Scanlab RTC 5 PC Interface Board - set_sub_pointer

RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
491
innovators for industry
Ctrl Command set_sub_pointer
Function stores the absolute start address of a command list in the internal management table for
indexed subroutines.
Call
set_sub_pointer( Index, Pos )
Parameters Index Index of the indexed subroutine whose starting address Pos should be
entered in the management table (as an unsigned 32-bit value, allowed
range: [0 … 1023]).
Pos Absolute start address as an unsigned 32-bit value;
allowed range: [0 … (2
20
–1)]
Comments • If
Index > 1023 and/or Pos > (2
20
–1), then the command will not be executed
(get_last_error return code
RTC5_PARAM_ERROR ).
•The set_sub_pointer command can be used for referencing a nonindexed subroutine,
which thereby becomes an indexed subroutine that is protectable via
save_disk/load_disk and/or callable via the index.
• set_sub_pointer can also be used to reference anew an indexed subroutine, character
or text string so that it can also be called via a second index. Here, it is preferable to use
the copy_dst_src command for index management.
• The start addresses of command lists that are to be referenced with set_sub_pointer
can be queried via get_input_pointer before loading the command lists.
• set_sub_pointer only stores starting addresses in the internal management table. An
indexed subroutine only gains protection via a subsequent save_disk/load_disk
command.
•
Pos should not be an arbitrary address within a list. Instead, it should be the starting
address of an actually existing subroutine that was finalized via list_return and does
not contain set_end_of_list.
RTC
®
4  RTC
®
5 new command
References load_sub