Quantum Composers LDDC 1550 - Manual (Page 22)

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or 14, no other power supply is needed. If no auxiliary power can be provided, an
external +15VDC (200mA) supply may be used.
3. Turn on the LDDC/LSC, press any key, and take note of the LDDC/LSC main screen
which states what the maximum current output is set to. Ensure that this maximum
current value does not exceed that of the Diode Driver or the laser diode. If this value
needs to be changed, take note of what this value needs to be changed to and reference
the following remote commands which will address this.
4. Now ensure that the computer recognizes the unit as a "LDDC Controller." Open a
terminal program such as Hyperterminal and select the appropriate COM port that the
LDDC/LSC now resides on. The communication settings are as follows: Baud Rate =
Any, Data Bits = 8, Parity = None, Stop Bits = 1.
5. Each driver can have a specific compliance voltage that is part of the model number. The
measured compliance voltage on the main page is based off this value. If your supply
provides a direct one to one output of the compliance voltage, then the compliance
voltage calibration can be reduced to zero or set to a value of 10. When set to zero, you
will see a "Direct" indication on the display. Again, if this value needs to be changed,
take note of what this value needs to be changed to and reference the following remote
commands which will address this.
6. Send the following sequence of commands using the terminal program by referencing the
following example:
Example 1
Continuous Wave, Interlock Control Enabled, Maximum Current = 10 Amps,
Compliance Voltage = 2 Volts, Current Setting = 5 Amps
;DC:MC 10<cr> Sets the Maximum Current to 10 Amps
;DC:CV 2<cr> Sets the Compliance Voltage to 2 Volts
;DC:PM 0<cr> Sets the Pulse Mode to Continuous Wave
;DC:IC 1<cr> Sets the Interlock Control to "Closed"
;DC:CS 5<cr> Sets the Current Setting to 5 Amps
;DC:EN 1<cr> Sets the Enable signal to "Enabled"
;DC:ST 1<cr> Sets the Start signal to "Active" (begins firing)
;DC:SS?<cr> Query the system status for information