Ceyear 1465 Series, Programming Manual

Page: 32 / 143

2 Remote Control
2.1 Remote control basis
25
The STB and ESR registers include 8 bits, and the SCPI register includes 16 bits. The returned value of
the queried status register is in decimal format. The decimal value is equal to the sum of the data bits
and their own weights after operation.
The relationship between the data bit and its weight is as shown in the following Figure:
Weight
128 64 32 16 8 4 2 1
Data Bit 0 1 2 3 4 5 6 7
Fig. 2.5 Relationship between Data Bits and their Weights
5) Error queue
Each error status of the instrument corresponds to an entry in the error queue, and the entry contains the
specific error message text which can be viewed through the error log or queried via the programmable
command ―SYSTem:ERRor[:NEXT]?‖. If there is no error in the error queue, the query will return 0, ―No
Error‖.
As the obtained error cause description is more accurate than the status register, the error queue shall
be queried in the controller service request handler. The error queue shall be frequently queried
especially during the controller program test stage, so as to clarify the error command record sent to the
instrument by the controller.
2.1.5.5 Reset status reporting system
The following list shows the commands and events for resetting the status report system. Except for the
commands *RST and SYSTem:PRESet, other commands do not change the instrument function settings.
Similarly, the DCL will not change setting status of the instrument. The specific description is as shown in
the following table:
Table 2.11 Resetting Status Report System
Event Power On/Off
(Power-on status
cleared)
DCL, SDC
(Instrument
cleared,
selected
instrument
cleared) *RST or
SYSTem:
PRESet STATus:
PRESet *CLS
0 1
Clear
STB and ESR
—
Yes
— — —
Yes
Clearing SRE,
ESE
—
Yes
— — — —
Clearing PPE
—
Yes
— — — —
Clearing the
event part of
the register
—
Yes
— — —
Yes
Function