Agilent Technologies 8935 Series Manual do Utilizador descarregar pdf (Página 146)

146 Chapter 6

O:\Manuals\E6380A_Progguid\Book\Advoper.fm

Advanced Operations

Status Reporting

Accessing the Error Message Queue

A message appears in the Error Message Queue any time bit 2, 3, 4, or

5 of the Standard Event Status register is asserted. Each message

consists of a signed error number, followed by a comma separator,

followed by an error description string in double quotes. The maximum

length of the error description string is 255 characters. If more than 20

messages are in the queue and another error occurs, the last message is

replaced with the message, -350,"Queue overflow". If no messages

are in the queue the message, +0,"No error" is returned. Reading a

message removes it from the queue. The Error Message Queue is

accessed using the SYSTem command. Returned information is read

into a numeric variable followed by a string variable.

Reading the Error Message Queue

Example 6-41 Syntax

SYSTem:ERRor?

Example 6-42 Example

OUTPUT 714;"SYST:ERR?"

ENTER 714;Error_num,Error_msg$

Example 6-43 Example IBASIC program

10 INTEGER Error_num

20 DIM Error_msg$ [255]

30 OUTPUT 714;"SYST:ERR?"

40 ENTER 714;Error_num,Error_msg$

50 PRINT Error_num;Error_msg$

60 END

Example 6-44 Example response

-113 "Undefined header"

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 328 329

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Agilent Technologies 8935 Series Manual do Utilizador Página 146