Fieldgate FXA42
Operation
Hauser
57
8.3.5
Running the diagram
Click the
Start
button in the toolbar to start the execution of the diagram that has been
saved to the PLC. While the PLC is running, the
Start
button changes to the
Stop
button.
Click the
Stop
button to stop the PLC.
IPO cycle
While the diagram is being executed, the device's runtime system executes an IPO cycle
(Input-Process-Output). This means that the inputs are read out first of all (both the
physical inputs and the variables and constants). The units are processed and the outputs
(the physical outputs and the variables) are then written. The cycle time can be configured
in the Diagram Settings dialog.
Note that events that persist for a shorter period of time might not be recognized.
Running state at start-up
The PLC stores its current running state in the non-volatile memory. If the PLC is
disconnected from the power supply when it is running, it will it will start running after
next start-up.
Event log messages
Event log messages are messages that the PLC may log to the event log. All messages are
prefixed with the text
PLC Driver
.
The PLC has been started.
The PLC has been started successfully.
The PLC has been stopped.
The PLC has been stopped successfully.
A new diagram has been saved.
A new diagram has been saved successfully to the PLC.
-10
Out of memory
-12
Internal data queue overflow: data was produced faster than it could be processed.
Contact customer support if an error code is displayed that is not listed here.
Exception in task: <message>
A fatal exception has occurred inside the PLC task. A detailed description is provided.
Contact customer support.
8.3.6
Live view
Via the Live view function it is possible to see the current state of the PLC directly in the
diagram view. Once you click the
Live view
button in the toolbar of the editor program, the
actual value of each output port is displayed in a small blue field next to the port (see the
following graphic).