ICPDAS WF-2017, WF-2026, WF-2019 User Manual

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 1

AIO User’s Manual

www.icpdas.com

WF-2000 Series

Wi

-

Fi

I/O

Module

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 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 2013 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

1.0 2013-11-27 First Release Revision

1.1 2014-03-19 Modify WF-2019 Current Input Wiring

1.2 2014-05-12 Add WF-2026 Product Description

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 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 .........................................................................................11

2.1 Front Panel .......................................................................................11

2.1.1 LED Indicator ................................................................................. 12

2.1.2 I/O Connector................................................................................. 12

2.2 Top Panel......................................................................................... 14

2.3 Dimensions ...................................................................................... 15

2.4 Hardware Connection ...................................................................... 17

2.4.1 Power and Serial port connection .................................................. 17

2.4.2 I/O connection ................................................................................ 18

2.5 Jumper Settings ............................................................................... 20

2.5.1 Watchdog Timer Settings ............................................................... 20

2.5.2 AI Settings...................................................................................... 20

2.6 FW / OP Dip-switch.......................................................................... 21

2.6.1 Firmware Update Mode.................................................................. 21

2.6.2 Firmware Operation Mode.............................................................. 23

3. Software...........................................................................................25

3.1 WF-2000 I/O Utility (v2.0 or later) .................................................... 25

3.1.1 Main Screen ................................................................................... 25

3.1.2 Configuration Screen...................................................................... 26

3.1.3 Analog Input Screen....................................................................... 30

4. Application Notes............................................................................36

4.1 Hardware Installation ....................................................................... 36

4.2 WF-2000 series Configuration ......................................................... 37

4.2.1 WF-2000 Series Wireless Network Configuration .......................... 37

4.2.2 PC Connection Configuration......................................................... 38

4.2.3 Access I/O data.............................................................................. 40

5. Modbus Applications......................................................................44

5.1 What is Modbus TCP/IP?................................................................. 44

5.2 Protocol Description......................................................................... 44

5.2.1 MBAP............................................................................................. 45

5.2.2 Function Code................................................................................ 45

5.2.3 Data................................................................................................ 46

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 4

5.2.4 Response ....................................................................................... 46

5.2.5 Data Encoding................................................................................ 47

5.3 Address Mapping ............................................................................. 48

5.3.1 WF-2017 I/O Address Mapping...................................................... 48

5.3.2 WF-2019 I/O Address Mapping...................................................... 48

5.3.3 WF-2026 I/O Address Mapping...................................................... 49

6. Troubleshooting..............................................................................50

Appendix A. ...........................................................................................52

A.1 Analog Input Type and Data Format Table .................................................... 52

A.2 Analog Output Type and Data Format Table.................................................. 54

A.3 CJC (cold junction compensation) Definition................................................. 55

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 5

1. Introduction

The WF-2000 series I/O modules have WLAN connection complies
with the IEEE802.11b/g standards. With the popularity of 802.11 network
infrastructure, the WF-2000 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 series

1.1 Wireless connection mode

WF-2000 series support AP and Ad-hoc wireless connection modes
of WLAN.

1.2 Features

• RoHS Design

• Compatible with IEEE 802.11b/g standards

• Support infrastructure and ad hoc 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 AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 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 standards

WF-2000 module complied with IEEE 802.11b/g standard from

2.4~2.5GHz, and it can be used to provide up to 11Mbps for IEEE

802.11b and 54Mbps for 2.4GHz IEEE 802.11g to connect your wireless
LAN.

