CF 126
38
Nov 2001
Remarks
This command is not available on the DFI 1550.
FB
Clear Peak and Valley Data
Purpose
To reset the channel's peak and valley data values to the track value.
Usage
"#aaccFB
↵
"
# is the 'pound' or 'hash' character (ASCII decimal 35).
aa is the two-character instrument address.
cc is the two-character channel number
↵
is the 'carriage return' character (ASCII decimal 13).
Example
"#0001FB
↵
"
Reply
"OK" or "N/A"
Remarks
This command is not available on the DFI 1550.
FF
Transmit Analog-to-Digital Converter Reading
Purpose
To transmit the Analog-to-Digital converter reading as a percentage from -100% to
+100% of the A/D converter’s full scale.
Usage
“#aaccFF
↵
"
# is the 'pound' or 'hash' character (ASCII decimal 35).
aa is the two-character instrument address.
cc is the two-character channel number
↵
is the 'carriage return' character (ASCII decimal 13 ).
Example
“#0001FF
↵
”
Reply
" 872945" (typical)
Remarks None
FH
Write DAC Control Value
Purpose
To control the channel's Digital-to-Analog Converter (DAC) manually or automatically
Usage
“#aaccFHn
↵
"
# is the 'pound' or 'hash' character (ASCII decimal 35).
aa is the two-character instrument address.
cc is the two-character channel number.
n is the argument defined below.
↵
is the 'carriage return' character (ASCII decimal 13).
Argument
"AUTO" returns the DAC to its normal automatic operation (power-on default). That is, it
is controlled by the "DAC. CHANNEL", "DAC. SOURCE", "DAC. ZERO-SCALE" and
"DAC. FULL-SCALE" menu items.
If the argument is a numeric value between -1 and +1, the DAC is forced to manual
control and the value is used to drive the DAC from -100% to + 100% of its output.
Example
"#0001FH. 5
↵
" will force channel 01 's DAC to +50% of full-scale.
Reply
OK" or "ERROR
Remarks
You might wish to force a channel's DAC to a certain output to help calibrate the attached
data acquisition system or other device.
R5/W5
Read/write Full-Scale Value
Purpose
Reads or writes the channel's "FULL SCALE VALUE" menu item
Usage
"#aaccR5
↵
" to read, "#aaccW5n
↵
" to write.
# is the 'pound' or 'hash' character (ASCII decimal 35).
aa is the two-character instrument address.
cc is the two-character channel number
n is the full-scale value in engineering units.
↵
is the 'carriage return' character (ASCII decimal 13).
Example
"#0001W520000
↵
”
Reply
When writing: "OK" or "ERROR".
When reading: an ASCll-floating-point value.
Changing this value has no effect until the channel is re-calibrated to the transducer.
