Scanlab RTC 5 PC Interface Board - set_ext_start_delay

RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
422
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Ctrl Command set_ext_start_delay
Function sets a track delay for subsequent external list starts, so that the lists are started with a delay
relative to the triggering input signal or simulate_ext_start or simulate_ext_start_ctrl
command.
Call set_ext_start_delay( Delay, EncoderNo )
Parameters Delay track delay (counter steps of the selected encoder counter EncoderNo ) as a
signed 32-bit value; allowed range: [–2
31
…+(2
31
–1)]
EncoderNo Number of the to-be-used encoder counter as an unsigned 32-bit value,
allowed values:
= 0: Encoder counter Encoder0
= 1: Encoder counter Encoder1
Comments • For external list starts, see page 210.
• The track delay is specified in (relative) counting units of the selected encoder counter
(the RTC
®
5’s encoder counter is triggered via an external or simulated encoder signal,
see page 215).
• Ensure that the sign of the track delay (
Delay parameter) is appropriate for the selected
encoder’s counting direction (for external triggering, this corresponds to the work-
piece’s direction of motion).
•For
Delay = 0, the track delay is deactivated.
• If a track delay is specified, that causes a subsequent start trigger (initiated via
simulate_ext_start or an external start signal) to occur when the BUSY status or
INTERNAL-BUSY status is set (e.g. when outputting a list or during goto_xy), then no
list starts will get triggered by this start trigger (in this case, bit#11 of the
get_startstop_info return value will be set).
• Track delays can also be set with simulate_ext_start. Track delays are deactivated via
initialization (with load_program_file), via external list stops and via stop_execution.
They can also be deactivated with set_control_mode (bit#2).
• The command set_ext_start_delay cancels already externally triggered list starts that
haven’t yet executed and are still being held in a queue that accommodates up to 8
starts.
•If
EncoderNo > 1, then set_ext_start_delay will be ignored (get_last_error return code
RTC5_PARAM_ERROR ).
RTC
®
4  RTC
®
5 unchanged functionality (except for the extended range of values)
The RTC
®
5 allows this command to be used not only (as with the RTC
®
4) together with a
real encoder (hardware encoder), but also with an encoder simulation started via
simulate_encoder.
In RTC
®
4 compatibility mode, the RTC
®
5 multiplies the specified value for Delay by 16 (the
permissible range of values is correspondingly reduced).
References simulate_ext_start, set_ext_start_delay_list
set_extstartpos, set_extstartpos_list, set_control_mode