2.1 General Rules for Commands
Chapter 2 RECEIVING FUNCTIONS
This chapter describes the program set commands and program control commands. Remember first to open a device by invoking the ESC O command before the set or control commands can be sent.
2.1 General Rules for Commands
A command is represented by ASCII codes and consists of an identifier, parameters, delimiters and a terminator.
Example: SR01, VOLT, 20 mV, 0, 10000 terminator
Parameters
Identifier
Identifier
• Defined by two alphabetical, capital letters.
Parameters
•Parameters must be separated by a delimiter (comma).
•Numeric data are displayed as integers (e.g., +20,
•When parameters are numeric, the effective setting ranges depend on these parameters.
•Spaces preceding and following a parameter and spaces within a parameter are ignored. Spaces within a parameter specified by ASCII characters (engineering units, tags, and messages) are valid.
•Parameters which do not need to be changed do not need to be specified. (E.g., the command “SR01,, 20mV” leaves the mode unchanged.)
•A string of delimiters at the end of the command/parameter string may be omitted (see the example below).
Example: The last four commas of
SR01, VOLT,,,, can be omitted.
•The lengths of the following parameters are fixed. If the length differs, a syntax error occurs.
- | Date and time: | YY/MM/DD (8 characters) |
|
| HH:MM:SS (8 characters) |
- | Channel: | CC (2 characters). For example, channel 1 must be entered as |
|
| “01.” |
Terminator
A command must end with either of the following terminators: CR + LF
or,
LF
For the open (ESC O) and close (ESC C) commands, only CR+LF can be used.
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