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1. Introduction
The MDCL-705i module is a Modbus Data Concentrator with data logger function, which can
concentrate data from several Modbus RTU slave devices through standard RS-485 interfaces, and
allows Modbus TCP masters to read/write data via Ethernet/LAN. The Modbus master can use one
Modbus command to get all data with the same type from various Modbus RTU slave devices via the
concentrator. In other words, through the help of a MDCL module, the Modbus RTU slave devices
can be accessed over Ethernet with better read and write performance.
Up to 250 Modbus RTU commands to read data from Modbus RTU slave devices can be performed in
the MDCL module and up to 8 Modbus TCP masters can connect the module to get the polled data.
The support for data logger allows users to pick-up up to 120 parameters for long-term logging.
Users can download data log files (CSV file) from the web interface or transfer the files to FTP server
for advanced analysis.