Phoenix Contact GW MODBUS TCP/ASCII 1E/1DB9 User manual

User manual
Protocol converter for serial data
(RAW/ASCII) to Modbus TCP

2017-06-16
PHOENIX CONTACT 3749_en_B
Protocol converter for serial data (RAW/ASCII) to Modbus TCP
B
Designation Order No.
GW MODBUS TCP/ASCII 1E/1DB9
GW MODBUS TCP/ASCII 1E/2DB9
GW MODBUS TCP/ASCII 2E/2DB9
GW MODBUS TCP/ASCII 2E/4DB9
2702768
2702769
2702770
2702771
User manual
Revision:
This user manual is valid for:

PHOENIX CONTACT
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User group of this manual
The use of products described in this manual is oriented exclusively to qualified application
programmers and software engineers, who are familiar with the safety concepts of
automation technology and applicable standards.
Explanation of symbols used and signal words
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PHOENIX CONTACT
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Phoenix Contact reserves the right to alter, correct, and/or improve the technical
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3749_en_B PHOENIX CONTACT 1
Table of contents
1 Description..................................................................................................................................3
1.1 Structure................................................................................................................ 4
2 Installation ..................................................................................................................................9
2.1 Safety regulations and installation notes ............................................................... 9
2.2 Mounting ............................................................................................................... 9
2.3 Data interfaces .................................................................................................... 11
2.3.1 Connecting the V.24 (RS-232) cable ................................................... 11
2.3.2 Connecting the RS-422 cable .............................................................. 12
2.3.3 Connecting the RS-485 cable .............................................................. 12
2.3.4 Connecting the Ethernet cable ............................................................. 13
2.4 Connecting the power supply .............................................................................. 14
3 Configuration and startup..........................................................................................................15
3.1 Default settings.................................................................................................... 15
3.2 Web-based management .................................................................................... 15
3.3 Login ................................................................................................................... 15
3.4 Home screen ....................................................................................................... 16
3.5 General settings .................................................................................................. 17
3.6 LAN settings ........................................................................................................ 18
3.6.1 IP address ............................................................................................ 18
3.6.2 Security ................................................................................................ 19
3.7 Serial settings ...................................................................................................... 20
3.7.1 Port configuration ................................................................................. 21
3.7.2 Raw/ASCII connection ......................................................................... 22
3.8 Socket settings .................................................................................................... 28
3.8.1 Socket settings .................................................................................... 29
3.8.2 Raw/ASCII configuration ...................................................................... 30
3.9 Diagnostics.......................................................................................................... 36
3.9.1 Communication Statistics .................................................................... 36
3.9.2 PLC interface ....................................................................................... 38
3.9.3 Serial logs ............................................................................................ 40
3.9.4 Ethernet logs ........................................................................................ 41
3.10 Maintenance........................................................................................................ 42
3.10.1 Passwords ........................................................................................... 42
3.10.2 Restore defaults ................................................................................... 43
3.10.3 Log files ............................................................................................... 43
3.10.4 Configuration files ................................................................................ 44
3.10.5 Update firmware .................................................................................. 45

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4 Application examples................................................................................................................47
4.1 Connecting a barcode scanner to a Modbus TCP client...................................... 47
4.1.1 GW MODBUS TCP/ASCII... configuration ........................................... 47
4.1.2 Modbus TCP client configuration ......................................................... 48
4.2 Serial barcode scanner to Modbus TCP server ................................................... 48
4.2.1 GW MODBUS TCP/ASCII… configuration ........................................... 48
4.2.2 Modbus TCP server configuration ........................................................ 49
4.3 Serial barcode scanner to Modbus RTU/ASCII master........................................ 49
4.3.1 GW MODBUS TCP/ASCII... configuration ........................................... 49
4.3.2 Modbus RTU master configuration ...................................................... 50
4.4 TCP/IP barcode scanner to Modbus RTU/ASCII master ..................................... 50
4.4.1 GW MODBUS TCP/ASCII... configuration ........................................... 50
4.4.2 Modbus RTU master configuration ...................................................... 51
4.5 TCP/IP barcode scanner to Modbus TCP client .................................................. 51
4.5.1 GW MODBUS TCP/ASCII... configuration ........................................... 51
4.5.2 Modbus TCP client configuration ......................................................... 52
4.5.3 TCP/IP barcode scanner ...................................................................... 52
4.6 TCP/IP barcode scanner to Modbus TCP server ................................................. 53
4.6.1 GW MODBUS TCP/ASCII... configuration ........................................... 53
4.6.2 Modbus TCP server configuration ........................................................ 54
4.7 Example Modbus representation of a barcode value of 0123456789Zz5 ............ 54
5 Troubleshooting........................................................................................................................55
5.1 Resetting the device ............................................................................................ 55
5.1.1 Hardware reset .................................................................................... 55
5.1.2 Software reset ...................................................................................... 55
5.2 LEDs.................................................................................................................... 55
6 Modbus addressing ..................................................................................................................57
6.1 Modbus memory map for Raw/ASCII data .......................................................... 57
6.2 Sequence numbers ............................................................................................. 60
A Appendixes...............................................................................................................................61
A 1 List of figures ...................................................................................................... 61
B 2 List of tables ....................................................................................................... 63

