American Magnetics 420 Power Supply Programmer - Manual (Page 110)

92 Rev. 7
Remote Interface Reference
Error Messages
4.6 Error Messages
If an error occurs, the Model 420 will beep, load the internal error buffer
with the error code and description, and set the appropriate bits in the
standard event and status byte registers if enabled by the user. Error
codes are returned with a negative 3 digit integer, then a comma, and then
a description enclosed in double quotes.
Use the SYSTem:ERRor? query to retrieve the errors in first-in-first-out
(FIFO) order. Errors are removed from the internal error buffer as they
are read. The Model 420 can store up to 10 errors.
If more than 10 errors have occurred, the last error stored in the internal
error buffer is replaced with
-304,"Error buffer overflow" . No
additional errors are stored until you have cleared at least one error from
the buffer. If no errors have occurred and the
SYSTem:ERRor? query is
sent to the Model 420, the instrument will return:
0,"No errors"
Error strings may contain up to 80 characters. Errors are classified in the
following categories: command errors, query errors, execution errors, and
device errors. Each category corresponds to the identically named bit in the
standard event register (see page 70). If an error occurs in any one of the
categories, the corresponding bit in the standard event register is set and
remains set until cleared by the user.
4.6.1 Command Errors
-101,"Unrecognized command"
The command string sent was not identified as valid. Check the command
string for invalid characters or separators, syntax errors, or for errors in
the mnemonics. Spaces are not allowed before or after colon separators,
and at least one space must separate a command string from the
parameter(s).
-102,"Invalid argument"
The argument provided as a parameter for the command was invalid.
Value arguments must be of the following form:
‡ an optional plus or minus sign,
‡ a sequence of decimal digits, possibly containing a single decimal
point, and
‡ an optional exponent part, consisting of the letter e or E , an optional
sign, and a sequence of decimal digits.
Enable_value arguments must be within the inclusive range of 0 to 255.