WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 1
DIO User’s Manual
www.icpdas.com
WF-2000 Series
Wi
-
Fi
I/O
Module
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 2
Warranty
All products manufactured by ICP DAS are under warranty regarding
defective materials for a period of one year from the date of delivery to the
original purchaser.
Warning
ICP DAS assumes no liability for damages 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 2016 by ICP DAS. All rights are reserved.
Trademark
The names used for identification only may be registered trademarks
of their respective companies.
Document Revision
Version Date Description of changes
RevB1.0 2016-10-20 First Release for "WF-2000 RevB" series
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 3
Table of Contents
1. Introduction.......................................................................................5
1.1 Wireless connection mode ................................................................. 5
1.2 Features............................................................................................. 5
1.2.1 Features Description ........................................................................ 6
1.3 Specifications..................................................................................... 7
2. Hardware ...........................................................................................9
2.1 Front Panel ........................................................................................ 9
2.1.1 LED Indicator ................................................................................. 10
2.1.2 I/O Connector................................................................................. 10
2.2 Top Panel......................................................................................... 12
2.3 Dimensions ...................................................................................... 13
2.4 Hardware Connection ...................................................................... 14
2.4.1 Power and Serial port connection .................................................. 14
2.4.2 I/O connection ................................................................................ 14
2.5 Jumper Settings ............................................................................... 19
2.5.1 Watchdog Timer Settings ............................................................... 19
2.6 FW / OP Dip-switch.......................................................................... 19
2.6.1 Firmware Update Mode.................................................................. 19
2.6.2 Firmware Operation Mode.............................................................. 22
3. Software...........................................................................................23
3.1 WF IO Utility (RevB1.0 or later)........................................................ 23
3.1.1 Main Screen ................................................................................... 24
3.1.2 Configuration Screen...................................................................... 25
3.1.3 Data Acquisition Screen ................................................................. 28
4. Application Notes............................................................................32
4.1 Hardware Installation ....................................................................... 32
4.2 WF-2000 series Configuration ......................................................... 33
4.2.1 WF-2000 Series Wireless Network Configuration .......................... 33
4.2.2 PC Connection Configuration......................................................... 34
4.2.3 Access I/O data.............................................................................. 36
5. Modbus Applications......................................................................39
5.1 What is Modbus TCP/IP?................................................................. 39
5.2 Protocol Description......................................................................... 39
5.2.1 MBAP............................................................................................. 40
5.2.2 Function Code................................................................................ 40
5.2.3 Data................................................................................................ 41
5.2.4 Response ....................................................................................... 41
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5.2.5 Data Encoding................................................................................ 42
5.3 Address Mapping ............................................................................. 43
5.3.1 WF-2042 I/O Address Mapping...................................................... 43
5.3.2 WF-2051 I/O Address Mapping...................................................... 44
5.3.3 WF-2055 I/O Address Mapping...................................................... 45
5.3.4 WF-2060 I/O Address Mapping...................................................... 46
6. Troubleshooting..............................................................................47
WF-2000 Series DIO
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1. Introduction
The WF-2000 RevB series I/O modules have WLAN connection
complies with the IEEE802.11b/g/n standards. With the popularity of
802.11 network infrastructure, the WF-2000 RevB series I/O modules
make an easy way to incorporate wireless connectivity into monitoring
and control systems. They also support Modbus/TCP and UDP protocol
and the network encryption configuration, which makes perfect integration
to SCADA software and offer easy and safe access for users from anytime
and anywhere.
Figure 1-1: Application architecture for the WF-2000 RevB series
1.1 Wireless connection mode
WF-2000 RevB series support Infrastructure and Limited-AP wireless
connection modes of WLAN.
1.2 Features
• RoHS Design
• Compatible with IEEE 802.11b/g/n standards
• Support Infrastructure and ad Limited-AP modes for wireless networks
• Support WEP, WPA and WPA2 wireless encryption
• Support Modbus/TCP and UDP protocols
• Support DHCP network configuration
• Wide operating temperature range
• Built-in Watchdog
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 6
1.2.1 Features Description
The WF-2000 module offers the most comprehensive configuration to
meet specific application requirements. The following list shows the
features designed to simplify installation, configuration and application.
Compatible with IEEE 802.11b/g/n standards
WF-2000 RevB module complied with IEEE 802.11b/g/n standard
from 2.4~2.5 GHz, and it can be used to provide up to 11 Mbps for IEEE
802.11b, 54 Mbps for IEEE 802.11g and 72 Mbps for IEEE 802.11n to
connect your wireless LAN.
Support infrastructure and Limited-AP modes for wireless networks
Limited-AP mode lets you create a Limited AP network with the
specified SSID to communicate directly with each other without the need
for a wireless access point.
Infrastructure mode is the more common network configuration where
all wireless hosts (clients) connect to the wireless network via a WAP
(Wireless Access Point).
