Cooper Instruments & Systems DFI 1650 Multi-Channel Digital Force Indicator - Manual (Page 28)

CF 126 25 Nov 2001
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 AID converter’s full scale
Usage “#aacc FF ↵”
# 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 “#aacc FH n ↵”
# 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 “#aacc R5 ↵” to read, “aacc W5 n ↵” 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 recalibrated to the transducer.
R6/W6 Read/write Units Label
Purpose Reads or writes the channel's "DISPLAY. UNITS" menu item
Usage “#aacc R6 ↵” to read, “#aacc W6 n ↵” 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 four-character units label.
↵ is the 'carriage return' character (ASCII decimal 13 ).
Example “#0001W6CATS ↵”
Reply When writing: "OK" or "ERROR".
When reading: a four-character string.
Changing this value doesn't change the mathematically scaling of the channel's values;
that can be changed by altering the "CALIBRATION DATA -> FULL -SCALE VALUE"
menu item and performing a recalibration.