Casio IT-2000 Q and A, Common to Satellite and Master I/O Boxes, Satellite I/O Box

5.Q and A

Common to Satellite and Master I/O Boxes

Q1

It seems that it takes a rather long time for communication to start, doesn't it?

A1

Communication between the IT-2000 and Satellite/Master I/O Box is performed according to IrDA protocol. Generally, the IrDA protocol requires 2 to 3 seconds until communication between the PC and IT-2000 is established. This period of time is required for each IT-2000 terminal.

It may take more than 10 seconds for communication to start if multiple Satellite and Master I/O Boxes are connected under daisy-chain.

Q2

Which IrDA standard is used for communication between the IT-2000 and Satellite/Master I/O Box ?

A2

IrDA 1.0 is used for communication between the Satellite I/O Box and IT-2000, and IrDA 1.1 is used for communication between the Master I/O Box and IT-2000.

Q3

If multiple Satellite I/O Boxes and Master I/O Boxes are to be chain-connected, is there an order in which they must be connected?

A3

They do not have to be connected in any particular order, since, with the IrDA protocol, the next terminal to be connected is randomly selected each time communication has been completed up to the current terminal.

Satellite I/O Box

Q1

What happens if the power to a Satellite I/O Box connected in the middle of the daisy-chain is turned OFF ?

A1

Communication can only be performed between the PC and the Satellite I/O Boxes, which are located in the nearer positions to the PC delimited by the Satellite I/O Box having been powered off.

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