RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
338
Ctrl Command load_position_control
Function loads a table with data points from an ASCII text file and determines – via linear
interpolation – the scaling function for position-dependent laser control (radial correction,
see page 141).
Call
NoOfDataPoints = load_position_control( Name, No )
Parameters
Name
name of the text file as a pointer to a null-terminated ANSI string
(the text file may contain one or more tables).
No
This parameter (an unsigned 32-bit value) specifies which table in the text file
shall be loaded (the parameter corresponds to the extension
<No>
of the
instruction
[PositionCtrlTable<No>]
at the beginning of the desired table).
Result signed 32-bit value (a positive error code in case of an error, the negative number of found
data points in case of success):
Value Description
– 1 to – 50 Success.
The absolute value of the return value is equal to the number of valid data points found in the table.
Invalid entries are ignored (also see page 143).
–256 for
Name
= 0 (also see comments)
1 No valid data points found (though Table
No
found).
3 File not found.
4 DSP memory error
5 BUSY error, board was BUSY or INTERNAL-BUSY, no download (get_last_error return code
RTC5_BUSY
).
8 Board is locked by another application (get_last_error return code
RTC5_ACCESS_DENIED
).
11 PCI error (get_last_error return code
RTC5_SEND_ERROR
),
verify error (get_last_error return code
RTC5_VERIFY_ERROR
)
13 The specified table number was not found in the file.
Comments • The format requirements for the text file’s table entries with data points for position-
dependent laser control are described in "Notes on Loading a Scaling Function" on
page 143. When loading the table, the RTC
®
5 determines suitable values for the entire
range of control values.
• The command load_position_control overwrites any previously loaded scaling func-
tion for position-dependent laser control.
•For
Name
= 0 (as during initialization via load_program_file), the scaling function
Scale(Position)=1.0 is loaded for the complete position range so that no position-
dependent correction takes place.
• Position-dependent laser control only takes effect during subsequent mark or arc
commands if it was initialized via set_auto_laser_control. Position-dependent laser
control is deactivated via set_auto_laser_control (
Ctrl
= 0) or by loading
Scale(Position)=1.0. Also see "Position-Dependent Laser Control", page 141.
•The load_position_control command will not be executed (get_last_error return
code:
RTC5_BUSY
) if the board’s BUSY status is currently set (list is being processed or
has been halted via pause_list) or the board’s INTERNAL-BUSY status is currently set. In
contrast, the command is executed when a list has been paused via set_wait (PAUSED
status set).
• During execution of load_position_control, external starts will be suppressed.
• Before loading a table, load_position_control performs a DSP memory check. In case
of an error, error code 4 is returned.
RTC
®
4
RTC
®
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