Support infrastructure and ad hoc modes for wireless networks

Ad hoc mode lets you create a wireless network quickly by allowing
wireless nodes within range (for example, the wireless devices in a room)
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 AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 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-2017 WF-2019 WF-2026

Wi-Fi Interface

Antenna 5 dBi (Omni-Directional)

Output Power 8 dBm @ 11Mbps

Receive Sensitivity -83 dBm @ 11Mbps

Standard Supported IEEE 802.11b/g

Wireless Mode

Infrastructure & Ad-hoc

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 10 ~ 30 VDC

Power Consumption 2.0 W 2.2 W 2.2 W

Mechanism

Installation DIN-Rail

Dimensions (H x W x D)

110mm x 106mm x

33mm

110mm x 95mm x

33mm

110mm x 106mm x

33mm

Environment

Operating Temperature -25 ~ +75℃ ℃

Storage Temperature -30℃ ~ +80℃

Humidity 10% ~ 90%

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 8

Table 1-2 WF-2017 I/O Specification

Modules WF-2017

Analog Input

Channels 8-ch Differential / 16-ch Single-ended(Note), Jumper Selectable

Voltage : ±150 mV, ±500 mV, ±1 V, ±5 V, ±10 V

Input Type

Current : 0 ~ +20 mA, +4 ~ +20 mA, ±20 mA (Jumper Selectable)

Resolution 16 bit

Accuracy ±0.1% FSR

Sampling Rate 10 Hz (Total)

Zero Drift ±20 µV/°C

Span Drift

±25 ppm/℃

Common Mode Rejection 86 dB Min.

Normal Mode Rejection 100 dB

Input Impedance

> 2 MΩ > 1 MΩ

Overvoltage protection

Differential

240 Vrms

Single-ended

150 Vrms

Intra-Module Isolation, Field-to-Logic 3000 VDC

Individual Channel Configuration Yes

Note: Differential mode can be used for voltage input and current input.

Single-Ended mode can be used for voltage input only.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 9

Table 1-3 WF-2019 I/O Specification

Modules WF-2019

Analog Input

Channels 10

Voltage : ±15 mV, ±50 mV, ±100 mV, ±500 mV, ±1 V, ±2.5 V, ±5 V,

±10 V

Current : ±20 mA (External resistor is required)

Input Type

Thermocouple : J, K, T, E, R, S, B, N, C

Resolution 16 bit

Accuracy ±0.1% FSR

Sampling Rate 10 Hz (Total)

Zero Drift ±20 µV/°C

Span Drift

±25 ppm/℃

Common Mode Rejection 86 dB Min.

Normal Mode Rejection 100 dB

Input Impedance Voltage Input: >400 kΩ, Current Input: 125 Ω

Intra-Module Isolation, Field-to-Logic 3000 VDC

Overvoltage protection 240 Vrms

Individual Channel Configuration Yes

Open Wire Detection Yes (Software programmable)

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 10

Table 1-4 WF-2026 I/O Specification

Analog Input

Channels 5

Wiring Differential

Voltage ±150 mVDC, ±500 mVDC, ±1 VDC, ±5 VDC, ±10 VDC

Input Range

Current 0 ~ +20 mA, +4 ~ +20 mA, ±20 mA (Jumper Selectable)

Resolution 16 bit

Accuracy ±0.1% FSR

Sampling Rate 10 Hz (Total)

Zero Drift ±20 µV/°C

Span Drift ±25 ppm/°C

Common Mode Rejection 86 dB Min.

Normal Mode Rejection 100 dB

Voltage 2 MΩ

Input Impedance

Current 140 Ω

Common Voltage Protection ±200 V

Overvoltage Protection 240 Vrms

Overcurrent Protection Yes, 50 mA @ 110 VDC

Virtual Channel to Channel Isolation Yes, 400 VDC

Individual Channel Configuration Yes

Analog Output

Channels 2

Voltage +0 ~ +5 VDC, +0 ~ +10 VDC, ±5 VDC, ±10 VDC

Output Range

Current +0 ~ +20 mA, +4 ~ +20 mA (Jumper Selectable)

Resolution 12 bit

Accuracy ±0.1% FSR

Voltage Output Capability 10 V @ 20 mA

Power-on Value Yes, Programmable

Safe Value Yes, Programmable

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 11

2. Hardware

2.1 Front Panel

The WF-2000(AIO) front panel contains the antenna, I/O connectors
and LEDs.

