sends an IPC (Individual Parameter Change) in response to an IPR
(Individual Parameter Request) from an external device, or when an IPC is sent by an external device or this
Model on its own (not in response to an IPR). Receipt of an IPC by this Model causes the corresponding
parameter to be changed.
An Individual Parameter Change can also be used to issue some command to this Model, and the Individual
Parameter Request can be used to check this Model's status information.
Data Receiver
IPR →
← IPC
See "Part V Parameter List" for information about what kinds of parameters are actually sent.
19
Parameter Set Transfer Protocols
19.1
Communication Protocols
Parameter sets can be transferred by bulk dump, using the message exchange types described below.
•
One-way protocol parameter set send/receive
•
One-way protocol parameter set send request send/receive
•
Handshake protocol parameter set send/receive
•
Handshake protocol parameter set send request, receive rejected, error notification send/receive
With the One-way protocol, the sending device sends data and ends the session without regard to the response of
the receiving device. This protocol is best for one-way transfers from a sequencer or similar device.
With the Handshake protocol, the sending device sends the data and then waits for a response from the receiving
device before advancing to the next session. This is a high-speed protocol in which there is no time wasted
waiting.
Important!
Though one-way protocol is defined, this Model does not have a parameter set that corresponds to one-way
protocol
See "VI Parameter Set List" for information about how parameter sets are actually allocated.
In order to ensure maximum speed for bulk dumping of a parameter set, the data format is different from the data
format used for Individual Parameter Change. Data is transferred as-is, using this Model's memory image.
One parameter set can be transferred per session. A large parameter set can be divided into multiple packets for
transfer. In this case, the index field is used for partition information.
When transferring multiple groups of small parameter sets, each parameter set must be allocated to its own packet.
Multiple parameter sets cannot be included within the same packet.
Data Sender
Send Request (Optional)
Operation
Data Transfer
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