Support WEP, WPA and WPA2 wireless encryption
WEP and WPA are common types of security that are used to protect
wireless networks. When WEP or WPA is turned on, WF-2000 module
uses a special security key combination to allow only devices that know
this key to connect to its wireless network. This applies to laptops, smart
device, or any other wireless device.
Support Modbus/TCP and UDP protocols
The Modbus/TCP and UDP slave function on the WF-2000 module
can be used to provide data to remote HMI/SCADA software built with
Modbus/TCP driver. ICP DAS also provides NAPOPC_ST DA Server for
Modbus/TCP to integrate WF-2000 I/O series real-time data value with
OPC client enabled software.
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 7
Built-in Multi-function I/O
Various I/O components are mixed with multiple channels in a single
module, which provides the most cost effective I/O usage and enhances
performance of the I/O operations.
Built-in Watchdog
Module Watchdog is a built-in hardware circuit that monitors the
operating status of the module and will reset the module if a failure occurs
in the hardware or the software.
1.3 Specifications
Table 1-1: System Specifications
Modules WF-2042 WF-2051 WF-2055 WF-2060
Wi-Fi Interface
Antenna 5 dBi (Omni-Directional)
Output Power 14 dBm @ 11Mbps
Receive Sensitivity -93 dBm @ 11Mbps
Standard Supported IEEE 802.11b/g/n
Wireless Mode
Infrastructure & Limited AP
Encryption WEP, WPA and WPA2
UART Interface
Connector 5-pin screw terminal connector(TxD, RxD, GND)
COM1 RS-232
Baud Rate (bps) 115200
Power
Input Voltage Range 10V ~ 30V
Power Consumption 1.5W 1.2W 1.9W 1.6W
Mechanism
Installation DIN-Rail
Dimensions (W x L x H) 33mm x 106mm x 120mm
Environment
Operating Temperature -25 ~ +75℃ ℃
Storage Temperature -30℃ ~ +80℃
Humidity 10% ~ 90%
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 8
Table 1-2: WF-2000 I/O Specification
Modules WF-2042 WF-2051 WF-2055 WF-2060
Digital Input
Channels 16 8 6
Input Type Dry Contact: Source / Wet Contact: Sink, Source
Dry Contact Level
Off Voltage Level: Open
On Voltage Level: Close to GND
Wet Contact Level
Off Voltage Level: +4V max
On Voltage Level: +10 V ~ +50 V
Channels 8 6
Max. Counts 32-bit (4294967295)
Counters
Max. Input
Frequency
8 KHz (High Speed)
100 HZ (Low Speed)
Photo-Isolation
-
3750 VDC
Digital Output
Channels 16, Sink(NPN)
8, Sink(NPN)
Output Voltage +3.5 ~ +50 V
+3.5 ~ +50 V
Output Current 700mA/ch 700mA/ch
Intra-module Isolation
(Field to Logic)
3750 VDC 3750 VDC
Overvoltage Protection 60 VDC
-
60 VDC
-
Relay Output
Channels 6
Output Type
Form A
(SPST-NO)
5A 250VAC
Contact Rating (Resistive Load)
5A 30VDC
Operate Time 10ms (max.)
Release Time 5ms (max.)
Mechanical
2 × 107 ops.
Endurance
Electrical
-
105 ops.
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 9
2. Hardware
2.1 Front Panel
The WF-2000 DIO modules front panel contains the antenna, I/O
connectors and LEDs.
Figure 2-1: Front Panel of the WF-2000 DIO modules
RP SMA
Connector
I/O Connector
System Status
Signal strength
I/O Status
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 10
2.1.1 LED Indicator
Table 2-1: System Status Indicator
System Status Indicator
LED Module Status LED Status
Wi-Fi communication error Blink per 100 ms
Wi-Fi associate error Every 1 second flashes twice per 100 ms
Wi-Fi unable to connect error Blink per 1000 ms
Wi-Fi network configurations error
Every 1 second flashes three times per
100 ms
PWR
Power failure Off
Data transmission Blink
Wi-Fi
Bus Idle Off
Table 2-2: Signal Strength LED Indicator
Signal Strength LED Indicator
LED Status Signal strength
High
Medium
Low
Bad or No Signal
2.1.2 I/O Connector
2.1.2.1 WF-2042
Figure 2-2: I/O Connector of WF-2042
WF-2000 Series DIO
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2.1.2.2 WF-2051
Figure 2-3: I/O Connector of WF-2051
2.1.2.3 WF-2055
Figure 2-4: I/O Connector of WF-2055
2.1.2.4 WF-2060
Figure 2-5: I/O Connector of WF-2060
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 12
2.2 Top Panel
The WF-2000 top panel contains the Power/Signal connector and
operating mode Selector switch.