Figure 2-1 Front Panel of the WF-2000(AIO)

RP SMA

Connector

I/O Connector

System Status

Signal strength

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 12

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-2017

Figure 2-2 I/O Connector of WF-2017

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 13

2.1.2.2 WF-2019

Figure 2-3 I/O Connector of WF-2019

Figure 2-4 Pin Assignment of DB-1820

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 14

2.1.2.3 WF-2026

Figure 2-5 I/O Connector of WF-2026

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

Power/RS-232

Connector

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 15

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

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-2017/WF-2026

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 16

Figure 2-8 Front / Left Side dimension of the WF-2019

Figure 2-9 Top / Bottom dimension of the WF-2017/WF-2026

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 17

Figure 2-10 Top / Bottom dimension of the WF-2019

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 2-11 Power and Serial port wire connection

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 18

2.4.2 I/O connection

2.4.2.1 WF-2017

Figure 2-12 AI wire connection of WF-2017

2.4.2.2 WF-2019

Figure 2-13 AI wire connection of WF-2019

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 19

2.4.2.3 WF-2026

Figure 2-14 AIO wire connection of WF-2026

Figure 2-15 DIO wire connection of WF-2026

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 20

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

Mode Jumper Number

WF-2017 JP2
WF-2019 JP1
WF-2026 JP4

Enable (default) Disable

Figure 2-16 Watchdog timer Jumper Position

2.5.2 AI Settings

Table 2-5 WF-2017 AI Input Type/Mode Jumper configuration

Modules

Input Type Jumper Position

Input Mode Jumper Position

Differential

Voltage

Single-ended

WF-2017

Current

Differential

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 21

Table 2-6 WF-2026 Analog Input/Output Type Jumper configuration

Modules

Input Type Jumper Position

Output Type Jumper Position

Voltage

Voltage

WF-2026

Current

Current

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 2-19.

Figure 2-17 FW Position of Dip-Switch

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 22

Figure 2-18 CA-0910 Cable

Figure 2-19 Downloads cable connection

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.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 23

Figure 2-20 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/

2.6.2 Firmware Operation Mode

In the operation mode, users need to set the dip-switch to the “OP”
position as Figure 2-22 and reset the power, and the WF-2000 can run in
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.

1 2

3

4

6

5

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 24

Figure 2-21 OP Position of Dip-Switch

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 25

3. Software

The WF-2000 Utility provides a simple way to test and acquire data
easily and instantly for all ICP DAS WF-2000 series I/O modules without
programming. WF-2000 Utility can be used to configure the wireless
network interface, establish a TCP connection, I/O control and I/O
monitoring of WF-2000 series I/O modules.

WF-2000 I/O Utility (v2.0 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
fromftp://ftp.icpdas.com/pub/cd/usbcd/napdos/wifi/io/wf-

2019/software/utility/

3.1 WF-2000 I/O Utility (v2.0 or later)

The following is the main screens provided by WF-2000 I/O Utility, this
utility tool can be thought as a useful tool for I/O control and monitoring on
the WF-2000 series. It supplies several functions, such as UDP search,
module connection and Wi-Fi configuration setting, etc.

To access the ICP DAS WF-2000 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.

3.1.1 Main Screen

Figure 3-1 WF-2000 I/O Utility (v2.3) main screen

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 26

Menu Function:

[1] File

 Exit

Press this button to exit WF-2000 I/O Utility.

[2] Device

 Search

This function can search all of WF-2000 devices that support
UDP communication.

 Configuration

This function can enter the basic wireless configuration
interface, as shown in Figure 3-2.

[3] Search List

Search list provides each item that scans from UDP and display
the related information about the device, includes host name, alias
name, IP address, Mask, Gateway, MAC address, Modbus Net ID
and its DHCP state.

3.1.2 Configuration Screen

Figure 3-2 WF-2000 I/O Utility (v2.0 or later) configuration screen

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 27

[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.

