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What are your connection settings in VisiLogic? I recommend that you be local to the PLC when trying to set up and troubleshoot communications.
Communications between VisiLogic and the PLC do not use MODBUS. The MODBUS settings should have no effect on your connection using VisiLogic unless you are stepping on port 20256 inadvertently.
Sorry, I change Network ID in MODBUS_IP_CONFIG from number 255 to number 1.
I am outside from the local network, connected via VPN, and to Unitronics ethernet card.
I put parallel contac with SB2, and set it. After taht can not establish connection. I can ping PLC but can't go online.
It may be necessary in the future to allow the formatting of large cards into a small capacity (limit its capabilities to FAT32 accordingly).
If it is possible to do it at all with new large capacity cards.
Alternatively, add an card format option to PLC info mode (uni app) functionality.
P.S. It has been done in drives that replace 1.44fdd. They format the flash media themselves into 100 small virtual disks.