Figure 2-6: Top Panel of the WF-2000
Operating Mode Selector Switch
FW mode: Firmware update mode
Move the switch to the OP position after the upgrade is complete.
OP mode: Firmware operation mode
In the WF-2000, the switch is always in the OP position. Only when updating the WF-
2000 firmware, the switch can be moved from the OP position to the FW position.
Table 2-3: Power/Signal Connector
Power/Signal connector
Pin Assignment Description
F.G Frame Ground
+Vs +10 ~ +30 VDC
GND Power / RS-232 GND
RxD RS-232 RxD
TxD RS-232 TxD
Operating Mode
Selector Switch
Power/RS-232
Connector
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 13
2.3 Dimensions
The diagrams below provide the dimensions of the WF-2000 to use in
defining your enclosure specifications. All dimensions are in millimeters.
Figure 2-7: Front / Left Side dimension of the WF-2000
Figure 2-8: Top / Bottom dimension of the WF-2000
WF-2000 Series DIO
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2.4 Hardware Connection
2.4.1 Power and Serial port connection
The following figures describe the Power and the COM port to a serial
device via serial network.
Figure 2-9: Power and Serial port wire connection
2.4.2 I/O connection
2.4.2.1 WF-2042
Figure 2-10: DO wire connection of WF-2042
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 15
2.4.2.2 WF-2051
Figure 2-11: DI Dry contact wire connection of WF-2051
Figure 2-12: DI Wet contact wire connection of WF-2051
WF-2000 Series DIO
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2.4.2.3 WF-2055
Figure 2-13: DI Dry contact wire connection of WF-2055
Figure 2-14: DI Wet contact wire connection of WF-2055
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 17
Figure 2-15: DO wire connection of WF-2055
2.4.2.4 WF-2060 I/O Wire Connection
Figure 2-16: DI Dry contact wire connection of WF-2060
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 18
Figure 2-17: DI Wet contact wire connection of WF-2060
Figure 2-18: DO wire connection of WF-2060
WF-2000 Series DIO
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2.5 Jumper Settings
2.5.1 Watchdog Timer Settings
A watchdog timer (WDT) is a device that performs a specific
operation after a certain period of time if something goes wrong and the
system does not recover on its own. A watchdog timer can perform a
warm boot(restarting the system) after a certain number of milliseconds.
The WF-2000 series module supplies a jumper for users to active the
watchdog timer or not. If users want to use this WDT, can open the WF2000 cover and use the Jumper to activate the WDT built in the module,
as the Figure 2-13. Note that the default setting is active.
Table 2-4: WDT Jumper Position
Module Jumper Number
WF-2042
WF-2051
WF-2055
WF-2060
JP1
Enable (default) Disable
Figure 2-19: Watchdog timer Jumper Position
2.6 FW / OP Dip-switch
On the top of the WF-2000 series module, there is a dip-switch used
for firmware operation or firmware update of the module. The following
steps show how to use this dip-switch.
2.6.1 Firmware Update Mode
Please set the dip-switch to the “FW” position as Figure 2-7, and then
the WF-2000 series will work in the “Firmware Update Mode” after reset
the power of the module. In this mode, users can update the firmware of
the WF-2000 module from computer’s RS-232 port via CA-0910 cable
shown as Figure 2-22.
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 20
Figure 2-20: FW Position of Dip-Switch
Figure 2-21: CA-0910 Cable
Figure 2-22: Downloads cable connection
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 21
Users just need to execute “Firmware_Update_Tool.exe” and follow
the below steps to complete the firmware updating process.
[1] Choose “COM” interface and “COM Port”.
[2] Click “Browser” button to choose firmware file. (e.g. WF20xx.fw)
[3] Click “Firmware Update” button to start firmware updating process.
The result will be shown in “Firmware Update” field.
Figure 2-23: WF-2000 firmware update process
The WF-2000 firmware can be downloaded from
ftp://ftp.icpdas.com/pub/cd/usbcd/napdos/wifi/io/wf-20xx/firmware
The Firmware_Update_Tool program can be downloaded from
ftp://ftp.icpdas.com/pub/cd/usbcd/napdos/wifi/io/wf20xx/software/tool/
2
3
4
6
5
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 22
2.6.2 Firmware Operation Mode
In the operation mode, users need to set the dip-switch to the “OP”
position as Figure 2-24 and reset the power, and the WF-2000 can run in
the operation mode. In this mode, user can use the WF-2000 series with a
computer or with another WF-2000 series module for wireless connection.
Figure 2-24: OP Position of Dip-Switch
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 23
3. Software
The WF IO Utility (RevB) provides a simple way to test and acquire
data easily and instantly for all ICP DAS WF-2000 RevB series I/O
modules without programming. WF IO Utility (RevB) can be used to
configure the wireless network interface, establish a TCP connection, I/O
control and I/O monitoring of WF-2000 RevB series I/O modules.
