?Corrected from:
PLC Designer V3.24
Response of the new version:
An online change can also be executed if the function blocks L_ETC_MMCController() or L_ETC_MMCControllerBus() are used in the PLC project.
What happens?
After a project change, no online change is possible. The following message appears in the download details:
POU changed, that inhibits an online change.
When does the behaviour occur?
If the function block L_ETC_MMCController() or L_ETC_MMCControllerBus() is used in a PLC project and a change is made in the function block (FB) or program (PRG), it can happen that an online change is no longer possible and the application must be completely downloaded into the controller.
Which products are affected?
PLC Designer as of V3.12
Cabinet Controller c300
Cabinet Controller 3200C
Cabinet Controller c520
Cabinet Controller c550
Cabinet Controller c750
Panel Controller p300
Panel Controller p500
Servo Inverter i950
Short-term measures:
Perform a full project download after the project change.
Evaluation / recommendations:
If the modular machine configuration is used in a PLC project, i.e. the functionality "Optional EtherCAT devices", then it may occur that an online change is no longer possible after a project change. Instead, a complete project download must be carried out, which may lead to the machine stopping.
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