Chapter II – System Operation
2-15
C
996-0255 rev. b
Warning:
Laser output should occur at next step.
7. On the Powerlite remote box press on the SHUTTER button.
The laser should now lase. If no lasing is observed increase “C”
delay until lasing is observed.
8. Adjust the Delay of “C” on the DG535 to maximize laser power.
Optimum “C” delay is normally between 200 µs and 1µs.
3) Remote RS232 operation
The CU601C can be controlled through the front panel RS232 D25 connec-
tor.
The RS232 control can be accomplished by interfacing an appropriate
cable between the CU601C and a host computer (see RS232 signals in
demo program on page 2-17 of this section). The remote box may be
removed from the CU601C if a control program is running on the host
computer. If the remote box is left plugged in, it will display the activities
of the CU601C while under control of the host computer. During power
up reset, the CU601C will “hunt” for an active controller (either the
remote box or the host RS232 computer). The CU601C will first look for a
RS232 host computer and then begin communications, if none is found it
will look for the remote box, if none is found then the CU601C will “time
out”. The RS232 controller must send a “keep alive” signal back to the
CU601C or else it will time out in approximately 5 seconds and default
to a “warm reset” state. When the remote box is the only controller, it
takes care of this “keep alive” (any character) with its own internal
microcomputer, unless the remote box is placed into the REMOTE mode
on RB601. The “keep alive” function is a safety feature to guarantee that
there is always some means of controlling the laser system.
a) Command protocol
The host computer control program sends command bytes to the
CU601C. These command bytes duplicate all of the keyboard keys on the
remote box. The following is a list of the command bytes:
Command byte Command
(hex) Description
011H PROGRAM INCREMENT
021H PROGRAM DECREMENT
031H STORE
041H ACTIVATE
012H PARAMETER INCREMENT
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