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7.5.4. Command Repeat
The backslash character “\” will cause the last command to be repeated.
7.5.5. Checksum
The user may add a checksum (optional) to the end of the command. The checksum is
“$” followed by two hex characters. If a command or a query has a checksum, the
response will also have one. There is no CR between the command string and the “$”
sign.
Example: STT?3A
STAT?$7B
7.5.6. Acknowledge
The power supply acknowledges received commands by returning an “OK” message. If
an error is detected the power supply will return an error message. The rules of
checksum also apply to the acknowledge.
7.5.7. Error Message
If an error is detected in command or query, the power supply will respond with an error
message. Refer to Section 7.6 for details.
7.5.8. Backspace
The backspace character (ASCII 8) clears the last character sent to the power supply.
7.6.
Error Messages
The power supply will return error messages for illegal commands and illegal programming
parameters. Refer to Table 7-1 for programming error messages and Table 7-2 for
command error messages.
Table 7-1: Programming Error Messages
Error
Code
Description
E01
Returned when program voltage (PV) is programmed above acceptable range.
Example: PV above ‘105% of supply rating’ or PV above 95% of OVP setting’.
E02
Returned when programming output voltage below UVL setting.
E04
Returned when OVP is programmed below acceptable range.
Example: OVP less than “5% of supply voltage rating’ plus ‘voltage setting’.
E06
Returned when UVL is programmed above the programmed output voltage.
E07
Returned when programming the Output to ON during a fault shut down.
Table 7-2: Commands error messages
Error
Code
Description
C01
Illegal command or query
C02
Missing parameter
C03
Illegal parameter
C04
Checksum error
C05
Setting out of range
7.7.
Command Set Description
7.7.1. General Guide
a) Any command or argument may be in capital letters or small letters.
b) In commands with an argument, a space must be between the command and the
argument.
