RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
512
Ctrl Command start_loop
Function starts a repeating automatic list change
Call
start_loop()
Comments • A list change or new list start activated with start_loop will repeat until execution is
ended via calling the command quit_loop.
• The command start_loop can be issued at any desired time point, but will only have
effect upon the next set_end_of_list command.
• If the automatic list change is activated during processing of a list, then upon reaching
set_end_of_list execution will continue without delay at the other list. If there is only
one list (
Mem2
= 0, see config_list), then upon reaching set_end_of_list execution will
continue at Pos = 0 (i.e. at the list’s beginning).
• During processing of a list, the other list (and also the current list) can be newly loaded
(see "Automatic List Changing", page 75)
• So that the start_loop command can function at all, the already active list must abso-
lutely be finalized via set_end_of_list; the new list should already be loaded and the
input pointer should be sufficiently ahead of the output pointer (otherwise, “old”
commands will be executed). If, during list execution, the end of the list is reached
without encountering a set_end_of_list, then execution will automatically continue at
the beginning of the current list, not at the beginning of the other list.
• If, during processing of a list, the start_loop and auto_change_pos(
Pos
>0 )
commands are called, then upon the next set_end_of_list the command
auto_change_pos(
Pos
>0 ) will be executed; and at the next one the start_loop
command will be executed.
• The current list and list execution statuses can be queried via the commands
read_status (page 390) and get_status (page 281).
•The start_loop command triggers a flush of the list input buffer (see page 71).
RTC
®
4
RTC
®
5 unchanged
References quit_loop
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