Technical data

7.3.3 Description of Errors
When errors occur in the remote-controlled settings and measurements, they are saved with a
code in the error register. The contents (error message) of the error register can be called and
deleted at any time by transmission of the command ERR?.
If several errors arise only the first two error codes are saved. On repeating transmission of
the command ERR? the contents of the error codes are saved in the output buffer and
initialized (deleted). The initializing of the error register is also started by transmission of the
command *CLS (initializing of the state register).
Note
: Inappropriate transmission of the ERR? command may cause errors. For this reason
the interface command DCL should be transmitted before the ERR? command is
transmitted.
7.3.3.1 DER - DEVICE ERROR REGISTER
The contents of the DER register are saved in the output buffer by transmission of the
command DER?.
Contents of the DER register: DER xxx
Bit 7: is set on 1 when the unit is overheated.
6: is set on 1 during reading of the selection register.
5: (BCC) is set on 1 when the current limit of source B is exceeded.
4: (BCV) is set on 1 when the voltage limit of source B is exceeded.
3: is not used, is always set on Ø.
2: is not used, is always set on Ø.
1: (ACC) is set on 1 when the current limit of source A is exceeded.
Ø: (ACV) is set on 1 when the voltage limit of source A is exceeded.
7.3.3.2 Error Messages
The error messages are dependent on the operating state and the type of the error.
On local control interface errors are displayed for only a short time. On remote control
interface errors are displayed until the contents of the error register are queried or initialized.
Unit errors are displayed until new commands from the PC are transmitted.
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Operating Instructions PN 300
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