There is no way to prevent the overflow error, but you can just reset the overflow bit after the execution of your function. Or prevent the execution of the function if it will lead to an overflow. The system diagnostic can be disabled if you don’t want to log this kind of errors. ... View more

Hi, There is no need to change the type in Control Expert, you can let the WORD type. In Citect define a type with UINT and the address on the Control Expert variable type WORD and that's it.  Normally when you use a WORD format in Control Expert, it is to use Bits inside. They can be extracted in Citect with the BITAND function. If you need to read the bit 4 of a tag named MyTag (type UINT, mapped on a Control Expert variable type WORD), the function will be MyTag BITAND 0x0010. It can be used for animation, alarms or to set a DIGITAL Tag variable (Address will be MyTag BITAND 0x0010)   ... View more

WORD type doesn't exist as Type of Tags in Citect SCada. Depending what you want to do with the variable read from the M580, you can choose any 16 bits type ( 2 bytes long). see the table here after: ... View more

I just tested the color settings and didn't find a way to change the colors of the link and the color of the blocks: ... View more

I did the test and I don't encounter the issue. Did you try to export the DFB and import It,? After exporting the DFB you could edit the file and see if there is no issue in the XML, like strange characters... You could also create a new DFB, and copy paste the code from the old one to the new one and use the replace function to overvome the issue.   ... View more

Control Expert (ex Unity Pro) allows to manage several application versions. Opening a STA file keeps the build state of the application with exactly the same signature than the project running in the PLC. the binary created during the build is embedded in the STA file to provide this feature, unlike the XEF or ZEF files which contain only the source. After opening an STA file you can connect to the PLC and do online modification. Control expert will work with the same library used for the application. For example if you use Control expert V14.1 you can open an STA V6 application. The library used will be the V6, ensuring the compatibility with the running project.To open the program with an older version of Unity Pro you will have to archive it (STA), it will keep the application version, the customer will be able to open it in its old version of Unity Pro.  it may happen, in exceptional rare circumstances , that the status of the application is not build after opening the STA, but even in that case you can connect to the PLC and perform an online build, without stopping the PLC.     ... View more

Hello, There is a communication control on Modbus, the ATV controls that there are requests sent periodically. Normally if you read the status of the ATV periodically, it is enough to maintain the control of the communication. Here after an extract from the documentation:   ... View more