WF IO Utility (RevB1.0 or later) is a Microsoft Windows application
that compatibles with Microsoft Windows XP, Vista and 7 (.NET
framework 4.0 is required). You can download this program from:
ftp://ftp.icpdas.com/pub/cd/usbcd/napdos/wifi/wf-2051/software/utility/
The WF IO Utility (RevB) is designed for "WF-2000 RevB" series only,
not for "WF-2000" series (without "RevB" mark). Make sure there is a
"RevB" mark after the model name on the left cover.
The "WF-2000 RevB" and "WF-2000" series are using different Wi-Fi
module, so the Utility are not compatible with each other.
3.1 WF IO Utility (RevB1.0 or later)
The following is the main screens provided by WF IO Utility, this utility
tool can be thought as a useful tool for I/O control and monitoring on the
WF-2000 RevB series. It supplies several functions, such as UDP search,
module connection and Wi-Fi configuration setting, etc.
To access the ICP DAS WF-2000 RevB I/O module user can double
click the module listed in "Device List", and then you will see the I/O page
come out. In the I/O page, it is used to access I/O data and configure
parameters.
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 24
3.1.1 Main Screen
Figure 3-1: WF IO Utility (RevB1.0 or later) main screen
Menu Function:
[1] File
Exit
Press this button to exit WF IO Utility.
[2] Device
ConnectionSearch
This function can search all of WF-2000 devices that support
UDP search communication.
ConfigurationNetwork
This function can enter the basic wireless network
configuration interface, as shown in Figure 3-2.
ConfigurationPair Connection
This function can enter the basic Pair Connection configuration
interface, as shown in Figure 3-5.
[3] Search List
Search list provides each item that scans from UDP and display
the related information about the device, includes host name, alias
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 25
name, IP address, Mask, Gateway, MAC address, Modbus Net ID
and its DHCP state.
3.1.2 Configuration Screen
Figure 3-2: WF IO Utility (RevB1.0 or later) configuration screen
[1] Network
Net ID
The Unit Identifier in Modbus TCP/IP application data unit.
(Range:1~247, Default:1)
DHCP Enable
If a DHCP server is present on the network, the WF-2000 will
automatically obtain the network settings from the DHCP
server when the DHCP function is enabled.
(Limited AP mode don't support DHCP configuration)
IP Address
WF-2000 IP setting (Default:192.168.255.1)
Subnet Mask
WF-2000 Net Mask setting (Default: 255.255.0.0)
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 26
Gateway
WF-2000 Gateway setting (Default: 192.168.255.254)
MAC Address
Display WF-2000 MAC Address
DHCP Server Enable
This function is used to start/stop the DHCP server, prior to
starting the server, the adapter should be configured with a valid
static IP address, both Start IP address and Gateway should be
same and created or configure to create a limited AP network
Start IP Addr.
This DHCP server can support maximum 8 client connections
with server IP as the statically configured IP address and client IP
address starts from the next IP address of the configured static IP
address
[2] Wi-Fi
SSID Auto Search
Auto search the broadcast SSID in the air, and list SSID
names in the drop-down menu.
(It must establish a Wi-Fi connection first, and communicate
with Wi-Fi Interface)
Figure 3-3: Auto search SSID list
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 27
Wi-Fi Configuration
Table 3-1: Infrastructure Mode
Wi-Fi Mode
Infrastructure ： Use the wireless access point way for connection and
transmission. (Must have Wi-Fi AP)
SSID
Service Set Identifier: Connected devices must be with the same SSID, SSID
length must not exceed 20 characters.
Wireless CH
0~11：Wi-Fi transmission channel setting, connected devices must with the
same channel. (In Infrastructure mode, the Wireless channel can be
automatically selected)
Encryption
NONE / WEP(Open) / WEP(Shared) / WPA-PSK / WPA2-PSK: Encryption
of Wi-Fi, connected devices must with the same encryption.
Wireless Key
Key of Encryption, connected devices must with the same Key.
WEP(Open) ：Key length must be 10 characters.
WEP(Shared)：Key length must be 26 characters.
WPA-PSK ：Key length must between 8~63 characters.
WPA2-PSK ：Key length must between 8~63 characters.
Characters of key should be in range of: [0 ~ 9] or [A ~ F] or [a ~ f].
Table 3-2: Limited-AP Mode
Wi-Fi Mode
Limited-AP：Limited-AP mode lets WF-2000 create a Limited AP network
with the specified SSID to communicate directly with each other.
SSID
Service Set Identifier: Connected devices must be with the same SSID, SSID
length must not exceed 20 characters.
WLCH
1~11：Wi-Fi transmission channel setting, connected devices must with the
same channel.
Encryption
NONE / WEP(Open) / WEP(Shared) / WPA-PSK / WPA2-PSK: Encryption
of Wi-Fi, connected devices must with the same encryption.
