R&S NRP Series, User Manual

Page: 134 / 161

Remote control basics
R&S
®
NRPxxA(N)
134 User Manual 1177.6017.02 ─ 08
The highest level is formed by the status byte register (STB) and the associated ser-
vice request enable (SRE) register.
The status byte register (STB) receives its information from:
●
Standard event status register (ESR)
●
Associated standard event status enable register (ESE)
●
SCPI-defined operation status register
●
Questionable status register, which contains detailed information on the device.
Table 11-3: Used status byte bits and their meaning
Bit
no. Short description Bit is set if
1 Device status register summary A sensor is connected or disconnected or when an error has
occurred in a sensor, depending on the configuration of the
sensor status register.
Chapter 11.2.2, "Device status register" , on page 135.
2 Error queue not empty The error queue has an entry. If this bit is enabled by the ser-
vice request enable register, each entry of the error queue
generates a service request. An error can thus be recognized
and specified in detail by querying the error queue. The query
yields a conclusive error message. This procedure is recom-
mended since it considerably reduces the problems of IEC/
IEEE-bus control.
3 Questionable status register
summary An
EVENt
bit is set in the
QUEStionable
status register and
the associated
ENABLe
bit is set to 1. A set bit denotes a ques-
tionable device status which can be specified in greater detail
by querying the questionable status register.
Chapter 11.2.3, "Questionable status register" , on page 136.
4 MAV
Message available
A readable message is in the message queue. This bit can be
used to automate reading of data from the sensor into the con-
troller.
5 ESB
Standard event status register
summary
One of the bits in the standard event status register is set and
enabled in the event status enable register. Setting this bit
denotes a serious error which can be specified in greater detail
by querying the standard event status register.
Chapter 11.2.4, "Standard event status and enable register
(ESR, ESE)"
, on page 139.
6 RQS/MSS
Master status summary
The sensor triggers a service request, which happens if one of
the other bits of this register is set together with its enable bit
in the service request enable register (SRE).
7 Operation status register sum-
mary An
EVENt
bit is set in the operation status register and the
associated
ENABLe
bit is set to 1. A set bit denotes that an
action is being performed by the sensor. Information on the
type of action can be obtained by querying the operation sta-
tus register.
Chapter 11.2.5, "Operation status register" , on page 140.
Further information:
●
See Figure 11-1 .
●
Set and read the service request enable register using
*SRE
.
Status reporting system