functional.
SYSTem:REMote
Place the multimeter in the
remote
mode. All buttons on the front panel,
except the LOCAL button, are disabled.
C.9 The SCPI Status Pattern
Status registers are provided in the same way by all SCPI equipment.
And there are three register groups with various equipment conditions
recorded by the status system. They are
the Status Byte Register
,
the
Standard Event Register
and
the Questionable Data Register
.
The
Status Byte Register
collects and records high-level summary
information which is reported in other register groups. With the
following diagram illustration, you would make themselves clear for the
SCPI status system. In addition,
the Standard Event
and
the
Questionable Data Registers
have event registers which belong to
read-only registers and report defined conditions in a multimeter. Bits
are latched in the event registers. As long as an event bit is set,
subsequent state changes will be ignored. Besides, bits in an event
register are cleared automatically by the commands, for example:
*ESR?, STAT:QUES:EVEN? or *CLS. Please note that the reset
command (*RST) or device clear in event registers won’t clear bits. To
query an event register will return a decimal value corresponding to
binary-weighted sum of all bits set in the register.
An enable register is readable and writable, and can define which bits
in the corresponding event register are ORed together to generate a
single summary bit. To query an enable register won’t clear it, as well
the command *CLS, but it can clear the bits in the event registers. And
the command STATus:PRESet will clear the questionable data enable
register. Moreover, to enable bits in an enable register, you have to
write a decimal value corresponding to the binary-weighted sum of the
bits in the register by your demands.
171
Binary Weights
2
º
= 1
2
¹
= 2
2
²
= 4
2
³
= 8
2
4
= 16
2
5
= 32
2
6
= 64
2
7
= 128
2
8
= 256
2
9
= 512
2
10
= 1024
2
11
= 2048
2
12
= 4096
2
13
= 8192
2
14
= 16384
2
15
= 32768