(Ad Hoc 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: 255.255.255.0)

 Gateway

WF-2000 Gateway setting (Default: 192.168.255.254)

 MAC Address

WF-2000 MAC Address display

[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)

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 28

Figure 3-3 Auto search SSID list

 Wi-Fi Modes

Table 3-1 AP Mode Configuration

Wi-Fi Mode

AP：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 AP mode AUTO mode, the Wireless channel can be
automatically selected)

Encryption

NONE / WEP64 / WEP128 / WPA / WPA2: Encryption of Wi-Fi, connected
devices must with the same encryption.

Wireless Key

Key of Encryption，connected devices must with the same Key.
WEP-64 ：Key length must be 10 characters.
WEP-128：Key length must be 26 characters.
WPA ：Key length must between 8~64 characters.
WPA2 ：Key length must between 8~64 characters.
Characters of key should be in range of: [0 ~ 9] or [A ~ F] or [a ~ f].

Table 3-2 AD-Hoc Configuration

Wi-Fi Mode

Ad-Hoc：Use Ad-Hoc connectivity with another WF-2000 series or Wi-Fi
devices to create AD-hoc wireless network.

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 / WEP64 / WEP128: Wi-Fi Encryption of Wi-Fi, connected devices
must with the same encryption.
Not Support WPA、WPA2 encryption in Ad-Hoc mode。

WLK

Key of Encryption，connected devices must with the same Key.
WEP-64 ：Key length must be 10 characters.
WEP-128：Key length must be 26 characters.
Characters of key should be in range of: [0 ~ 9] or [A ~ F] or [a ~ f].

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 29

[3] General

 F/W Version

Display the firmware version of the WF-2000

 Date created

Display the date created of the WF-2000

 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

 Parameter Transmission Interface

The parameter transmission interface, that provides wireless

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.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 30

3.1.3 Analog Input Screen

In the I/O page of the AI, 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-2017 diagnostic screen

Figure 3-5 WF-2019 diagnostic screen

Data Monitor Region

Configuration Region

Message Region

Data Monitor Region

Configuration Region

Message Region

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 31

Figure 3-6 WF-2026 diagnostic screen

 Configuration Region

All I/O related configurations can be set in this region. This
region is divided into two parts, channel and module related
setting. The channel related setting is in the "Selected
Channel". The rest are module related settings.

 Set All

All AI or AO channels related setting will follow current
selection.

 Type

The WF-2000 series I/O modules provide programmable
input type for analog input/output. Users can set different
type for each analog input/output channel. For more detail
for type of analog /output modules, please refer to
Appendix A.

Data Monitor and

Control Region

Configuration Region

Message Region

Configuration

Region

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 32

 Channel CJC Offset

Setting the CJC offset for the specific channel. The
behavior of the setting is the same as the CJC Offset, but
it only affects specific channel.

Note: The CJC offset can be any in the range of -30.00 to
+100.00 °C.

 Filter Rejection

In order to remove the noise from the power supply, some
analog input modules feature build-in noise filter. Two
filters, 50Hz and 60Hz, are provided to remove noise
generated from power source.

 Wire Detection

Enable / Disable the open-wire detection for thermocouple.

 CJC Enable

Enable / Disable the CJC (Cold-Junction Compensation).

 CJC Offset

Setting the CJC offset value for all AI channels. The offset
value is used to add or subtract the reading value.
Changing of this value will not affect calibration, but will
affect the reading value of temperature type.

Note: The CJC offset can be any in the range of -30.00 to
+100.00 °C.

 Polling Interval

This value is the period to poll data to the WF-2000 I/O
module.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 33

Note: The valid value is 100 ~ 5000ms.

 Show Hex

Convert the I/O value from decimal to hexadecimal.

 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

 Monitor Region

The I/O related data and configurations will be listed here.
Users can select the channel to configure in the “I/O Monitor
Region”. The setting of this selected channel will show in “I/O
configuration region”.

