HY8200 User’s Manual
36
7.SCPI Introduction
本章主要涵盖以下内容：
Command String Parse
Command Parse Rule
Symbol Stipulation and Definition
Command Tree Structure
Command and Parameter
SYSTem Subsystem
CHANnel[:LOAD] Channel Control Subsystem(only for dual-channel)
ADDR Device Address Subsystem
*RST Subsystem
*IDN? Subsystem
ERRor Subsystem
7.1 Command String Parse
The host computer can send a string of commands to the instrument and the command parser of the instrument
starts to parsing after catching the terminator (\n) or an input buffer overflow.
For example
Valid command string:
AAA:BBB CCC;DDD EEE;:FFF
The instrument command parser is responsible for all command parsing and execution, and you must
understand its parsing rules before writing a program.
7.2 Command Parse Rule
1. IE command parser only parses and responds to ASCII data.
2. SCPI command string must be end with end mark NL(‘ \n’ ASCII 0x0A). The command parser starts to
executing when receive the end mark or an input buffer overflow.
3.If the command handshake is open, the command parser sends the character back to the host immediately
after each character is received, and the host can continue to send the next character only after receiving
this return character.
1. The command parser will terminate the parsing immediately after parsing an error, and the current command
will be invalidated.
2. After the command parser parses the query command, it terminates this command string parsing and the
subsequent strings are ignored.
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