HP 6627A - Manual (Page 109)

Error Codes and Messages 109
D
Error Codes and Messages
Introduction
This appendix describes the HP-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 HP-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 HP-IB in response to the TEST? query. The TEST? query
initiates a self test of the supply.
Table D-l. Power-On Self Test Error Message
Message Explanation
TIMER FAILED The timer on the HP-IB board failed.
8291 FAILED HP-IB control chip on the HP-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).