MDC-700 Series


Modbus is the most common Industrial protocol and most PLC, Controllers, and industrial software can communicate via this protocol. Modbus Data Concentrators improve the efficiency of the SCADA computer by significantly reducing number of devices that are polled and makes data collection more efficient.

An MDC module takes the place of a Modbus master and is programmed to poll many serial Modbus slave devices and store their values into shared memory. Because serial communication is a slow process in general, many MDC modules polling serial devices one at a time is much more efficient than one main computer polling them one at a time. Then the SCADA computer can poll the MDC for the data from several machines at once; making the process much more efficient. When additional locations or equipment is introduced, they can add additional MDC at each location and only minimally slow down the data collection process.
 

Modbus Data Concentrator

The MDC performs the pre-defined Modbus/RTU commands to read/write data from/to the Modbus/RTU slave devices via the RS-232/485. It mirrors the data of the slave devices to its own shared memory. And it accepts up to 8 Modbus/TCP masters to directly read/write data form/to the shared memory instead of polling each Modbus/RTU slave device one by one.
This way not only makes the data on the RS-232/485 sharable to multiple Modbus/TCP master but also shorten the time to read/write data from/to multiple Modbus/RTU slave devices.

 

Great Capability of Shared Memory

The MDC can perform up to 250 polling definitions. And the internal shared memory has four tables to store the polled AI, AO, DI and DO data. Each table can store up to 9600 registers.
 

Config.CSV to Ease Hard Work of Editing a lot of Definition

The Modbus polling defi nition is defi ned in a Confi g.CSV fi le. Editing/checking a lot of polling defi nitions is a hard work and may have chance to make a mistake. A CSV format fi le can ease the work by using Excel. Furthermore, the built-in web server allows users import/export the Confi g.CSV via a simple mouse-click action.
 

Web Sever to Ease the Operating and Show Clear Information

The IP address, configuration file, Config.CSV can be simply configured via the Web server. And the performed results of all Modbus polling definition are shown on the web page. It is very easy to debug which Modbus/RTU device has communication problem. And the MDC fi rmware will skip the abnormal Modbus polling definition for a while to smoothly perform the whole polling without distribution.

 

Applications:

MDC-221-433

433 MHz Modbus Data Concentrator

 

Features

  • 433MHz Radio Frequency
  • Support the Modbus RTU/TCP protocol
  • Accelerate the Reading of Multiple Modbus RTU Devices
  • Modbus Polling Commands for up to 240 definitions
  • Data pool for up to 9600 Modbus Registers for each DI/DO/AI/AO
  • Support Radio Frequency, Ethernet and RS -232/485
 

Introduction

MDC -211 -433 is a Modbus data concentrator developed by ICP DAS, with Ethernet, 433MHz Wireless, RS - 232 and RS -485 communication interfaces, can link the Modbus RTU devices to the Ethernet network. MDC -211 -433 can read the data of Modbus RTU device according to the user -defined command table, and integrate the data of different Modbus RTU devices into the format of the continuous address so that the remote monitor host can connect to MDC -211 -433 from Ethernet to access the data of multiple Modbus RTU devices at once. Through MDC -211 -433's Modbus data centralized management function, as well as the Ethernet network convenient link and the communication ability, it can quickly establish a stable remote monitoring system, simplify the complexity during the process of data acquisition operation, reduces the Ethernet network traffic load, and enhances the system efficiency.





 

MDC-211-WF

Wi-Fi Modbus Data Concentrator
 

Features:

  • Compatible with IEEE 802.11 a/b/g standards
  • Support Infrastructure and Limit -AP mode 
  • Support WEP, WPA and WPA2 encryption mechanism 
  • Support the Modbus TCP/RTU protocol 
  • Compatible with WF -2000 I/O modules 
  • Support Ethernet, RS -232/485 and Wi -Fi interfaces
 

Introduction:

MDC -211 -WF is a Modbus Data Concentrator used to access data from disparate Modbus slave devices with a contiguous Modbus address table ranged by the concentrator. Up to 240 Modbus commands can be performed to read data from Modbus slave devices via Wi -Fi/RS -232/485, and up to 6 Modbus/TCP masters are allowed to get the polled data via the Ethernet. The Modbus/TCP masters directly read/write the data in the MDC -211 -WF instead of polling each Modbus slave device one by one. This way not only makes the data on the Wi -Fi/RS -232/485 sharable to multiple Modbus/ TCP master but also shorten the time to read/write data from/to multiple Modbus/RTU slave devices.





 

MDC-211-ZT

ZigBee Modbus Data Concentrator

 

Features:

  • Fully Compliant with 2.4 G (IEEE802.15.4/ ZigBee Specifications)
  • Upgrade ZigBee I/O modules with Ethernet communication ability
  • Support the Modbus TCP/RTU protocol
  • Support the MQTT v3.1 Client protocol
  • Support I/O data logger (MicroSD) function
  • Data pool for up to 9600 registers
  • Modbus polling commands for up to 240 definitions
  • Speed up the time for reading from ZT -2000 series modules
    Support ZigBee, Ethernet and RS 232/485 interfaces


Introduction:

MDC -211 -ZT is a Modbus Data Concentrator used to centrally manage decentralized I/O data via the ZigBee wireless mesh network. It access data from disparate Modbus slave devices with a contiguous Modbus address table ranged by the concentrator. Up to 240 Modbus commands can be performed to read data from Modbus slave devices via ZigBee/RS -232/RS - 485, and up to 8 Modbus/TCP masters are allowed to get the polled data via the Ethernet. This way not only makes the data on the ZigBee/RS -232/RS -485 sharable to multiple Modbus/TCP master but also reduce the flow of ZigBee/Ethernet traffic load to improve the system performance. It is the best solution for users quickly establishing a remote monitoring system.

Modbus Data Concentrator
Series Model Wireless Data Logger Wired
Standard Frequency Specialized I/O Module Data Logger Ethernet RS-232 RS-485
MDC-711 - - - - 10/100M 1 1
MDC-714 - - - - 1 4
MDC-714i - - - - 1 1 (non-isolated)
3 (isolated)
MDC-741 - - - - 4 1
MDC-771 - - - - 7 1
MDCL-705i - - - Yes 10/100M - 2 (non-isolated)
3 (isolated)
MDC-211-WF Wi-Fi 2.4 GHz
5 GHz
- - 10/100M 1 1
MDC-211-ZT
 
ZigBee 2.4 GHz ZT-2000 series - 1 1
MDC-211-433
 
Radio 433 MHz - (Note1) - 1 1
Note1: can connect regular RS-232/485 I/O modules through a radio to RS-232/485 converter, RFU-433.