Which products are affected?
PLC Designer V3.1
L_DCO_DriveCommunication library V3.1.0.0
When does the problem occur?
It is not possible to write a parameter with a negative value via the visualisation
The L_DCO_WriteDriveParameter function block from the L_DCO_DriveCommunication library is equipped with a visualisation function. It is not possible to enter a negative value via the dwData field since the value is displayed in 'unsigned' format. As a result, a parameter cannot be written with a negative value via the visualisation.
Possible diagnostics?
None.
Kurzfristige Maßnahmen/Empfehlungen?
Use the dwData input of the L_DCO_WriteDriveParameter function block for negative values. Legen Sie den negativen Wert direkt an den Eingang des Funktionsbausteins L_DCO_WriteDriveParameter.
Evaluation:
The dwData field is visualised in unsigned format by fhe L_DCO_WriteDriveParameter function block. Therefore, it is impossible to enter negative values in this field. As a result, parameters cannot be written with negative values via the visualisation.
