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ADS-14221, PPT2 User Manual
COMMAND CODE
AN
Action
Sequential
Directing
Response
with (90-99)
address
Yes
Before
DETAILS:
The AN command turns on and off the custom ANalog output setting of the DAC. The analog range setting is
established with the H= and L= commands. Analog window settings are established with the O= and W=
commands. When AN is ON, the customized settings are activated; when OFF, the factory default range of 0V to
5V is active. When custom H= and L= range settings are used, the resolution of the analog signal will be
reduced. For example, the full 5 volt range has a 15+ bit resolution. A range reduction to 2.5 volts will result in a
7+ bit resolution. Ranges between these two values would result in a resolution between 7+ and 15+ bits. The
use of analog window limits O= and W= can increase the volts/pressure resolution of the analog signal.
(Default: AN=ON)
NOTE:
Regardless of AN setting, DX and DZ settings are always active. AN command settings affect the analog output
only when DA=A|B|C|D|E|F|G|M|M|R. When DA=V the analog output is disabled (floating).
EXAMPLES:
Inquiry: *ddAN
Action:
*ddWE
*ddAN={ON|OFF|ON-|OFF-}
ON
OFF
ON-
OFF-
DIFFERENCES FROM LEGACY PPT:
No difference from PPT implementation.
Analog Range Setting
Input or
Requires
Output Type
Write Enable
Both
Yes (6)
The analog output will adjust to the high and low limits (H=, L=) and the offset and
window limits (O=, W=). The highest pressure produces the high (H=) output voltage
and the lowest pressure produces the low (L=) voltage.
The analog output will set to 5 volts for the FS pressure (F=) and to 0 volts for zero
pressure - or negative FS pressure for differential.
Same function as ON, but output scale is reversed. i.e. The highest pressure produces
the low (L=) output voltage and the lowest pressure produces the high (H=) voltage.
The analog output will set to 0 volts for the FS pressure (F=) and to 5 volts for zero
pressure - or negative FS pressure for differential.
COMMAND DESCRIPTION
Terminates
Can Write to
Continuous
EEPROM
Commands
No
Yes (9)
EEPROM Store: *ddWE
October, 2016
Can Write to DAC
Yes
*ddSP=ALL
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