Description
3749_en_B PHOENIX CONTACT 3
1Description
The GW MODBUS TCP/ASCII... devices provide a simple way to integrate Raw/ASCII
serial and Ethernet devices, such as barcode scanners, weigh scales, or RFID tags, into
Modbus®TCP, RTU, or ASCII controllers.
The family consists of universal RS232/422/485 one-, two-, and four-port serial versions,
with one or two Ethernet ports to fit any application.
This user manual is valid for:
Table 1-1 GW MODBUS TCP/ASCII...types
Type Description Order No.
GW MODBUS TCP/ASCII 1E/1DB9 2702768
GW MODBUS TCP/ASCII 1E/2DB9 2702769
GW MODBUS TCP/ASCII 2E/2DB9 2702770
GW MODBUS TCP/ASCII 2E/4DB9 2702771

GW MODBUS TCP/ASCII...
4PHOENIX CONTACT 3749_en_B
1.1 Structure
GW MODBUS TCP/ASCII 1E/1DB9
The GW MODBUS TCP/ASCII 1E/1DB9 features one Ethernet port and one RS-
232/422/485 serial port with a D-SUB 9 connector.
Figure 1-1 GW MODBUS TCP/ASCII 1E/1DB9
Table 1-2 GW MODBUS TCP/ASCII 1E/1DB9 structure
Item Description
1 Power connector
2 P1 D-SUB 9 connector
3 Ethernet port (RJ45)
4StatusLED
5 Reset button
6 Ethernet activity status LED
7 Ethernet link status LED
1
2
3
4
5
6
7

Description
3749_en_B PHOENIX CONTACT 5
GW MODBUS TCP/ASCII 1E/2DB9
The GW MODBUS TCP/ASCII 1E/2DB9 features one Ethernet port and two RS-
232/422/485 serial ports with D-SUB 9 connectors.
Figure 1-2 GW MODBUS TCP/ASCII 1E/2DB9
Table 1-3 GW MODBUS TCP/ASCII 1E/2DB9 structure
Item Description
1 Power connector
2P1D-SUB9connector
3 Ethernet port (RJ45)
4P2D-SUB9connector
5 Status LED
6 Ethernet activity status LED
7 Ethernet link status LED
8 Reset button
1
2
3
8
5
4
6
7

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GW MODBUS TCP/ASCII 2E/2DB9
The GW MODBUS TCP/ASCII 2E/2DB9 features two Ethernet ports with integrated switch
functionality and two RS-232/422/485 serial ports with D-SUB 9 connectors.
Figure 1-3 GW MODBUS TCP/ASCII 2E/2DB9
Table 1-4 GW MODBUS TCP/ASCII 2E/2DB9 structure
Item Description
1 Power connector
2 P1 D-SUB 9 connector
3 Ethernet link status LED
4 E2 Ethernet port (RJ45)
5 Ethernet activity status LED
6 P2 D-SUB 9 connector
7 Status LED
8 Ethernet activity status LED
9 E1 Ethernet port (RJ45)
10 Ethernet link status LED
11 Reset button
1
2
4
11
7
6
8
3
5
9
10

