ICP DAS USA MDC-211-WF User manual

MDC-211-WF
User Manual
Warranty
All products manufactured by ICP DAS are under warranty regarding
defective materials for a period of one year, beginning from the date of
delivery to the original purchaser.
Warning
ICP DAS assumes no liability for any damage resulting from the use of
this product. ICP DAS reserves the right to change this manual at any
time without notice. The information furnished by ICP DAS is believed to
be accurate and reliable. However, no responsibility is assumed by ICP
DAS for its use, or for any infringements of patents or other rights of
third parties resulting from its use.
Copyright
Copyright © 2020 by ICP DAS. All rights are reserved.
Trademarks
Names are used for identification purposes only and may be registered
trademarks of their respective companies.
Technical Support
If you have any problems, feel free to contact us via email at
[e-mail].

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Table of Contents
1. Introduction ............................................ 3
1.1. Introduction to MDC-211-WF................................................................................. 3
1.2. Product Features....................................................................................................... 4
1.3. Specifications ............................................................................................................ 7
1.4. Size (Unit : mm) ........................................................................................................ 8
1.5. Configuration Instructions ...................................................................................... 9
2. Getting Started With MDC-211-WF ...................... 10
2.1. Preparation.............................................................................................................. 11
2.2. Login MDC-211-WF Web Interface ...................................................................... 14
2.3. Set Port Information .............................................................................................. 15
2.4. Set MDC-211-WF as Modbus Master................................................................... 18
2.5. Set MDC-211-WF as Modbus Slave...................................................................... 20
2.6. Check Modbus RTU Device Communication Status ........................................... 21
2.6.1. Check polling status of Modbus command ......................................................21
2.6.2. Inquire Corresponding Modbus Register Address..........................................23
2.6.3. Testing I/O Channel Status of Modbus RTU Device........................................24
3. Export and Import the System Settings .................. 25
3.1. Export and Import the Configurations ................................................................ 25
3.2. Format Descriptions for the Configuration File (*.csv)...................................... 27
4. Parameter Descriptions ................................. 34
4.1. Communication Interface Parameter Descriptions ............................................ 34
4.1.1. Wi-Fi Communication Interface...........................................................................34
4.1.2. Serial Port Communication Interface .................................................................35
4.2. Modbus Protocol Parameter Descriptions .......................................................... 36
4.2.1. Modbus Master Setting Parameters ...................................................................36
4.2.2. Modbus Slave Setting Parameters ......................................................................37

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5. FAQ ................................................... 38
Q1 - What are the maximum numbers of polling definition and Internal Register in a
MDC-211-WF?.................................................................................................................... 38
Q2 - What is the maximum number of data can be accessed in one command from a
Modbus Master device? .................................................................................................... 38
Q3 - How are the Internal Registers corresponding to the polled data in a MDC-211-
WF? 38
Q4 - How to read each MDC-211-WF command status via the Modbus communication?
38
Q5 - How to update the firmware?.................................................................................. 40
6. Appendix .............................................. 43
6.1. LED Indicator State Descriptions .......................................................................... 43

ICP DAS, MDC-211-WF user manual , v1.1 Page 3
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1. Introduction
This section describes the functions, features, software, and hardware specifications of the
MDC-211-WF Modbus data concentrator.
1.1. Introduction to MDC-211-WF
◆Functions
MDC-211-WF Modbus data concentrator developed by ICP DAS, with Ethernet, Wi-Fi
Wireless, RS-232 and RS-485 communication interfaces, can link the Modbus RTU devices to
the Ethernet network. MDC-211-WF 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-WF from Ethernet to access the data of multiple Modbus RTU devices at once.
Through MDC-211-WF's Modbus data centralized management function, as well as the
Ethernet network convenient link and the communication ability, can quickly establish the
stable remote monitoring system, let the user be able to easily simplify the data acquisition
difficulty, and reduces the Ethernet network traffic load, enhances the system efficiency.
◆Advantages
The advantages of MDC-211-WF Modbus data concentrator, not only to help users
manage the Modbus RTU devices near the RS-232 and RS-485, even in the distance tough
cabling environment, can through the Wi-Fi wireless communication advantages, easy to link
the Modbus RTU devices.
In particular, in the widely used Supervisory Control and Data Acquisition (SCADA), with
simple settings, MDC-211-WF Modbus data concentrator can link the distributed Modbus
RTU devices to the Ethernet network, which is the best solution for the user to establish the
remote monitoring control system quickly.

