Two-Way Communication; One-Way Communication - Casio PX-150 Manual

A single session is concluded only when this Instrument returns an IPS (Individual Parameter Send)
in response to an IPR (Individual Parameter Request) from an external device, or when an external
device or this Instrument spontaneously sends an IPS. If this Instrument received an IPS, the value of
the applicable parameter is changed.
Depending on the function of a parameter, Individual Parameter Send may be used to issue a com-
mand to the Instrument or Individual Parameter Request may be used to check Instrument status
information.
16.1

Two-way Communication

16.1.1 Example : Data send in response to send request to the Instrument
Data Receiver
IPR ----->
<-----
16.2

One-way Communication

16.2.1 Example : Data send to Instrument from external source
Data Sender
----->
16.2.2 Example : Data send resulting from Instrument operation
Data Receiver
<-----
Data Sender
IPS Data Transfer
Data Receiver
IPS Data Transfer
Data Sender
IPS Data Transfer
Operation
Send Request
Operation
Operation
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