*STB
Description
This command reads the content of the status register. Registers are cleared only when the signals feeding it are cleared. For more information about the status registering refer to Registers.
| Syntax | Response |
|---|---|
*STB? |
<numeric> |
| Response value | description |
|---|---|
<numeric> |
value of the register in range from 0 to 255 |
| Bit value | code | description |
|---|---|---|
| Bit 0 - 1 | Available to designer |
not used |
| Bit 1 - 2 | Available to designer |
not used |
| Bit 2 - 4 | Error/Event Queue |
indicates that the error event queue is NOT empty |
| Bit 3 - 8 | Questionable Status Summary |
indicates that some devices values are questionable and therefore the quality of the measurement is not guaranteed |
| Bit 4 - 16 | Message Available |
indicates that a message is available in the output queue |
| Bit 5 - 32 | Event Status Register Summary |
indicates that an event or an error occurred |
| Bit 6 - 64 | User Request |
Not used for the actual measurement device, because RAW socket does not support service requests. |
| Bit 7 - 128 | Operation Status Summary |
indicates that the device is currently performing some operations |
Sample usage
Input:
var visaSession = new TcpipSocket(VISA_RESOURCENAME); visaSession.RawIO.Write("*STB?\n"); Console.WriteLine(visaSession.RawIO.ReadString());
Output:
0 (nothing happened and the error event queue is empty)