ICP DAS, MDC-211-WF user manual , v1.1 Page 4
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1.2. Product Features
◆Support Modbus RTU Master
The Wi-Fi, RS-485, or RS-232 on the MDC-211-WF can be set as Modbus Master. MDC-
211-WF can read the data of the 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 for centralized management.
◆Support Modbus TCP/RTU Slave
The Wi-Fi, RS-485, RS-232 or Ethernet on the MDC-211-WF can be set as Modbus Slave,
so the control host can access multiple Modbus RTU devices via MDC-211-WF at once.
By establishing the function of Modbus Master and Modbus Slave, the Modbus data
monitoring control system will be more efficient, stable and flexible to meet the diverse
application sites.
◆Support Web-based UI Operations
MDC-211-WF provides a simple, friendly Web interface (UI), users can login the MDC-
211-WF Web page via a Web Browser to set up and real-time detect the MDC-211-WF for
the communication status and update frequency of each Modbus RTU command.

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◆Support Parameter Setting via CSV File
CSV (Comma-Separated Values) is a text file format that can be edited in spreadsheet
software or plain text files and has the advantage of being easy to use, read and maintain.
MDC-211-WF parameter setting includes the Modbus TCP communication ID and port
number, the Serial port communication parameters and the Modbus RTU commands that
settings can also be edited in a *.csv file and import into the MDC-211-WF from the Web UI,
and then start to monitor the data of the remote Modbus RTU devices.
◆Support Wi-Fi Communication Protocol
The MDC-211-WF support Wi-Fi standard (IEEE 802.11 a/b/g/n). User can access the data
of Modbus/RTU by Wi-Fi. User can reduce the wire because of wireless communication.
Otherwise, the MDC-211-WF also support 5 GHz. The 5 GHz can avoid the other interferences
from 2.4 GHz.
MDC-211-WF supports two Wi-Fi modes. One is Wi-Fi AP(Limit-AP). The other is AP Client
(Infrastructure) mode. The following figure has shown the application of each mode.

ICP DAS, MDC-211-WF user manual , v1.1 Page 6
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1. Limit-AP Mode
The MDC-211-WF is a Modbus/RTU to Modbus/TCP gateway in Limit-AP mode. The
device can connect to MDC-211-WF by Wi-Fi. The device can connect to the WF-2572M
when it didn’t have Wi-Fi function. The device can send Modbus/TCP command to acquire
data from Modbus/RTU device.
2. Infrastructure mode
The MDC-211-WF is a Wi-Fi AP client in the Wi-Fi infrastructure mode. The MDC-211-
WF can connect to other Wi-Fi AP. The SCADA/HMI and control center can connect
together by Ethernet switch. The device can send Modbus/TCP command to acquire data
from Modbus/RTU device.
RS-485
M-7000 tM DL-100 PM-3000
PAC
RS-232
MDC-211-WF
(Limit AP Mode)
SCADA/HMI
Ethernet
WF-2572M Control Center
Wi-Fi
2.4/5 GHz
RS-485
M-7000 tM DL-100 PM-3000
PAC
RS-232
MDC-211-WF
(Infrastructure Mode)
APW77BAM
(Wi-Fi AP)
Switch
SCADA/HMI
Ethernet
Control Center
Wi-Fi
2.4/5 GHz

ICP DAS, MDC-211-WF user manual , v1.1 Page 7
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1.3. Specifications
MDC-211-WF
Radio Standard
Standard
IEEE 802.11 a/b/g/n
Band
2.4 GHz: CH1~11; 5 GHz: CH36、40、44、48
Mode
Limit-AP/Infrasturcture
Encryption
Open/WEP/WPA/WPA2
Antenna
Omni-Directional; 3 dBi @ 2.4 GHz; 5.5 dBi @ 5 GHz
Transmit Range (LOS)
50 m (LOS)
Protocol
Modbus TCP slave
Ethernet Network
Port
x1, 10/100 Base-TX
Protocol
Modbus TCP Slave
Serial port (COM)
RS-232
x1, (TxD, RxD and GND)
RS-485
x1, (D+, D-)
Baud Rate
1200 ~ 115200 (bps)
Data Format
N81, N82, O71, O81, E71, E81, S71, S81, M71, M81
Protocol
Modbus RTU Master/Slave
Polling Definition
Up to 240 Modbus command definitions for all Wi-Fi/RS-
232/ RS-485 ports
Shared Memory
9600 registers for each of AI, AO, DI and DO data
Institutions
Casing
Metal
Dimensions (L x W x H)
120 mm x 33 mm x 116 mm
Installation
DIN-Rail
Power
Required Supply Voltage
+10 VDC ~ +30 VDC
Power Consumption
5 W @ 24 VDC
Environment
Operating Temperature
-25°C ~ +75°C
Storage Temperature
-30°C ~ +80°C
Humidity
10~90% RH, Non-condensing

