Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 447)

L-force | PLC Designer
The Resources
DMS 3.2 EN 02/2011 TD29 445
8.12 Target Settings - The Sampling Trace
8.12.1 Overview and Configuration
Sampling Trace in »PLC Designer«
Sample tracing will be available as an object in the PLC Designer resources, if it is
activated in the target settings (category 'General').It can be used to trace the
progression of values for variables is traced over a certain time. These values are
written in a ring buffer (trace buffer). If the memory is full, then the "oldest" values
from the start of the memory will be overwritten. As a maximum, 20 variables can be
traced at the same time. A maximum of 500 values can be traced per variable.
Since the size of the trace buffer in the PLC has a fixed value, in the event of very many
or very wide variables (DWORD), fewer than 500 values can be traced.
Example: if 10 WORD variables are traced and if the memory in the PLC is 5000 bytes
long, then, for every variable, 250 values can be traced.
In order to be able to perform a trace, open the object for a Sampling Trace in the
Resources register card in the Object Organizer. Create resp. load an appropriate trace
configuration and define the variables to be traced. (See 'Extras' 'Trace Configuration'
and 'Selection of the Variables to be Displayed').
After you have created the configuration and have started the trace in the PLC ('Start
Trace'), then the values of the variables will be traced. With 'Read Trace', the final
traced values will be read out and displayed graphically as curves.
A Trace (variable values and configuration) can be saved and reloaded in project
format (*.trc) or in XML format (*.mon). Just the configuration can be stored and
reloaded via a *.tcf-file.
Various traces can be available in a project for getting displayed. They are listed in a
selection list ('Trace') in the upper right corner of the trace window. You can select one
of those to be the currently used trace configuration.
Note!
If a task configuration is used for controlling the program, the trace functionality
refers to the debug task.