Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 234)

L-force | PLC Designer
The Individual Components
232 DMS 3.2 EN 02/2011 TD29

6.6.20 'Online' 'Display Flow Control'
Depending on the target system settings the user can activate resp. deactivate the
Flow Control function. If it is activated, a check (9) will appear in front of the menu
item. Following this, every line or every network will be marked which was executed in
the last PLC Cycle.
The line number field or the network number field of the lines or networks which just
run will be displayed in green. An additional field is added in the IL-Editor in which the
present contents of the accumulator are displayed. In the graphic editors for the
Function Block Diagram and Ladder Diagram, an additional field will be inserted in all
connecting lines not transporting any Boolean values. When these Out- and Inputs are
verified, then the value that is transported over the connecting line will be shown in
this field. Connecting lines that transport only Boolean values will be shaded blue
when they transport TRUE. This enables constant monitoring of the information flow.
Note!
The runtime of a program will be increased by using flow control. This might cause
timeouts in time-cyclic programs with high load.
At active breakpoint positions there is no flow control display.
If a watchdog has been defined for the concerned task, this will be switched off
when the flow control is active.
6.6.21 'Online' 'Simulation'
If Simulation Mode is chosen, then a check (9) will appear in front of the menu item.
In the simulation mode, the user program runs on the same PC under Windows. This
mode is used to test the project. The communication between the PC and Simulation
Mode uses the Windows Message mechanism.
If the program is not in simulation mode, then the program will run on the PLC. The
communication between the PC and the PLC typically runs over the serial interface.
The status of this flag is stored with the project.
Note!
POUs of external libraries will not run in simulation mode.