Rohde & Schwarz R&S UPP, User Manual

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Remote Control - Fundamentals
R&S
®
UPP
679 User Manual 1411.1055.32 ─ 10
6.8.12.5 Error Queue Query
Each error in the device causes an entry in the error queue. The entries in the error
queue are detailed error messages in plain text that can be read out on the IEC/IEEE
bus or LAN/USB by the query
SYSTem:ERRor?
. Each
SYSTem:ERRor?
query is
answered by an entry from the error queue. If there are no more error messages in the
error queue, the device responds with 0 = "No error".
The error queue should be queried in the controller program after each SRQ since the
queue entries provide a more precise description of the error cause than the status
registers. In particular, in the test phase of a controller program the error queue should
be queried at regular intervals since it also registers faulty commands from the control-
ler to the device.
6.8.13 Initializing the Status Reporting System
Commands
*RST
,
SYSTem:PRESet
,
DCL
and
SDC
do not affect the status reporting
system. Commands
*RST
and
SYSTem:PRESet
affect the instrument settings.
Table 6-9: Resetting device functions
Event DCL (Device
Clear), SDC
(Selected Devi-
ceClear) *RST or SYS-
Tem:PRESet STATus:PRESet *CLS
Effect
Clear STB, ESR – – – yes
Clear SRE, ESE – – – –
Clear PPE – – – –
Clear EVENt parts
of registers – – – yes
Delete ENABle
parts of the
OPERation and all
QUESTionable
registers – – yes –
Fill PTRansition
parts of all regis-
ters with 1, delete
NTRansition parts – – yes –
Clear error queue – – – yes
Clear output buffer yes 1) 1) 1)
Clear command
processing and
input buffer yes – – –
Effect on the
instrument setting - yes – –
1) = Any command that is the first in a program message clears the output buffer.
Status Reporting System