Rohde & Schwarz R&S FSL3 - IST Flag and Parallel Poll Enable Register (PPE); Event Status Register (ESR) and Event Status Enable Register (ESE)

Status Reporting System R&S FSL
1300.2519.12 5.18 E-11
IST Flag and Parallel Poll Enable Register (PPE)
By analogy with the SRQ, the IST flag combines the entire status information in a single bit. It can be
read by means of a parallel poll (refer to section "Parallel Poll") or using the command *IST?.
The parallel poll enable register (PPE) determines which bits of the STB contribute to the IST flag. The
bits of the STB are ANDed with the corresponding bits of the PPE, with bit 6 being used as well in
contrast to the SRE. The IST flag results from the ORing of all results. The PPE can be set using
commands *PRE and read using command *PRE?.
Event Status Register (ESR) and Event Status Enable
Register (ESE)
The ESR is defined in IEEE 488.2. It can be compared with the EVENt part of a SCPI register. The
event status register can be read out using command *ESR?.
The ESE is the associated ENABle part. It can be set using the command *ESE and read using the
command *ESE?.
Table 5–4 Meaning of the bits in the event status register
Bit No. Meaning
0
Operation Complete
This bit is set on receipt of the command *OPC exactly when all previous commands have
been executed.
1
Not used
2
Query Error
This bit is set if either the controller wants to read data from the instrument without having
sent a query, or if it does not fetch requested data and sends new instructions to the
instrument instead. The cause is often a query which is faulty and hence cannot be
executed.
3
Device–dependent Error
This bit is set if a device–dependent error occurs. An error message with a number
between –300 and –399 or a positive error number, which denotes the error in greater
detail, is entered into the error queue.
4
Execution Error
This bit is set if a received command is syntactically correct but cannot be performed for
other reasons. An error message with a number between –200 and –300, which denotes
the error in greater detail, is entered into the error queue.
5
Command Error
This bit is set if a command is received, which is undefined or syntactically incorrect. An
error message with a number between –100 and –200, which denotes the error in greater
detail, is entered into the error queue.
6
User Request
This bit is set on pressing the Local softkey.
7
Power On (supply voltage on)
This bit is set on switching on the instrument.