Remote Control - Commands
NRP2
317User Manual 1173.9140.02 ─ 07
The parallel poll mode is mainly used to quickly find out which of the many devices
connected to the IEC/IEEE bus caused an SRQ. For this purpose, SRE and PPE must
be set to the same value.
6.13.20.4 Queries
Each part of a status register can be read out by queries. The queries are specified in
the description of the SCPI commands (command system STATus). The queries
always yield a number representing the bit pattern of the queried register. This number
is evaluated by the controller program.
Queries are mainly used after an SRQ to obtain detailed information about the cause
of the SRQ.
6.13.20.5
Error Queue Query
Each error in the device causes an entry in the error queue. The entries in the error
queue are error messages in plain text. If a sensor is connected, sensor-specific errors
can be seen via manual control in the menu File(Error List or in remote control via
"Error List...". Usually, the error queue is read with the SCPI 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, 0 = "No error" is returned by the
device.
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.
6.13.21 Initialization of the SCPI Status Registers
The commands *RST, *DCL and SYSTem:PRESet as well as powering on the device
also affect the status reporting system. Initialization of device status, table 6-32, con-
tains the various commands and events causing a reset of the status reporting system.
None of the commands, with the exception of *RST and SYSTem:PRESet, affects the
functional device settings. In particular, DCL does not clear the device settings.
STATus
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