Goudsmit HGM09S, Руководство по эксплуатации, Страница: 48 / 75

Gaussmeter HGM09s Operating Instructions
Chapter 7 Serial Interface
Page 48 / 75
7.4.6 7.4.6 7.4.6 7.4.6 The SCPI Status Model The SCPI Status Model The SCPI Status Model The SCPI Status Model
The status system records different device conditions in several register groups. The
individual messages are grouped in the several registers. One bit of these registers is
related to one message respectively.
The measuring event register stores the messages that are relevant for the measure-
ment. The data error register stores the error messages and the standard event regis-
ter the SCPI standard messages
.
7.4.6.1
7.4.6.1 7.4.6.1
7.4.6.1 Event Register
Event Register Event Register
Event Register
The event register can only be read. The signal bits are set by the device but are not
deleted automatically.
Bits in an event register are deleted either by interrogation of this register (*ESR? or
e.g. :STAT:QUES:EVEN?) or by the *CLS command. When interrogating an event
register, the device emits a decimal value that corresponds to the sum of the binary
place values of all bits that are set in this register.
7.4.6.2 7.4.6.2 7.4.6.2 7.4.6.2 Release Register Release Register Release Register Release Register
The individual bits of the assigned event registers are masked via the release regis-
ters. Only the released bits enter into the sum bit as an OR connection. The release
registers are read- and writeable. The release registers are not deleted by a query.
The *CLR command does not delete the release registers. The command
:STATus:PRESet deletes the release register for the error data. When interrogating an
event register, the device emits a decimal value that corresponds to the sum of the
binary place values of all bits that are set in this register. For setting the bits in a re-
lease register, a decimal value is transmitted that corresponds to the sum of the bi-
nary place values of all bits set in this register.
7.4.6.3
7.4.6.3 7.4.6.3
7.4.6.3 Sum Register
Sum Register Sum Register
Sum Register
In the sum register the results of the event registers are summarized after the mask-
ing in the release register and assigned to individual bits. The deletion of the event in
the event registers also sets back the respective sum bit in the status register. Via the
release register of the sum register the individual sum bits can be re-merged to one
whole message service request.