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Since October 2018 EES is delivering its universal fault annunciator series “USM” with the free of charge Modbus TCP implementation.
The device operates always as a Modbus slave (passive Modbus) with a Modbus address between 1 and 255. If Modbus TCP is used, the IP address of the communication partner (Modbus master) or for Modbus RTU the settings for the serial interface must be set in the parameterization which is accessible on the device through a Webserver. Then data is accessible via Modbus-registers or -coils.