 Message Region

This area will display information for the system connection.

 Control Region

In the controlling region, 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.

 Digital Input Monitor Region

The digital input value can be read in this region.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 34

 Digital Output Monitor and Control 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 disabled 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 disabled 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.

 Analog Output Monitor and Control Region

The analog output value can be read and write in this
region.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 35

 Power On Value of AO

The power on value of AO can be Set and Get in this
region. It is loaded into the AO under 3 conditions: power
on, reset by Module Watchdog, reset by reset command.

 Enable: Select which channel to enable or disable this

function.

 Set Value: Set the current output value as Power on

value.

 Get Value: Get the current configuration of Power on

value.

 Safe Value of AO

The safe value of AO can be Set and Get in this region.
When the communication timeout occurs, the "Safe Value"
is loaded into the AO.

 Enable: Select which channel to enable or disable this

function.

 Set Value: Set the current output value 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.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 36

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-2000 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 2-19.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 37

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 2-5.

4.2 WF-2000 series Configuration

4.2.1 WF-2000 Series Wireless Network Configuration

Figure 4-2 Configuration Interface

01、Net ID : The Unit Identifier in Modbus TCP/IP application data

unit. This case is set as "1" in Figure 4-2.

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. 255.0".

04、Gateway : Gateway settings. Here set to "192.168.255.254".

05、Wi-Fi Mode : Wireless network connection mode settings. Here

set to "Ad-Hoc" mode. (If the mode is "AP" mode, wireless AP
devices is needed.)

06、SSID : Service set identifier. Here set to "WF-20xx".

07、Wireless Key: Wireless encryption Key. Here does not have the

setting.

08、Wireless CH : Wi-Fi connection channel settings. Here set to "2".

09、Encryption : Encryption mode setting. Here set "NONE" (without

encryption).

10、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 AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 38

4.2.2 PC Connection Configuration

01、TCP/IP Setting :

a. Open Network connections and entry the properties setting of

wireless network connections.

Figure 4-3 Properties setting of wireless network connections

b. Select the Internet Protocol (TCP/IP) and press the "Properties"

button.

Figure 4-4 Properties setting of Internet Protocol (TCP/IP)

c. Click the "Use the following IP address" and entry the IP

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 39

address as "192.168.255.10", Subnet mask as "255.255.255.
0". Finally, press "OK" button.

Figure 4-5 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 4-6 Wireless network connection

c. Press the "Connect Anyway" button for the next step.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 40

Figure 4-7 Connection confirm interface

d. After waiting for a while, there will appear connection success

screen.

Figure 4-8 Connection successful interface

4.2.3 Access I/O data

01、Connection with WF-2000 I/O utility (v2.3 or later)

a. Open WF-2000 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 4-9 Choose Network Interface

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 41

b. To access the WF-2000 I/O module user can double click the

module listed in "Device List".

Figure 4-10 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 4-11 I/O page interface(WF-2026)

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.

Figure 4-12 Modbus TCP utility Connection interface

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 42

c. The following Modbus command function codes are available

for WF-2000 series control.

Table 4-1 Modbus request command list

Request

FC1 Read

multiple coils

status (0xxxx) for

DO

FC2 Read

multiple input

discrete (1xxxx)

for DI

FC3 Read

multiple

registers

(4xxxx) for AO

FC4 Read

multiple input

registers

(3xxxx) for AI

FC15 Force

multiple coils

(0xxxx) for DO

FC16 Write

multiple

registers

(4xxxx) for AO

Byte 0 Net ID

Byte 1 FC=0x01 FC=0x02 FC=0x03 FC=0x04 FC=0x0F FC=0x10

Byte 2-3 Reference number

Byte 4-5 Bit count Bit count Word count Word count Bit count Word count

Byte 6 N/A N/A N/A N/A Byte count (B) Byte count (B)

Byte 7-( B+6)

N/A N/A N/A N/A

Data to be

written

Register values

d. Modbus TCP request command examples.