Description
3749_en_B PHOENIX CONTACT 7
GW MODBUS TCP/ASCII 2E/4DB9
The GW MODBUS TCP/ASCII 2E/4DB9 features two Ethernet ports with integrated switch
functionality and four RS-232/422/485 serial ports with D-SUB 9 connectors.
Figure 1-4 GW MODBUS TCP/ASCII 2E/4DB9
Table 1-5 GW MODBUS TCP/ASCII 2E/4DB9 structure
Item Description
1 Power connector
2 P3 D-SUB 9 connector
3 Ethernet link status LED
4 E2 Ethernet port (RJ45)
5 Ethernet activity status LED
6 P4 D-SUB 9 connector
7 P2 D-SUB 9 connector
8StatusLED
9 Ethernet activity status LED
10 E1 Ethernet port (RJ45)
11 Ethernet link status LED
12 Reset button
13 P1 D-SUB 9 connector
1
2
8
12
6
13
7
4
3
5
9
10
11

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Installation
3749_en_B PHOENIX CONTACT 9
2 Installation
2.1 Safety regulations and installation notes
Installation, operation, and maintenance may be carried out only by qualified electricians.
Follow the specified installation instructions. The applicable specifications and safety
directives (including the national safety directives), as well as the general technical
regulations, must be observed during installation and operation. The technical data should
be taken from the packaging instructions and the certificates (conformity assessment, other
possible approvals).
Opening the device or making changes to it is not permitted. Do not repair the device
yourself, but replace it with an equivalent device. Repairs may be carried out only by the
manufacturer. The manufacturer is not liable for any damage caused by violation of the
prescribed regulations.
The IP20 degree of protection (EN 60529) of the device is intended for a clean and dry
environment.
Do not subject the device to any load that exceeds the prescribed limits.
The device is not designed for use in environments with danger of dust explosions.
2.2 Mounting
To mount on the DIN rail:
1. Place the device onto the DIN rail from above (A), so that the upper housing keyway
hooks onto the top edge of the DIN rail.
2. Hold the device by the housing cover and carefully push the device toward the
mounting surface (B).
3. After the foot is snapped onto the DIN rail, verify that it is attached securely.
Figure 2-1 DIN rail mounting
A
B

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10 PHOENIX CONTACT 3749_en_B
To remove:
1. Use a suitable screwdriver to release the locking mechanism (A) on the snap-on foot
of the device.
2. Hold onto the device by the housing cover and carefully tilt it upward (B).
3. Remove the device from the DIN rail (C).
Figure 2-2 DIN rail removal
A
C
B

Installation
3749_en_B PHOENIX CONTACT 11
2.3 Data interfaces
2.3.1 Connecting the V.24 (RS-232) cable
The D-SUB 9 connector may function as an RS-232, RS-422, or RS-485 interface. The
RS-232 interface is a data terminal equipment (DTE) device that behaves like a personal
computer (PC). A null modem cable or adapter is required to connect to a PC.
Connect the GW MODBUS TCP/ASCII... to the V.24 (RS-232) device to be connected (for
example, a PC) by way of the PSM-KA-9SUB 9/BB/2 METER V.24 (RS-232) cable (Order
No. 2799474). The cable is an interface cable with 1:1 connected contacts.
The V.24 (RS-232) interface of the GW MODBUS TCP/ASCII... is a DTE assignment.
Table 2-1 D-SUB 9 to RS-232 pin out
GW MODBUS
TCP/ASCII...
End device
RS-232 D-SUB 9
(DCE)
D-SUB 9
(DTE)
D-SUB 25
(DCE)
D-SUB 25
(DTE)
1DCD1 4 8 20
2RxD2 3 3 2
3TxD3 2 2 3
4DTR4 1,6 20 6,8
5GND5 5 7 7
6DSR6 4 6 20
7RTS7 8 4 5
8CTS8 7 5 4
9RI 9 - 22 -

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2.3.2 Connecting the RS-422 cable
Figure 2-3 Pin 1 location
In RS-422 mode, a point-to-point connection can be established. Use a twisted-pair,
common shielded bus cable to connect the I/O device.
To connect the RS-422 cable:
1. Connect the individual conductors of the data cable to the GW MODBUS TCP/ASCII...
using a SUBCON 9/F SH (Order no. 2761499).
2. Make sure the signal assignment is correct.
This operating mode supports full duplex transmission mode.
2.3.3 Connecting the RS-485 cable
In RS-485 mode, an RS-485 network with several I/O devices can be created. Use a
twisted-pair, common shielded bus cable to connect the I/O devices.
Connect the individual conductors of the data cable to the GW MODBUS TCP/ASCII...
using a SUBCON 9/F SH (Order no. 2761499)(see Table 2-2).
Table 2-2 D-SUB 9 to RS-422 and RS-485 pin out
GW MODBUS TCP/ASCII... End device
RS-422 RS-485 RS-422 RS-485
2T(A) – D(A)–
3 D(A) D(A) T(A) D(A)
5 GND GND GND GND
7 D(B) D(B) T(B) D(B)
8T(B) – D(B)–
1
NOTE:
Observe the polarity of the RS-485 cable.
Fit this bus cable with a termination network at the two furthest points of the RS-485
network.
The termination resistors are integrated in the GW MODBUS TCP/ASCII... and can be
switched on through the web-based management interface.