Wireless Key
Key of Encryption, connected devices must with the same Key.
WEP(Open) ：Key length must be 10 characters.
WEP(Shared)：Key length must be 26 characters.
WPA-PSK ：Key length must between 8~63 characters.
WPA2-PSK ：Key length must between 8~63 characters.
Characters of key should be in range of: [0 ~ 9] or [A ~ F] or [a ~ f].
[3] General
F/W Version
Display the firmware version of the WF-2000
Date created
Display the date created of the WF-2000
WF-2000 Series DIO
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Auto Disconnect
Once the connection is established, if there is no data
exchange within 60 sec the socket will be closed automatically
when the this function is enabled
Communication Net ID
Modbus Net ID of WF-2000 module
Parameter Transmission Interface
The parameter transmission interface, that provides Wi-Fi and
RS-232 interface for connection.
Write Parameter
It allows users to upload the parameters to WF-2000 series
Read Parameter
It allows users to download the parameters form WF-2000
series.
3.1.3 Data Acquisition Screen
In the I/O page of the DI and DO, the real-time value and module
configuration can be read or written in this page. The detail of all items in
this form will be introduced in this section.
Figure 3-4: WF I/O Utility (RevB1.0 or later) DI/DO Data Monitor screen
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 29
Digital Input Monitor Region
The digital input value can be read in this region.
Counter Monitor Region
The counter value can be read or reset in this region.
Digital Output Monitor Region
The digital output value can be read and write in this region.
Power On Value of DO
The power on value of DO can be Set and Get in this region. It
is loaded into the DO under 3 conditions: power on, reset by
Module Watchdog, reset by reset command.
Enable: Enabled or disable this function.
Set Value: Set the current output status as Power On Value.
Get Value: Get the current configuration of Power On Value.
Safe Value of DO
The safe value of DO can be Set and Get in this region. When
the communication timeout occurs, the "Safe Value" is loaded
into the DO.
Enable: Enabled or disable this function.
Set Value: Set the current output status as Safe Value.
Get Value: Get the current configuration of Safe Value.
Active Time (ms): This function is active when the
communication timeout reach this setting.
Polling Interval
This value is the period to poll data to the WF-2000 I/O module.
Note: The valid value is 100 ~ 5000 ms.
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 30
RSSI
This area will display the signal strength information by RSSI
value and LED indicator when press the "Get" button.
Table 3-3: Signal Strength Information Display Table
Signal Strength LED Indicator
LED Status RSSI value Signal strength
1 ~ 40 High
41 ~ 60 Medium
61 ~ 80 Low
0 Bad or No Signal
System
This area will display information for the system connection.
Pair Connection
This pair connection function is a particular feature of WF2000 that can enable a pair of DI-to-DO via Modbus/TCP. With
pair connection function enabled, WF-2000 modules can poll
the status of remote input devices using the Modbus/TCP
protocol and then continuously write to its output channels in
the background.
Figure 3-5:
Pair connection configuration screen
Enable I/O Pair Connection: Enable/Disable I/O pair connection.
Remote Net ID: Modbus Net ID of remote device.
Remote IP Address
: IP address of remote input device.
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 31
Communication Timeout (sec): The period of which the WF-2000 series is
waiting for a response from the remote DI device.
Local DO Base Address: DO base address of local DO register will be mapped
to remote DI device.
Remote DI Base Address: DI base address of Remote DI device that will be
mapped to local DO register.
I/O Count Number: I/O count mapped from the base address.
Scan Time (ms): The frequency with the remote input device will be polled.
WF-2000 Series DIO
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4. Application Notes
Users can use a computer to communicate with the WF-2000 devices
in the application. It can complete the purpose of I/O control to wireless
network by this way.
Figure 4-1: WF-2051 + Laptop application architecture
4.1 Hardware Installation
Before use, associated hardware configuration, the steps described as
follows：
Step 1: Checking the WF-2000 series firmware operation mode
It needs to set the DIP switch to the "OP" position (operating mode),
as resetting the power, WF-2000 series will be in the operation mode.
Step 2: Serial port connection
WF-2000 series supports RS-232 serial communication. The circuit
configuration is as shown in Figure 2-9.
If you do not need parameter setting, this step can be omitted.
Step 3: Power connection
Connect the power supply to WF-2000 series' power terminator, as
shown in Figure 2-9.
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 33
4.2 WF-2000 series Configuration
4.2.1 WF-2000 Series Wireless Network Configuration
Figure 4-3: Configuration Interface
01、Net ID : The Unit Identifier in Modbus TCP/IP application data
unit. This case is set as "1" in Figure 4-3.
02、IP Address : Set the local WF-2000 series' IP. Here set to
"192.168.255.1".
03、Subnet Mask : Net Mask settings. Here set to "255.255.0.0".
04、Gateway : Gateway settings. Here set to "192.168.255.254".