Figure 4-13 Read multiple coils status (0xxxx) for DO

Figure 4-14 Force multiple coils (0xxxx) for DO

Figure 4-15 Read multiple input discretes (1xxxx) for DI

Figure 4-16 Read multiple input registers (3xxxx) for AI

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 43

Figure 4-17 Read multiple registers (4xxxx) for AO

Figure 4-18 Write multiple registers (4xxxx) for AO

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 44

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.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 45

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
registers.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 46

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
contains an exception code that the server application can use to
determine the next action to be taken.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 47

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)

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.

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 48

Table 5-4 A 16-bits word item

Value 1st 2nd

0x1234 0x12 0x34

5.3 Address Mapping

5.3.1 WF-2017 I/O Address Mapping

Table 5-5 (3xxxx) AI address

Begin Address Points Descriptions Range Access Type

30001 1~16 Analog Input

-32768 ~ +32767 (Bipolar)

0 ~ +65535 (Unipolar)

R

30017 1

AI Wire

Selected

0 ~ 1

0 => Differential

1 => Single-Ended

R

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

5.3.2 WF-2019 I/O Address Mapping

Table 5-7 (3xxxx) AI address

Begin Address Points Descriptions Range Access Type

30001 1~10 Analog Input

-32768 ~ +32767 (Bipolar)

0 ~ +65535 (Unipolar)

R

30011 1 CJC data -300 ~ +1000 R

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 49

Table 5-8 (4xxxx) AO address

Begin Address Points Descriptions Range Access Type

40248 1 Reset System

1= Reset System

247= Restore to Factory

Default Settings

W

5.3.3 WF-2026 I/O Address Mapping

Table 5-9 (3xxxx) AI address

Begin Address Points Descriptions Range Access Type

30001 1~5 Analog Input

-32768 ~ +32767 (Bipolar)

0 ~ +65535 (Unipolar)

R

Table 5-10 (4xxxx) AO address

Begin Address Points Descriptions Range Access Type

40001 1~2 Analog Output

-32768 ~ +32767 (Bipolar)

0 ~ +65535 (Unipolar)

R/W

Table 5-11 (4xxxx) AO address

Begin Address Points Descriptions Range Access Type

40248 1 Reset System

1= Reset System

247= Restore to Factory

Default Settings

W

Table 5-12 (0xxxx) DO address

Begin Address Points Descriptions Range Access Type

00001 1~3 Digital Output

0=OFF, 1=ON R/W

Table 5-13 (1xxxx) DI address

Begin Address

Points Descriptions Range Access Type

10001 1~2 Digital Input 0=OFF, 1=ON R

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 50

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 AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 51

Item Problem Description Solution

5

Cannot execute WF-2000
Utility(v2.0 or later) with the
message like the following
Figure 6-1

Because the ICP DAS WF-2000 Utility(v2.0 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: [e-mail]

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 52

Appendix A.

