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13-8
DISPlay, FORMat, and SYSTem Key-Press Codes
Reading number (RNUM) – The reading counter starts at zero when Delta, Pulse
Delta, or Differential Conductance is started. If the delta test is set for an infinite
count, the reading number will continue counting up to number 2,147,483,643. If
the delta test is still running after that count, the reading counter will reset to zero.
Source (SOUR) – This element is the programmed output current (in amps) of the
Model 622x.
Compliance (COMP) – The compliance element reports the compliance state of
the current source. If in compliance, a "T" is returned. If not in compliance, an "F"
is returned. For the double precision data formats (DREal and REAL, 64), the
compliance state is returned as a "1" (in compliance) or a "0" (not in compliance).
The compliance state is polled for every reading and will slow down the reading
rate. The COMP element must be selected before the delta test is started. If the
COMP element is selected while reading acquisition is in process, the "F" (not in
compliance) state will always be returned for each reading string.
Average voltage (AVOL) – A Differential Conductance reading can also be
returned as an average voltage reading. See
voltage is calculated.
If the readings being returned are not Differential Conductance readings, nothing
is returned in this element position if AVOL is selected as a data element.
FORMat:BORDer <name>
Parameters
For normal byte order, the data format for each element is sent as follows:
Byte 1
Byte 1
For reverse byte order, data is sent as follows:
Byte 4
Byte 8
The "#0" header
always sent at the beginning of the data string for each measurement conversion.
The ASCII data format can only be sent in the normal byte order. The SWAPped
selection is ignored when the ASCII format is selected.
The SWAPped byte order must be used when transmitting binary data to any
IBM PC.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
NORMAL
= Normal byte order for IEEE-754 binary format
SWAPped = Reverse byte order for IEEE-754 binary format
Byte 2
Byte 3
Byte 2
...
Byte 3
Byte 2
Byte 7
...
(Figure
13-2) is not affected by this command. The header is
Return to
Section 13 topics
Model 6220/6221 Reference Manual
Section 5
for details on how average
Byte 4
(Single precision)
Byte 8
(Double precision)
Byte 1
(Single precision)
Byte 1
(Double precision)
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