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CHAPTER 5 – Data Trace/Time Chart Monitor Component
CHAPTER 5
Data Trace/Time Chart Monitor Component
This chapter describes the Data Trace/Time Chart Monitor component and its ability to display either the
PLCs uploaded data trace buffer or monitored data obtained from the PLC’s memory areas during
program execution.
Data held in a PLC’s memory areas can be monitored and traced during program execution. When
displayed, this information provides a valuable tool for analysing the program’s performance.
The Data Trace/Time Chart Monitor component has two separate modes of operation:
♦
Data Trace. The PLC can be configured to trace a number of channels and bits and can sample these
when a trigger condition is activated. When the PLC trace buffer is full or the user stops the trace,
the trace buffer can be uploaded and viewed – the trace however, is complete. Values do not change
on the screen, all sampling is achieved in the PLC and displayed when finished.
♦
Time Chart Monitor. A number of channels and bits can be configured and monitored online. The
changing values are displayed in the monitoring view as either a trend graph or histogram. A trigger
condition can also be set which resets the sampled amount of data. Monitoring continues until
stopped by the user.
The status bar provides instant help, the PLC and CPU type, the current operating mode of the PLC and
the status of the Data Trace/Time Chart Monitor component.
The Toolbar and status bar can both be turned on or off. Select Status Bar from the View menu to control
the display of the status bar. Select Toolbar from the View menu to control the display of the Data
Trace/Time Chart Monitor toolbar.
Revision 1.7
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