Cooper-instruments-systems DFI 1650 Multi-Channel Digital Force Indicator Manuel d'utilisateur télécharger pdf (Page 35)

CF 126 32 Nov 2001

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.

R6/W6 Read/Write Units Label

Purpose Reads or writes the channel's "DISPLAY. UNITS" menu item

Usage

"#aaccR6↵” to read, "#aaccW6n↵" 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 re-calibration.

R7/W7 Read/Write Full-Scale VRMS

Purpose Reads or writes the channel's "FULL-SCALE VRMS" menu item.

Usage

"#aaccR7↵" to read, "#aaccW7n↵" 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 output of the LVDT at 3VAC excitation in units of VRMS.

n is the argument defined below.

↵ is the 'carriage return' character (ASCII decimal 13).

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Cooper-instruments-systems DFI 1650 Multi-Channel Digital Force Indicator Manuel d'utilisateur Page 35

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