Structure Of Scpi Status Register - Rohde & Schwarz R&S UPP User Manual

®
R&S UPP
Tus:QUEStionable:MEASuring, which contain more detailed information about the
instrument.
The status reporting system also includes the IST (Individual STatus) flag and the Par-
allel Poll Enable (PPE) register assigned to it. The IST flag, like the SRQ, combines the
complete device status in a single bit. The PPE has the same function for the IST flag
as the SRE has for the service request.
The output buffer contains messages that the device sends back to the controller. It is
not part of the status reporting system but determines the value of the MAV bit in the
STB.

6.8.1 Structure of SCPI Status Register

Each SCPI register consists of five 16 bit parts with different functions (see figure
below). The individual bits are independent of each other, i.e. each hardware status is
assigned a bit number that is the same for all five parts. For instance, bit 5 of the STA-
Tus:OPERation register is assigned to the Wait for Trigger hardware status in all five
parts.
Figure 6-3: General structure of the status registers
Queries return the current value of the particular part register to allow a check of the
device status. A decimal value between 0 and 32767 (= 2^15 − 1), or between 0 and
65535 (= 2^16 − 1), is returned.
The configuration commands set the respective part register, thus determining which
status changes of the R&S UPP cause a change in the status registers. A decimal
value between 0 and 32767 (= 2^15 − 1), or between 0 and 65535 (= 2^16 − 1), is set.
●
CONDition
The CONDition part is written directly by the hardware or the summary bit of the
subordinate register. Its contents indicate current device status. This register part
can only be read, not written or cleared. Reading the register does not change its
contents.
●
PTRansition
These two transition register parts enable you to define the status change of the
CONDition part (none, 0 to 1, 1 to 0 or both) that is to be held in the EVENt part.
User Manual 1411.1055.32 ─ 10
Remote Control - Fundamentals
Status Reporting System
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