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1.4. Size (Unit : mm)
Top view
Right view
Front view
Bottom view
Post view
Left view

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1.5. Configuration Instructions
Antenna
LED Indicator
MicroSD Card
Ethernet Port
Terminal Block
The MDC-211-WF is equipped with a RJ45 port for
Ethernet LAN connection. When 100BASE‐TX is
operating, the 10/100M LED is lit orange. When
10BASE‐T is operating or the machine is not connected
to the network, it is turned off. When an Ethernet link is
detected and an Ethernet packet is received, the Link/Act
LED is lit green.
RS-232
FW (Update)
RS-485
INIT
Power

ICP DAS, MDC-211-WF user manual , v1.1 Page 10
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2. Getting Started With MDC-211-WF
This chapter mainly describes the operation process of the MDC-211-WF, such as, how
to use the MDC-211-WF Web interface via browser, and set up the Modbus Master and
Modbus Slave function for the Modbus data concentrator.
◆MDC-211-WF Setting Flowchart
Preparation
•Hardware wiring
•Set the MDC-211-WF and PC to the same local area network. (The default IP address of
MDC-211-WF is 192.168.255.1)
Web Login
•Launch the browser and enter the IP address of MDC-211-WF
•login MDC-211-WF (Both the default account and password are "Admin")
•Change a new account/password for higher security
Port
Settings
•Configure communication port settings according to the user needs.
Modbus
Master
•Set the communication interface to Modbus Master according to the actual requirements,
and adjust the related setting parameter values.
•Add Modbus RTU commands to specific communication port for Modbus data
acquisition.
Modbus
Slave
•Set the communication interface to Modbus Slave according to the actual requirements,
and set its Modbus Slave ID.
System
Backup
•Export: Export the MDC-211-WF setting parameters to a. csv file for backup.
•Import: Import the configurations into the MDC-211-WF via a .csv file.
Check
Polling State
•Check the polling state of each Modbus commands.
•Get the address mapping table between the remote Modbus RTU devices and Internal
Registers of MDC-211-WF.

ICP DAS, MDC-211-WF user manual , v1.1 Page 11
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2.1. Preparation
Before setting up the MDC-211-WF, please complete the necessary preparation,
including hardware wiring, IP address settings, and so on, this section describes each.
◆Hardware Wiring
Please follow Figure 2.1 wiring diagram, to wire the following items:
1. Power Supply : +10 VDC ~ +30 VDC
2. RS-485：D+ & D-
3. RS-232：TxD / RxD / GND
4. Ethernet：Connect the MDC-211-WF and computer into the same LAN through cable or
Ethernet Switch/Hub.
Figure 2.1 MDC-211-WF Wiring Diagram
RS-485
F.G.
P.GND
PWR
INIT
D-
D+
GND
RxD
TxD
RS-232
Power
Supply
Link/Act
10/100M
FW

ICP DAS, MDC-211-WF user manual , v1.1 Page 12
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◆Modifying IP address
Before connecting the MDC-211-WF, please set the MDC-211-WF to be the same LAN
as the PC. Tables 2.1 shows the default network setting of MDC-211-WF. If it is in the different
network area, please adjust network settings by the following software.
(1) eSearch Utility
http://ftp.icpdas.com/pub/cd/tinymodules/napdos/software/esearch/windows/
Table 2.1 Factory default network settings of MDC-211-WF
IP
192.168.255.1
Mask
255.255.0.0
Gateway
192.168.0.1
The following steps show how to modify the MDC-211-WF network settings through
eSearch Utility:
Steps 1 Click “Search Server” button to search for MDC-211-WF module
Steps 2 Select “MDC-211-WF”, and click “Configuration (UDP)” button, as shown in Figure 2.2
Fiagram 2.2 eSearch Utility operator interfaces
Step 3 Configure the network parameters in the pop-up settings window, and click "OK"
button to modify the network settings, as shown in Figure 2.3.

ICP DAS, MDC-211-WF user manual , v1.1 Page 13
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Figure. 2.3 Network parameter setting interface
Step 4 Finally, click "Search Server" button again to find the MDC-211-WF module, to confirm
that the network settings has been modified successfully.

