Monitoring
During monitoring in online mode, as long as a login to the application exists, the online status and the monitored values of visible variables are taken cyclically from the controller and displayed in the implementation and declaration part of the respective object.
For the display in the implementation view, see: Safety FBD Editor in Online Mode
For the display in the declaration view, see: Variable Declaration Editor in Online Mode
Monitoring works both in safe mode and in debug mode (with reading access)
Caution
The displayed monitoring value for a variable is a value that this variable had on the connected controller. This value is not necessarily the current value, i.e. the value can have already changed again on the controller. The monitoring display in the safety editor in online mode is suitable only for the proof that a certain value or state was once adopted. All values displayed simultaneously in a safety editor in online mode were also present in the displayed combination on the safety controller at the end of an application cycle (cycle-consistent monitoring). Therefore the monitoring display can be used as an auxiliary function in order to verify the branch coverage of tests on the basis of flag variables (see: Safety User Manual)
The monitoring of the variables in the declaration window and in the implementation window of the POU is qualified and is suitable for the verification.