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Unable to Read Data from the Schneider Unity Pro Simulator When On the Same PC as the Server


Last Update: 11/7/2018

Problem:
KEPServerEX is unable to connect to Schneider Unity Pro's Simulation Mode, which uses TCP/IP address "127.0.0.1". Even though the reads are successful, only 0 values are returned.

Possible Cause:
The Modbus TCP/IP Ethernet driver becomes a virtual Modbus device when a home address or the Ethernet adapter's IP is used.

Solution:
Multi-home the Ethernet Card and then bind the Modbus channel to the new IP address (using the primary or initial IP). If multi-homing is not an option, use the Modbus RTU Serial driver in Ethernet Encapsulation Mode. Then, ensure that the "Use Modbus TCP/IP Headers" option is checked.

Related Products
Modbus Ethernet, Modbus Suite

Related Protocols
Modbus Ethernet