You have to define the IP address of the Serial to Ethernet converter and the Modbus address. The Modbus address depends on how your converter is configured. When it's configured to have Modbus slave(s) connected, the Modbus address = Modbus address of the slave. Be aware that you set your OPC request speed at a level that can be handled by the converter and your Modbus device.   When it's configured to have a specific slave connected, the Modbus address of the slave is probably defined in the converter. You should read the converters manual how to address the slave. When a Modbus Master is connected to the converter, your OPC server should be able to receive (unsolicited) data form the converter. I'm not sure if Matrikon OPC can do this. ... View more

I do not see the issues your having, So I can only suggest to contact your Schneider Electric support desk and please create a case. They will be able to help you. ... View more

I have copied this code to notepad and saved as DFB.XDB file. This file imported to an empty (new) project. Then the I have a lot of errors (39), of undefined variables and structures. Did you perform this test yourself, (export DFB and import into a new project)?   If you have the same issue, please create a case at your Schneider Electric support desk ... View more

I have not seen this issue. Can you share you're application so I can check on my system? ... View more

Hello @BevanWeiss ,   It's not possible to install multiple versions of Unity Pro / Control Expert on one machine. Application files can be opened in a later version of the software, without having to rebuild or download the application again (application is upward compatible) .  So in general there should be no reason why you use only one version (the latest).   But as some customers insist of standardizing one a specific version, programmers/system integrator's are forced to use this specific version as downward compatibility is not supported by Unity Pro / Control Expert (only upward compatibility).   In general this means that for those programmers working for multiple customers, it's best to have a specific VM, with all the software and specific versions installed for this specific customer. This includes  Unity Pro / Control Expert and all other version specific software and DTM's used by the customer, as most of the time it's not only the PLC programming software version you have to dela with. Using customer specific VM's you will have complete control of the installed software at the customers site, without compatibility issues. ... View more

Hello Osama,   This depends on the protocol used.In case of the MODNET protocol driver the Citect Help shows:   In the MODNET protocol, LONG data types default to a simplified implementation, with a shortened range of 0 to 99,999,999 for mode 0. 0 - implies 10,000 * low register + high register Mode 2 has the same range as mode 0, but with the register order swapped. 1 - implies 65,536 * low register + high register Mode 1 supports the complete LONG range of -2,147,483,648 to +2,147,483,647. Mode 3 has the same range as mode 1, but with the register order swapped. 2 - implies 10,000 * high register + low register When using the MODBUS protocol, Citect SCADA combines two registers to store a long data type in a PLC. The way in which it does this is defined by this parameter. 3 - implies 65,536 * high register + low register   Note: This parameter is not applicable if you are using the protocol variant MODNET20 or MODNET30 to communicate with a device. Under these circumstances, a value of 3 will be hardcoded for this parameter. With this parameter, you can set different values for specific I/O devices or groups of I/O devices. See Device/group-specific parameters. Default is 3   br Rene   ... View more