Keithley 708B Reference Manual page 436

Models 707B and 708B Switching Matrix Reference Manual
Details
Although the status logical instrument reset affects these attributes, a system reset does not.
This attribute's values are set using a constant or a decimal value, but are returned as a decimal value.
The binary equivalent of the value indicates which register bits are set. In the binary equivalent, the least
significant bit is bit B0, and the most significant bit is bit B15. For example, if a value of 1.02400e+04 (which is
10,240) is read as the value of the condition register, the binary equivalent is 0010 1000 0000 0000. This
value indicates that bit B11 and bit B13 are set.
B15 B14
** >
0 0
* Least significant bit
** Most significant bit
Assigning a value to this attribute enables one or more status events. When an enabled status event occurs, the
corresponding bit is set in the event register. The individual bits of the status byte condition register can be set to
the following described values (for example, to set the enable bit to B9 of the system summary status register
questionable, set status.questionable.enable = status.questionable.S1THR):
Bit Value
B0 to B8 Not used
B9
status.questionable.S1THR
status.questionable.SLOT1_THERMAL
B10
status.questionable.S2THR
status.questionable.SLOT2_THERMAL
B11 status.questionable.S3THR
status.questionable.SLOT3_THERMAL
B12
status.questionable.S4THR
status.questionable.SLOT4_THERMAL
B13 status.questionable.S5THR
status.questionable.SLOT5_THERMAL
B14 status.questionable.S6THR
status.questionable.SLOT6_THERMAL
B15 Not used
In addition to the above constants, quesRegister can be set to the decimal equivalent of the bit to set. To set
more than one bit of the register, set quesRegister to the sum of their decimal weights. For example, to set
bits B11 and B14, set quesRegister to 18,432 (which is the sum of 2048 + 16,384).
Bit
Binary value
Decimal
Weights
Bit
Binary value
Decimal
Weights
Example 1
quesRegister = status.questionable.S1THR +
status.questionable.S3THR
status.questionable.enable = quesRegister
707B-901-01 Rev. A / August 2010
B13 B12 B11 B10
> > > >
1 0 1 0
B7 B6
0/1 0/1
128 64
7
(2 ) (2
B15 B14
0/1 0/1
32,768 16,384
15
(2 ) (2
B9 B8 B7 B6
> > > >
0 0 0 0
Description
Not available
Bit 9 decimal value: 512
Bit 10 decimal value: 1,024
Bit 11 decimal value: 2,048
Bit 12 decimal value: 4,096
Bit 13 decimal value: 8,192
Bit 14 decimal value: 16,384
Not available
B5 B4
0/1 0/1
32 16
6 5 4
) (2 ) (2 )
B13 B12
0/1 0/1
8,192 4,096
14 13 12
) (2 ) (2 )
Section 7: Command reference
B5 B4 B3 B2
> > > >
0 0 0 0
B3 B2 B1
0/1 0/1 0/1
8 4 2
3 2 1
(2 ) (2 ) (2 )
B11 B10 B9
0/1 0/1 0/1
2,048 1024 512
11 10 9
(2 ) (2 ) (2 )
Sets BIT9 and BIT11 of the status
questionable enable register using
constants.
B1 B0
> *
0 0
B0
0/1
1
0
(2 )
B8
0/1
256
8
(2 )
7-183