05、DHCP Server Enable : Enable DHCP Server.
06、Start IP Addr. : The client IP address starts from the configured
static IP address. Here set to "192.168.255.100".
07、Wi-Fi Mode : Wireless network connection mode settings. Here
set to "Limited AP" mode. (If select the "Limited AP" mode, the
"DHCP Server" function is enabled)
08、SSID : Service set identifier. Here set to "WF-20xx".
09、Encryption : Encryption mode settings. Here set "NONE" (without
encryption).
10、Wireless Key : Wireless encryption Key. Here does not have the
setting.
11、Wireless CH : Wi-Fi connection channel settings. Here set to "2".
12、Upload parameters : After completing the settings above, select
the "RS-232" interface, communication "Net ID" and "COM Num".
Press "Write Parameter" button to upload the parameters.
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 34
4.2.2 PC Connection Configuration
01、TCP/IP Setting :
a. Open Network connections and entry the properties setting of
wireless network connections.
Figure 4-4: Properties setting of wireless network connections
b. Select the Internet Protocol (TCP/IP) and press the "Properties"
button.
Figure 4-5: Properties setting of Internet Protocol (TCP/IP)
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c. Configuring your computer to "Obtain an IP address
automatically" allows WF-2000 module to assign a dynamic
IP address to it.
Once the wireless network connection is successful, the
computer will obtain an IP address as "192.168.255.100".
Figure 4-6: IP address setting interface
02、Wireless network connection :
a. View available wireless networks and you can see the "WF-
20xx" wireless network in the list.
b. Select the "WF-20xx" and press the "Connect" button.
Figure 4-7: Wireless network connection
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User’s Manual (RevB1.0, Oct./2016) ------------- 36
c. Press the "Connect Anyway" button for the next step.
Figure 4-8: Connection confirm interface
d. After waiting for a while, there will appear connection success
screen.
Figure 4-9: Connection successful interface
4.2.3 Access I/O data
01、Connection with WF I/O utility (RevB1.0 or later)
a. Open WF I/O utility and click the "Search" button, choose the
network interface that connect with the WF-2000 device,
search list will provide each item that scan from UDP Port.
Figure 4-10 Choose Network Interface
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User’s Manual (RevB1.0, Oct./2016) ------------- 37
b. To access the WF-2000 I/O module user can double click the
module listed in "Device List".
Figure 4-11: WF-2000 search list
c. Then you will see the I/O page come out. In the I/O page, it is
used to access I/O data and configure parameters.
Figure 4-12: I/O page interface
02、Connection with Modbus TCP utility
a. Open Modbus TCP utility and key in the IP address as
"192.168.255.1", Port as "502". Finally, click the "Connect"
button.
b. If the network settings are correct, this will immediately
establish a connection.
c. Use the function code "0x02", and set the Reference Number
as "0x00", Bit Count as "0x10" to get the 16 CHs DI value.
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User’s Manual (RevB1.0, Oct./2016) ------------- 38
Figure 4-13: Digital Input reading screen
d. Use the function code "0x04", and set the Reference Number
as "0x32", Word Count as "0x10" to get the 8 CHs Counter
value (4 bytes each counter).
Figure 4-14: Counter reading screen
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User’s Manual (RevB1.0, Oct./2016) ------------- 39
5. Modbus Applications
The WF-2000 is a Modbus device that allows you to access
terminals data via Wi-Fi and communicates using a master-slave
technique in which only one device (the master) can initiate transactions
(called queries). The other devices (slaves) respond by supplying the
requested data to the master, or by taking the action requested in the
query.
Most SCADA Supervisor Control And Data Acquisition and HMI
software can easily integrate serial devices via the Modbus protocol,
such as Citect, ICONICS, iFIX, InduSoft, Intouch, Entivity Studio, Entivity
Live, Entivity VLC, Trace Mode, Wizcon, Wonderware, etc.
5.1 What is Modbus TCP/IP?
Modbus is a communication protocol developed by Modicon in 1979.
Different versions of Modbus used today include Modbus RTU
(based on serial communication like RS485 and RS232), Modbus ASCII
and Modbus TCP, which is the Modbus RTU protocol embedded into
TCP packets.
Modbus TCP is an internet protocol. The protocol embeds a Modbus
frame into a TCP frame so that a connection oriented approach is
obtained thereby making it reliable. The master query’s the slave and the
slave responds with the reply. The protocol is open and hence highly
scalable.
5.2 Protocol Description
The Modbus protocol defines a simple protocol data unit
independent of the underlying communication layers. The mapping of
Modbus protocol on network can introduce some additional fields on the
application data unit.
