Reading Registers - Keithley 708B Reference Manual

Appendix C: Status model
16-bit status register
Figure 104: 16-bit status register
Bit Position
Binary Value
Decimal
Weights
A. Bits 0 through 7
Bit Position
Binary Value
Decimal
Weights
B. Bits 8 through 15
When using a numeric parameter, registers are programmed by including the appropriate <mask>
value, for example:
*ese 1169
status.standard.enable = 1169
To convert from decimal to binary, use the information shown in the above figure. For example, to set
bits B0, B4, B7, and B10, a decimal value of 1169 would be used for the mask parameter (1169 = 1 +
16 + 128 + 1024).

Reading registers

Any register in the status structure can be read either by sending the common command query
(where applicable), or by including the script command for that register in either the print() or
print(tostring()) command. The print() command returns a numeric value, while the
print(tostring()) command returns the string equivalent. For example, any of the following
commands requests the Service Request Enable register value:
*SRE?
print(tostring(status.request_enable))
print(status.request_enable)
The response message will be a decimal value that indicates which bits in the register are set. That
value can be converted to its binary equivalent using the information in
transition registers
Bits B5, B2, and B0 are set.
C-14
B7 B6 B5 B4
0/1 0/1 0/1 0/1
128 64 32 16
7 6 5
(2 ) (2 ) (2 ) (2
B15 B14 B13 B12
0/1 0/1 0/1 0/1
32768 16384
8192 4096 2048 1024
15 14 13 12
(2 ) (2 ) (2 ) (2
(on page C-13). For example, for a decimal value of 37 (binary value of 100101),
Models 707B and 708B Switching Matrix Reference Manual
B3 B2 B1
0/1 0/1 0/1
8 4 2
2
4 3 1
(2 )
) (2 ) (2 )
B11 B10 B9
0/1 0/1 0/1
512
11 10 9
) (2 ) (2 ) (2 )
B0
0/1
1
0
(2 )
B8
0/1
256
8
(2 )
Programming enable and
707B-901-01 Rev. A / August 2010