Auto_Change_Pos - Scanlab RTC 5 PC Interface Board Installation And Operation Manual

Ctrl Command auto_change_pos
Function activates a one-time automatic list change and simultaneously defines the list position at
which execution will continue.
Call
auto_change_pos( Pos )
Parameter
Pos
Comments • The auto_change_pos command triggers a subsequent one-time-only list change or a
list new start. For further list changes or list new starts, the command must be called
again.
• The command can be issued at any desired time point.
• If the automatic list change is activated during processing of a list, then upon reaching
set_end_of_list
the other list. If there is only one list (Mem2 = 0, see config_list), then upon reaching
set_end_of_list
• During processing of a list, the other list (and also the current list) can be newly loaded
(see "Automatic List Changing", page
• So that auto_change_pos can function at all, any already active list must absolutely 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 encoun-
tering a set_end_of_list, then execution will automatically continue at the beginning
of the current list.
• If an automatic list change is activated when no list is currently being processed, then
checking will take place as to whether a list was already processed and the other list
was started (at the supplied start position). If no list was previously executed, then
"List 1" will be regarded as already executed (initialization) and "List 2" will be started.
• If a list memory address outside the corresponding list area is supplied (depending on
which list should be started: Pos  Mem1 or Pos  Mem2), then the start position will be
set to the beginning of the list (Pos = 0).
• If, during processing of a list, the auto_change_pos( Pos >0 ) and
commands are called, then upon the next
auto_change_pos( Pos >0 ) will be executed; and at the next one the
command will be executed.
• The current list and list execution statuses can be queried via the commands
read_status (page 390)
• The auto_change_pos command triggers a flush of the list input buffer (see
® ®
RTC 4 RTC 5 essentially unchanged, however:
The list memory address (Pos) is supplied to the RTC
referenced to the beginning of the respective list, whereas the RTC
absolute memory address (0...7999). If no memory area is assigned to "List 2" via
config_list
References auto_change, get_status,
®
RTC 5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
Start position (list memory address) as an offset referenced to the beginning
of the list to be started via the automatic list change (as an unsigned 32-bit
value)
execution will continue without delay at the supplied start position of
execution will continue at the supplied start position of this list.
and get_status (page
®
(Mem2 = 0), then the RTC 5 command behaves like the RTC
read_status
75).
set_end_of_list the command
281).
®
5 as a relative memory address
®
start_loop
start_loop
page 71).
4 is supplied an
®
4 command.
239