A.1 Analog Input Type and Data Format Table

Type Code

Input Range

Data Format +F.S -F.S

Engineering Unit

+15.000 -15.000

00h

-15 to +15 mA

2’s comp HEX 7FFFh 8000h

Engineering Unit

+50.000 -50.000

01h

-50 to +50 mA

2’s comp HEX 7FFFh 8000h

Engineering Unit

+100.00 -100.00

02h

-100 to +100 mV

2’s comp HEX 7FFFh 8000h

Engineering Unit

+500.00 -500.00

03h

-500 to +500 mV

2’s comp HEX 7FFFh 8000h

Engineering Unit

+1.0000 -1.0000

04h

-1 to +1 V

2’s comp HEX 7FFFh 8000h

Engineering Unit

+2.5.000 -2.5.000

05h

-2.5 to +2.5 V

2’s comp HEX 7FFFh 8000h

Engineering Unit

+20.000 -20.000

06h

-20 to +20 mA

2’s comp HEX 7FFFh 8000h

Engineering Unit

+20.000 +04.000

07h

+4 to +20 mA

2’s comp HEX FFFFh 0000h

Engineering Unit

+10.000 -10.000

08h

-10 to +10 V

2’s comp HEX 7FFFh 8000h

Engineering Unit

+5.0000 -5.0000

09h

-5 to +5 V

2’s comp HEX 7FFFh 8000h

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 53

Type Code

Input Range

Data Format +F.S -F.S

Engineering Unit

+1.0000 -1.0000

0Ah

-1 to +1 V

2’s comp HEX 7FFFh 8000h

Engineering Unit

+500.00 -500.00

0Bh

-500 to +500 mV

2’s comp HEX 7FFFh 8000h

Engineering Unit

+150.00 -150.00

0Ch

-150 to +150 mV

2’s comp HEX 7FFFh 8000h

Engineering Unit

+20.000 -20.000

0Dh

-20 to +20 mA

2’s comp HEX 7FFFh 8000h

Engineering Unit

+760.00 -210.00

0Eh

Type J

Thermocouple

-210 to 760°C

2’s comp HEX 7FFFh DCA2h

Engineering Unit

+1372.0 -0270.0

0Fh

Type K

Thermocouple

-270 to 1372°C

2’s comp HEX 7FFFh E6D0h

Engineering Unit

+400.00 -270.00

10h

Type T

Thermocouple

-270 to 400°C

2’s comp HEX 7FFFh A99Ah

Engineering Unit

1000.0 -0270.0

11h

Type E

Thermocouple

-270 to 1000°C

2’s comp HEX 7FFFh DD71h

Engineering Unit

+1768.0 +0000.0

12h

Type R

Thermocouple

0 to 1768°C

2’s comp HEX 7FFFh 0000h

Engineering Unit

+1768.0 +0000.0

13h

Type S

Thermocouple

0 to 1768°C

2’s comp HEX 7FFFh 0000h

Engineering Unit

+1820.0 +0000.0

14h

Type B

Thermocouple

0 to 1820°C

2’s comp HEX 7FFFh 0000h

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 54

Type Code

Input Range

Data Format +F.S -F.S

Engineering Unit

+1300.0 -0270.0

15h

Type N

Thermocouple

-270 to 1300°C

2’s comp HEX 7FFFh E56Bh

Engineering Unit

+2320.0 +0000.0

16h

Type C

Thermocouple

0 to 2320°C

2’s comp HEX 7FFFh 0000h

Engineering Unit

+20.000 +00.000

1Ah

0 to +20 mA

2’s comp HEX FFFFh 0000h

Note:

Getting the 7FFFh value in all of the thermocouple type codes, it means
that the thermocouple wires are broken.

A.2 Analog Output Type and Data Format Table

Type Code

Input Range

Data Format +F.S -F.S

Engineering Unit

+20.000 +00.000

30h

0 to +20 mA

2’s comp HEX FFFFh 0000h

Engineering Unit

+20.000 +04.000

31h

+4 to +20 mA

2’s comp HEX FFFFh 0000h

Engineering Unit

+10.000 +00.000

32h

0 to +10 V

2’s comp HEX FFFFh 0000h

Engineering Unit

+10.000 -10.000

33h

-10 to +10 V

2’s comp HEX 7FFFh 8000h

Engineering Unit

+05.000 +00.000

34h

0 to +5 V

2’s comp HEX FFFFh 0000h

Engineering Unit

+05.000 -05.000

35h

-5 to +5 V

2’s comp HEX 7FFFh 8000h

WF-2000 Series AIO

User’s Manual (Ver. 1.2, May./2014) ------------- 55

A.3 CJC (cold junction compensation) Definition

Type

Input Range

Data Format +F.S -F.S

Engineering Unit

+100.00 -030.00

CJC

-30 to +100 ℃

2’s comp HEX 03E8h FED4h