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Modbus/TCP Application Data Unit
Transaction ID
(2 bytes)
Protocol ID
(2 bytes)
Length
(2 bytes)
Unit ID
(1 bytes)
FCode
(1 bytes)
Data
(0 to 252 bytes)
MBAP Header Protocol Data Unit
Figure 5-1: Modbus/TCP Application Data Unit
5.2.1 MBAP
The Modbus/TCP extension includes 7 additional bytes to the
original Modbus protocol, which allows for transport over the TCP/IP
layers.
A dedicated header is used on TCP/IP to identify the Modbus
Application Data Unit. It is called the MBAP Header (MODBUS
Application Protocol Header). The MBAP Header consists of 7 bytes of
information:
Table 5-1: MODBUS Application Protocol Header
Fields
Length Description
Transaction
Identifier
2 bytes
Identification of Request/Response transaction –
Copied from request to response
Protocol Identifier 2 bytes 0 = Modbus protocol
Length 2 bytes
Number of following bytes - Includes the Unit
Identifier
Unit Identifier 1 byte Identification of remote slave
5.2.2 Function Code
The function code field of a Modbus data unit is coded in one byte.
Valid codes are in the range of 1 ... 255 decimal (the range 128 - 255 is
reserved and used or exception responses). When a Modbus request is
sent from a Modbus Client to a Server device the function code field tells
the Server what kind of action to perform.
The Modbus/TCP feature of WF-2000 series module supports 7
function codes, which allows the reading and writing of data contents of
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 41
registers.
Table 5-2: Supports Function Codes of WF-2000 series
Function Code Descriptions
01 (0x01) Read Coil Status
02 (0x02) Read Input Status
03 (0x03) Read Holding Registers
04 (0x04) Read Input Registers
05 (0x05) Force Single Coil
15 (0x0F) Force Multiple Coils
16 (0x10) Preset Multiple Registers
Any other function code request will be returned with an error
response indicating the function code is not supported, as well as a
request for too much data or data at a register address that not present.
5.2.3 Data
The data field of Modbus request sent from a client to server devices
contains additional information that the server uses to take the action
defined by the function code. This can include items like discrete and
register addresses, the quantity of items to be handled, and the count of
actual data bytes in the field.
The data field may be nonexistent (of zero length) in certain kinds of
requests; in this case the server does not require any additional
information. The function code alone specifies the action.
5.2.4 Response
If no error occurs related to the Modbus function requested in a
properly received Modbus PDU (Protocol Data Unit) the data field of a
Modbus response from a server to a client contains the data requested.
If an error related to the Modbus function requested occurs, the field
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 42
contains an exception code that the server application can use to
determine the next action to be taken.
For example a client can read the ON/OFF states of a group of
digital input or output or it can read/write the data contents of a group of
registers.
When the server responds to the client, it uses the function code field
to indicate either a normal response or that some kind of error occurred
(called an exception response). For a normal response, the server
simply echoes to the request the original function code.
For an exception response, the server returns a code that is
equivalent to the original function code from the request PDU with its
most significant bit set to logic 1.
5.2.5 Data Encoding
Modbus uses a “big-endian” representation for address and data
items. This means that when a numerical quantity larger than single byte
is transmitted, the most significant byte (MSB, also called the high-order
byte) is send first. The following sub-topics describe the different byte of
encoding and show how the data is encoded as it is within the
Modbus/TCP packet.
5.2.5.1 Binary
A binary item is represented as a single bit within a data word. All
binary is packed into 16-bits data words, which are accessed using
function code 01 and 02. Therefore, a single register contains 16 bits of
binary data, each having a specific meaning.
Table 5-3: A single register contains 16 bits of binary data
Value 1st 2nd
0xAA55
(1010101001010101)
0xAA
(10101010)
0x55
(01010101)
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5.2.5.2 16-bits Word
A 16-bits word item is transmitted with the most significant byte first.
Function code 03 and 04 read 16-bits items at a time; therefore, each of
these data items will fit within one register that is read.
