Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 338)

L-force | PLC Designer
Editors in PLC Designer
336 DMS 3.2 EN 02/2011 TD29

'Extras' 'Order' 'Show Order'
This command switches the display of the order of execution on and off. The default
setting is to show it (recognised by a tick (9) in front of the menu point).
The relevant order of execution number appears in the upper right hand corner for the
elements block, output, jump, return and label.
'Extras' 'Order' 'Order topologically'
Elements are ordered in a topological sequence when the execution takes place from
left to right and from above to below, that is the number increases from left to right
and from above to below for topologically arranged elements. The connections are not
relevant, only the location of the elements is important.
All selected elements are topologically arranged when the command 'Extras' 'Order'
'Order topologically' is executed. All elements in the selection are taken out of the
sequential processing list by this process. The elements are then entered into the
remaining sequential processing list individually from bottom right through to upper
left. Each marked element is entered into the sequential processing list before its
topological successor, i.e. it is inserted before the element that in a topological
sequencing would be executed after it, when all elements in the editor were
sequenced according to a topological sequencing system. This will be clarified by an
example.
The elements with numbers 1, 2 and 3 are selected. If the command 'Order
topologically' is selected the elements are first taken out of the sequential processing
list. Var3, the jump and the AND-operator are then inserted again one after the other.
Var3 is placed before the label and receives the number 2. The jump is then ordered
and receives the number 4 at first but this then becomes 5 after the AND is inserted.