Diagnosis
This function block is used to gather several information from the PLC and the program structure for diagnosis purpose.
The occurrence of “real-time” errors will be shown at output “RTErr”. (New: This flag is set back when calling the block)
„Real-time errors” always occur, when the execution of the program task altogether takes longer, than the period (cycle time) specified for one cycle.
Example without “real-time errors” (by activating or deactivating macros, different program runtimes can occur):
Example with „real-time errors“ (by activating or deactivating macros, different program runtimes can occur):
Example with „real-time errors“ during online communication
Signals
| Name | I/O | Type(s) | Function |
|---|---|---|---|
| RTErr | O | BIT | Real-time error |