Keithley 708B Reference Manual page 432

Models 707B and 708B Switching Matrix Reference Manual
Details
Although the status logical instrument reset affects these attributes, a system reset does not.
These 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 bit B0, set status.operation.enable = status.MSB):
Bit Value
B0-B10 Not used
B11
status.PROMPTS
status.PRMPTS
B12
status.USER
B13 Not used.
B14 status.PROGRAM_RUNNING
status.PROG
B15 Not used
In addition to the above constants, operationRegister can be set to the decimal equivalent of the bit to set.
To set more than one bit of the register, set operationRegister to the sum of their decimal weights. For
example, to set bits B11 and B14, set operationRegister to 18,432 (which is the sum of 2048 + 16,384).
a
Bit
Binary value
Decimal
Weights
Bit
Binary value
Decimal
Weights
Example 1
operationRegister = status.PRMPTS + status.PROG
status.operation.enable = operationRegister
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 applicable
Set bit indicates that command prompts are enabled. Bit 11
decimal value: 2,048
Set bit indicates that an enabled bit in the
status.operation.user register is set.
Bit 12 decimal value: 4,096
Not applicable.
Set bit indicates that a program is running.
Bit 14 decimal value: 16,384
Not applicable
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 the PRMPTS and PROG bits of the
operation status enable register register
using constants.
B1 B0
> *
0 0
B0
0/1
1
0
(2 )
B8
0/1
256
8
(2 )
7-179