LAMBDA DG-4 PLUS & DG-5 PLUS OPERATION MANUAL – REV. 3.05B (20131009)
40
Command
Value
(Decimal;
hexadecimal;
binary)
Description
Start Loading Ring
Buffer
223
DF
11011111
Places the controller in a mode that allows a series of filter
values to be loaded in the ring buffer
Start Change of Neutral
Density Setting
234
EA
11101010
Places the controller in the N.D. adjust mode. In this mode,
the output galvo position for the selected filter value can be
changed as a fine adjustment for output intensity.
Increase Value of Galvo
DAC for Neutral
Density
235
EB
11101011
Increases the galvo DAC value by 1 unit
Decrease Value of Galvo
DAC for Neutral
Density
236
EC
11101100
Decreases the galvo DAC value by 1 unit
End Change of Neutral
Density Setting and
Save
237
ED
11101101
Saves the new galvo DAC value and returns to the normal
on-line mode
Go On Line (Transfer
Control to Computer)
238
EE
11101110
When the control unit is in the local mode, the unit will be
forced to go on-line if this code is sent. The input from which
this command is received will be the active input and will be
identified on the front-panel display. Sending this command
via one input when the other input is active will cause the
unit to select the input from which the command was
received.
If 238 is the current command of the either input,
do not send 238 by the other channel and do not attempt to
go to the local mode! In either case, the controller will loop
between modes continuously.
End Loading Ring
Buffer
240
F0
11110000
Sent after the final value to be loaded in the ring buffer. This
saves the new ring buffer values and returns to the normal
on-line mode.
Run from Ring Buffer
241
F1
11110001
When this command has been sent, the filter value will be
controlled by the ring buffer. The controller will step
through the ring buffer, advancing to the next filter for each
trigger or sync pulse. One of the three modes of triggering
must be selected first.
End Run from Ring
Buffer
242
F2
11110010
Returns to normal on-line mode
4.1.4
Busy Line
The Lambda DG-4 parallel interface has only one output line, BUSY. The first response of
the unit to a new command is to set the BUSY output line HIGH. The BUSY line will stay
HIGH until the control unit is ready to accept new data..
The status of the 8 input lines is not checked while the BUSY line is HIGH! There is a short
period (as much as 50 microseconds) between when the control unit detects a new value and