Associated Research HYPOTULTRA III 7620, Operation And Service Manual, Page: 97 / 148

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*SRE?
Queries the Service Request enable register. Returns the decimal value of binary-weighted sum
of bits.
8.9.7. Status Reporting
Status reporting system is configured using two types of registers. An Event Register and a
Summary register. The summary register is known as the Status Byte register and records high-
level summary information acquired by the event registers.
An Event register report defined conditions or messages at each bit. The bits are latched and
remain at an active state until the register is either Read or Cleared. Reading the event register
automatically clears the register and sets all bits to inactive state or 0. When querying an event
register the information is returned as a decimal number representing the binary-weighted sum
of all bits within the register.
The Enable registers bits represent the selection of bits that will be logically-ORed together to
form the summary bit in the status byte. The *CLS command will not clear the enable registers
and if you wish to clear the register you must set it to a value of 0. Like the event register, the
enable register is represented as a decimal number that equals the binary-weighted sum of all
bits.
The enable register will clear to value of 0 at power up unless the *PSC 0 command had been
executed before power-off. The *PSC command tells the device whether or not it should clear
the enable registers at power-on. Using this command will allow SQRs to function immediately
after power-on.
Standard Event Register Status Byte Register
Bit Binary
weight
Event Register Enable
Register Summary Register Enable
Register
0 1 Operation Complete ALL PASS
1 2 not used FAIL
2 4 Query Error ABORT
3 8 Device Error TEST IN PROCESS
4 16 Execution Error Message Available (MAV)
5 32 Command Error Event Summary Bit (ESB)
6 64 not used Request Service (RQS) or
Master Summary Status (MSS)
not used
7 128 Power On PROMPT
*ESR? *ESE *STB? | SPOLL *SRE
*ESE? *SRE?