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2.2. Login MDC-211-WF Web Interface
This section describes how to login the MDC-211-WF Web interface.
Step1 Once the PC and MDC-211-WF are in the same LAN, user can login the MDC-211-WF
by entering the IP address on Web browser (IE11/Chrome/Firefox, resolution 800 x 600
or more is recommended), the login screen is shown as Figure 2.4:
Figure 2.4 Product Login Page
Step2 Enter the account and password for the MDC-211-WF Web page (case-insensitive)
and click the "Login" button.
-Default Account : Admin
-Default Password : Admin
Step3 Click "System Information" → "Account Management" to modify account and
password for higher security, as shown in Figure 2.5
Figure 2.5 Account Management

ICP DAS, MDC-211-WF user manual , v1.1 Page 15
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2.3. Set Port Information
MDC-211-WF provides one port Wi-Fi, one port Ethernet, one port RS-232 and one port
RS-485 communication interface, this section introduces the configuration procedure for
these communication interface.
◆Wi-Fi Port Setting
Click "Module Setting" → "Wi-Fi", to read the current Wi-Fi setting parameters, if user
want to adjust the Wi-Fi settings, click the "Modify" button to switch to the configuration
page, as shown in Figure 2.6.
Figure 2.6 Steps to switch to the Wi-Fi configuration page
For the description of the Wi-Fi settings, please refer to section “4.1.1 Wi-Fi
Communication Interface”. After modifying the setting parameters, please remember to click
"Save" button to save the changes, or click the "Cancel" button to discard the configuration
and return to the previous page.
NOTE - The new Wi-Fi settings will take effect immediately after configuration without
1
2
3
4

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restarting the power of the MDC-211-WF.
◆Ethernet Port Setting
Click "Module Setting" → "Ethernet", to read the current Ethernet setting parameters, if
user want to adjust the Ethernet settings, click the "Modify" button to switch to the
configuration page, as shown in Figure 2.7.
Figure 2.7 Steps to switch to the Ethernet configuration page
After modifying the setting parameters, please remember to click "Save" button to save
the changes, or click the "Cancel" button to discard the configuration and return to the
previous page.
NOTE - The new Ethernet settings only take effect after restarting the power of the MDC-
211-WF.
3
4
1
2

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◆Serial Port Setting
Click "Module Setting" → "Serial Port", to read the current RS-232 and RS-485 setting
parameters, if user want to adjust the configurations of Serial Port, click the "Modify" button
to switch to the configuration page, as shown in Figure 2.8.
Figure 2.8 Steps to switch to the Serial Port configuration page
For the description of the Serial Port settings, please refer to section “4.1.2 Serial Port
Communication Interface". After modifying the setting parameters, please remember to click
"Save" button to save the changes, or click the "Cancel" button to discard the configuration
and return to the previous page.
NOTE - The new Serial Port settings will take effect immediately after configuration without
restarting the power of the MDC-211-WF.
2
34
1

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2.4. Set MDC-211-WF as Modbus Master
Each Wi-Fi/RS-232/RS-485 communication interface on MDC-211-WF can be either set
as Modbus Master or Modbus Slave. This section describes how to set the communication
interface as the Modbus Master, and add the Modbus RTU devices to be monitored.
◆Read current Modbus protocol setting values
Click "Module Setting" → "Modbus RTU/TCP", to read the current setting parameters of
the Modbus RTU/TCP protocol for each communication interface, if user want to modify these
configurations, click the "Modify" button to switch to the configuration page, as shown in
Figure 2.9.
Figure 2.9 Steps to switch to the Modbus protocol configuration page
2
1
34

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◆Set the specified communication interface as Modbus Master
Click the "Module Setting" → "Modbus RTU/TCP" → "Wi-Fi/RS-232/RS-485", to select
the to “Modbus Master” in the "Modbus Mode" configuration field. For the description of the
Modbus Communication Interface settings, please refer to section “4.2 Modbus Protocol
Parameter Descriptions".
◆Add the Modbus RTU devices that want to control
Step1 After setting the protocol to Modbus Master (refer to Figure 2.9), click the icon " "
at the bottom of "Modbus Device" to add a Modbus RTU Slave device and give the
module name (up to 12 ASCII characters) and Modbus address (the Slave station
number (1~255) of the Modbus RTU).
Step2 Following the Figure 2.10, click the icon " " at the bottom of Modbus RTU Slave
module to add a Modbus RTU Register, and set the Modbus Function Code, Start
address, Length and Range of the Register.
Figure 2.10 Add Modbus RTU Slave Module/Register window
Step3 After settings, click "OK" for saving the changes. If you want to discard the changes
please click "Cancel" go back to the previous page. If you want to remove the Modbus
register, click the icon " ".