Introduction - ICP DAS USA MDC-700 Series User Manual

1. Introduction
The MDC‐700 series module is a Modbus Data Concentrator which can concentrate data from
several Modbus RTU slave devices with RS232/RS‐485 interface and allows Modbus TCP masters to
read/write data via Ethernet/LAN. The Modbus master can use one Modbus command to get all data
on those Modbus RTU slave devices via the MDC‐700 concentrator. In other words, through the help
of a MDC‐700 module, the Modbus RTU slave devices can be accessed over Ethernet with better
read and write performance.
The MDC‐700 series module has the ability to perform up to 240 Modbus RTU commands to
read/write data from/to Modbus RTU slave devices and allows up to 8 Modbus TCP masters to get
the polled data. The support for Modbus TCP protocol makes the MDC‐700 well integrated into
PC‐based applications such as SCADA (Supervisor Control and Data Acquisition) and HMI (Human
Machine Interface) programs.
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