Scanlab RTC 5 PC Interface Board, Installation And Operation Manual

Page: 488 / 622

RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
488
innovators for industry
Ctrl Command set_standby
Function defines the output period and the pulse length of the standby pulses for “laser standby”
operation or – in laser mode 4 and laser mode 6 – the continuously-running laser signals
for “laser active” and “laser standby” operation.
Call
set_standby( HalfPeriod, PulseLength )
Parameters
HalfPeriod
half of the standby output period as an unsigned 32-bit value.
1 bit equals 1/64 µ s. Allowed range: [0 … +(2
32
–
1)]
PulseLength
Pulse length of the standby pulses as an unsigned 32-bit value.
1 bit equals 1/64
µ
s. Allowed range: [0 … (2
32
–
1)]
Comments • After a hardware reset, (and after load_program_file ), the LASER1, LASER2 and
LASERON ports must be first-time-activated with set_laser_control before standby
pulses can be activated via set_standby or set_standby_list (see page 128 ). At the
same time, the signal level of the standby pulses can be defined with set_laser_control .
• The standby pulses are available in all laser modes (YAG 1/2/3/5, CO
2
, laser mode 4 and
6). They can be deactivated (turned off) by setting the standby pulse length and/or the
standby output period to zero (default).
• Note that half the standby output period must be specified for
HalfPeriod
(see
figure 48 on page 131 and figure 50 on page 136 ).
• If the softstart mode is used (see page 135 ),
HalfPeriod
should not be smaller than 104
(this is not automatically checked). This value corresponds to a laser pulse frequency of
approx. 308 kHz.
• If
PulseLength
is larger than the output period (2 ·
HalfPeriod
), the laser will be perma-
nently on.
• The time base for the stand-by pulses is always 64 MHz (i.e. 1 bit equals 1/64 µ s).
• The laser control mode has to be set with the command set_laser_mode (also see
chapter 7.4 "Laser Control", page 128 ). To set the active output period and pulse length
for the “laser active” laser control signals (beside for laser mode 4 and 6), use the
command
set_laser_pulses_ctrl , set_laser_pulses or set_laser_timing .
RTC
®
4

RTC
®
5 essentially unchanged functionality (except for the extended range of values), however:
•
HalfPeriod
and
PulseLength
must be specified in units of 1/64 µ s with the RTC
®
5; in
RTC
®
4 compatibility mode they are specified in units of 1/8 µ s (as with the RTC
®
4). In
RTC
®
4 compatibility mode, the RTC
®
5 multiplies the specified values by 8 (the permis-
sible range of values is correspondingly reduced; the smallest reasonable value for
HalfPeriod
with softstart mode is then 13).
• under some circumstances, set_laser_control must be called before set_standby (see
above).
References set_standby_list , get_standby