Table 5-4: A 16-bits word item
Value 1st 2nd
0x1234 0x12 0x34
5.3 Address Mapping
5.3.1 WF-2042 I/O Address Mapping
Table 5-5: (0xxxx) DO address
Begin Address
Points Descriptions Range Access Type
00001 1~16 Digital Output 0=OFF, 1=ON R/W
Table 5-6: (4xxxx) AO address
Begin Address
Points Descriptions Range Access Type
40248 1 Reset System
1= Reset System
247= Restore to
Factory Default
Settings
W
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User’s Manual (RevB1.0, Oct./2016) ------------- 44
5.3.2 WF-2051 I/O Address Mapping
Table 5-7: (0xxxx) DO address
Begin Address
Points Descriptions Range Access Type
00011 1~8
Clear
High Speed
Counter
1=Clear W
00021 1~8
Clear
Low Speed
Counter
1=Clear W
Table 5-8: (1xxxx) DI address
Begin Address
Points Descriptions Range Access Type
10001 1~16 Digital Input 0=OFF, 1=ON R
Table 5-9: (3xxxx) AI address
Begin Address
Points Descriptions Range Access Type
30051
1~16
(2 points/ Each
Channel)
High Speed
Counter
0~4294967295 R
30071
1~16
(2 points/ Each
Channel)
Low Speed
Counter
0~4294967295 R
Table 5-10: (4xxxx) AO address
Begin Address
Points Descriptions Range Access Type
40248 1 Reset System
1= Reset System
247= Restore to
Factory Default
Settings
W
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User’s Manual (RevB1.0, Oct./2016) ------------- 45
5.3.3 WF-2055 I/O Address Mapping
Table 5-11: (0xxxx) DO address
Begin Address
Points Descriptions Range Access Type
00001 1~8 Digital Output 0=OFF, 1=ON R/W
00011 1~8
Clear
High Speed
Counter
1=Clear W
00021 1~8
Clear
Low Speed
Counter
1=Clear W
Table 5-12: (1xxxx) DI address
Begin Address
Points Descriptions Range Access Type
10001 1~8 Digital Input 0=OFF, 1=ON R
Table 5-13: (3xxxx) AI address
Begin Address
Points Descriptions Range Access Type
30051
1~16
(2 points/ Each
Channel)
High Speed
Counter
0~4294967295 R
30071
1~16
(2 points/ Each
Channel)
Low Speed
Counter
0~4294967295 R
Table 5-14: (4xxxx) AO address
Begin Address
Points Descriptions Range Access Type
40248 1 Reset System
1= Reset System
247= Restore to
Factory Default
Settings
W
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User’s Manual (RevB1.0, Oct./2016) ------------- 46
5.3.4 WF-2060 I/O Address Mapping
Table 5-15: (0xxxx) DO address
Begin Address
Points Descriptions Range Access Type
00001 1~6 Digital Output 0=OFF, 1=ON R/W
00011 1~6
Clear
High Speed
Counter
1=Clear W
00021 1~6
Clear
Low Speed
Counter
1=Clear W
Table 5-16: (1xxxx) DI address
Begin Address
Points Descriptions Range Access Type
10001 1~6 Digital Input 0=OFF, 1=ON R
Table 5-17: (3xxxx) AI address
Begin Address
Points Descriptions Range Access Type
30051
1~12
(2 points/ Each
Channel)
High Speed
Counter
0~4294967295 R
30071
1~12
(2 points/ Each
Channel)
Low Speed
Counter
0~4294967295 R
Table 5-18: (4xxxx) AO address
Begin Address
Points Descriptions Range Access Type
40248 1 Reset System
1= Reset System
247= Restore to
Factory Default
Settings
W
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 47
6. Troubleshooting
Item Problem Description Solution
1
Power Failure
(PWR LED Off)
1. Please return to the ICP DAS for inspection and
repair
2
WLAN connection can not
be established
1. Make sure that the service set identifier device
(SSID) settings are the same.
2. Make sure Wi-Fi transmission Channel settings
are the same.
3. Make sure encryption is set, encryption keys are
the same way
4. Make sure antenna is connected
5. Please confirm whether there are barriers on the
scene. That could result in poor signal quality.
3
TCP connection can not be
established
1. Make sure WLAN connection is established
successfully
2. Make sure the network configuration is good
(TCP / IP Port, Local IP, Net Mask)
4
How to restore factory
default
1. Power on the WF-2000 series I/O module
2. Change the Dip-Switch position of the WF-2000
series and to complete the following steps in 5
seconds.
Step1. From “OP” to “FW” position.
Step2. From “FW” to “OP” position.
Step3. From “OP” to “FW” position.
Step4. From “FW” to “OP” position.
3. When the correct implementation of the above
steps, the Signal Strength LEDs and PWR/Wi-Fi
LEDS of the WF-2000 series should be turn on,
and that should be turn off after 500 ms later.
4. Reset the power the WF-2000 series would back
to factory defaults.
Step1
Step2
Step3
Step4
WF-2000 Series DIO
User’s Manual (RevB1.0, Oct./2016) ------------- 48
Item Problem Description Solution
5
Cannot execute WF
Utility(RevB1.0 or later) with
the message like the
following
Figure 6-1
Because the ICP DAS WF Utility(RevB1.0 or later)
requires .NET Framework v4.0,this program will
automatically detect the .NET Framework v4.0
installed as well or not. Users can install .NET
Framework v4.0 in the following website.
Microsoft .NET Framework 4 (Web Installer)
http://www.microsoft.com/en-
us/download/details.aspx?id=17851
Microsoft .NET Framework 4 (Standalone Installer)
http://www.microsoft.com/en-
us/download/details.aspx?id=17718
Figure 6-1:
.NET Framework Initialization Error
Technical Support
If you have problems about using the WF-2000 series I/O module, please
contact ICP DAS Product Support.
Email: service@icpdas.com
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