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Communication Protocol
The communication protocol is described below.
•When the
•When a computer has sent a command, the computer should wait “ACK” or “NAK” to be returned from the
•If a computer does not receive any return even after 1000 ms has elapsed since the transmission of a command, it means that the SRP- X700P has not received the command normally. A computer should
•A command transmission from a computer should be completed within 500 ms.
If transmission of a command cannot be completed within 500 ms, the command will not be processed and “NAK” will be returned.
•When a computer receives “NAK” during transmission of a command, a computer should stop sending the command immediately.
Handshake Code
ACK: 41[H] ( ‘A’ )
When the
Refer to Command Reference for details.
NAK: 4E[H] ( ‘N’ )
When the
DELIMITER: 0D[H] ( ‘CR’ )
The
Communication Packet Format
Communication packet has the variable data length.
A communication packet consists of command, parameter and delimiter as shown below.
Example; When selecting C with LINE4 SELECT.
43[H] 53[H] 45[H] 4C[H] 33[H] 0D[H] (‘C S E L 3 CR’)
1 Command
2Parameter
3Delimiter
1.Command
A command consists of the four bytes.
2. Parameter
Length of a parameter changes depending on command.
Refer to Command Reference for details.
3. Delimiter
The
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