IEEE-488 Common Commands
Bit
Number
Bit Name Decimal
Value
Definition
4 Execution
Error
16 An execution error occurred. Error Messages
5 Command 32 A command syntax error occurred. Error Messages
6 (not used) 64 (Reserved for future use)
7 Power On 128 Power has been cycled since the last time the event register was read or
cleared.
Status Byte Register
The following table describes the Status Byte Register.
Bit
Number
Bit Name Decimal
Value
Definition
0 (not used) 1 (Reserved for future use)
1 (not used) 2 (Reserved for future use)
2 Error Queue 4 One or more errors in the Error Queue. Use SYSTem:ERRor? to read and
delete errors.
3 Questionable
Data Summary
8 One or more bits are set in the Questionable Data Register (bits must be
enabled, see STATus:QUEStionable:ENABle ).
4 Message Avail-
able
16 Data is available in the instrument's output buffer.
5 Standard
Event Sum-
mary
32 One or more bits are set in the Standard Event Register (bits must be ena-
bled, see *ESE).
6 Master Sum-
mary
64 One or more bits are set in the Status Byte Register and may generate a
Request for Service (RQS). Bits must be enabled using *SRE.
7 Operation Reg-
ister
128 One or more bits are set in the Operation Status Register. Bits are ena-
bled using STATus:OPERation:ENABle.
*CLS
Clear Status Command. Clears the event registers in all register groups. Also clears the error queue.
Parameter Typical Return
(none) (none)
Clear event register bits and error queue:
*CLS
230 Agilent 33500 Series Operating and Service Guide
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