Agilent Technologies E3634A The Status Byte Register, The Standard Event register is cleared when

Chapter 4 Remote Interface Reference

The SCPI Status Registers

The Standard Event register is cleared when:

•You execute the *CLS (clear status) command.

•You query the event register using the *ESR? (Event Status register) command.

For example, 28 (4 + 8 + 16) is returned when you have queried the status of the Standard Event register, QYE, DDE, and EXE conditions have occurred.

The Standard Event Enable register is cleared when:

•You execute the *ESE 0 command.

•You turn on the power and have previously configured the power supply using the *PSC 1 command.

•The enable register will not be cleared at power-on if you have previously configured the power supply using the *PSC 0 command.

The Status Byte Register

The Status Byte summary register reports conditions from the other status registers. Query data that is waiting in the power supply’s output buffer is immediately reported through the “Message Available” bit (bit 4) of Status Byte register. Bits in the summary register are not latched. Clearing an event register will clear the corresponding bits in the Status Byte summary register. Reading all messages in the output buffer, including any pending queries, will clear the message available bit.

Table 4-5. Bit Definitions – Status Byte Summary Register

	Bit		Decimal	Definition
			Value
0-2		Not Used	0	Always set to 0.
3		QUES	8	One or more bits are set in the questionable status
				register (bits must be “enabled” in the enable register).
4		MAV	16	Data is available in the power supply output buffer.
5		ESB	32	One or more bits are set in the standard event register
				(bits must be “enabled” in the enable register).
6		RQS	64	The power supply is requesting service (serial poll).
7		Not Used	0	Always set to 0.

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