Error Codes and Messages
117
D
Error Codes and Messages
Introduction
This appendix describes the GP-IB error codes that can be readback to the controller and the error messages that can be
displayed on the power supply’s front panel. A brief explanation of each code and message is also given. The error codes
and/or messages fall into three categories: Power-on Self Test Messages, responses to the ERR? query, and responses to the
TEST? query.
Power-On Self Test Messages
The applicable message listed in Table D-1 is displayed on the supply’s front panel if the corresponding function has failed
the power-on self test. No error code numbers can be returned for these errors. If any of these error messages appear, refer
to the Troubleshooting section in the Service Manual.
Error Responses
Table D-2 describes the error codes and messages that can be generated for various programming, calibration, and hardware
errors. The error codes can be read back over the GP-IB in response to the ERR? query. The applicable error message is
displayed on the supply’s front panel when the ERR key is pressed. Sending the ERR? or pressing the ERR key clears the
error.
Test Responses
Table D-3 describes the codes that can be read back over the GP-IB in response to the TEST? query. The TEST? query
initiates a self test of the supply.
Table D-1. Power-On Self Test Error Messages
Message Explanation
TIMER FAILED The timer on the GP-IB board failed.
8291 FAILED GP-IB control chip on the GP-IB board failed.
CV DAC CH < ch > The voltage DAC on the specified output board failed.
CC DAC CH < ch > The current DAC on the specified output board failed.
OV DAC CH < ch > The overvoltage DAC on the specified output board failed.
FUSE CH < ch > The return fuse on the specified output board is opened.
HDW ERR CH < ch > The specified output board is down (no output).
Table D-2. ERROR Responses
Error Code
(ERR? query)
Message
(ERR key)
Explanation
0 NO ERROR Indicates there are no errors.
1 INVALID CHAR You sent the supply a character it did not recognize.
2 INVALID NUM The format of your number is incorrect. Check syntax (see Chapter 5).
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