Installation
3749_en_B PHOENIX CONTACT 13
2.3.4 Connecting the Ethernet cable
The GW MODBUS TCP/ASCII... has an Ethernet interface on the front in RJ45 format, to
which only twisted-pair cables with an impedance of 100 Ωcan be connected. The data
transmission rate is either 10 or 100 Mbps. The GW MODBUS TCP/ASCII... supports the
auto negotiation function for automatic selection of the transmission speed, as well as an
automatic crossover feature for the automatic selection of line or crossover cabling.
Push the Ethernet cable with the crimped RJ45 connector into the GW MODBUS
TCP/ASCII...until it engages with a click.
2.3.4.1 Models with two Ethernet ports
When using two Ethernet ports, the GW MODBUS TCP/ASCII... is classified as a switch.
When using only one port, it is a simple end node device. The maximum number of daisy-
chained GW MODBUS TCP/ASCII... units, and the maximum distance between units, is
based on the Ethernet standards and is determined by the environment and conformity of
the network to these standards. There may be some performance degradation on the
devices at the end of the chain, so it is recommended to overload and test for performance
in the environment. The application may also limit the total number of ports that may be
installed. Some basic guidelines are listed below.
–Ethernet10BASE-Trules
– The maximum number of repeater segments is four.
– Use Category 3 or 5 twisted-pair 10BASE-T cables. The maximum length of each
cable is 100 m (328 ft.).
– Fast Ethernet 100BASE-TX rules
– The maximum number of repeater segments is two (for a Class II hub). A Class II
hub can be connected directly to one other Class II Fast Ethernet hub. A Class I hub
cannot be connected directly to another Fast Ethernet hub.
– Category 5 twisted-pair cable must be used. The maximum length of each twisted-
pair cable is 100 m (328 ft.).
– The total length of twisted-pair cabling (across directly connected hubs) must not
exceed 205 m (672 ft.).
– IEEE 802.3 specification: A network using repeaters between communicating stations
(PCs) is subject to the 5-4-3 rule of repeater placement on the network:
– Five segments connected on the network.
– Four repeaters.
– Three segments of the fiber segments can have stations connected. The other two
segments must be inter-repeater link segments with no stations connected.

GW MODBUS TCP/ASCII...
14 PHOENIX CONTACT 3749_en_B
2.4 Connecting the power supply
The device can be connected to a single power source or two power sources for
redundancy. The GW MODBUS TCP/ASCII... is powered using a +24 V DC SELV power
supply. The power supply is connected by way of COMBICON plug-in screw terminal
blocks (24 V and 0 V).
Figure 2-4 Single power supply connection
Figure 2-5 Redundant power supply connection
CAUTION:
Incorrect connection may result in damage to equipment and/or serious personal injury.
Only qualified personnel may connect the power, start up, and operate this device.
According to the safety instructions in this text, qualified personnel are persons who are
authorized to start up, to ground, and to mark devices, systems, and equipment according
to the standards of safety technology. In addition, these persons must be familiar with all
warning instructions and maintenance measures in this text.
Disregarding this warning may result in damage to equipment and/or serious personal
injury.

Configuration and startup
3749_en_B PHOENIX CONTACT 15
3 Configuration and startup
3.1 Default settings
The default network settings of the GW MODBUS TCP/ASCII... are:
IP address: 192.168.254.254
Subnet mask: 255.255.255.0
Gateway: 0.0.0.0
3.2 Web-based management
The user-friendly, web-based management interface, a graphical user interface (GUI), can
be used to manage the GW MODBUS TCP/ASCII... from anywhere in the network using a
standard browser. Comprehensive configuration and diagnostic functions, including a wide
range of information about the device itself, the current parameters, and the operating
state, are clearly displayed.
3.3 Login
To login:
1. Set the IP address of the connected PC to the sub-network of the GW MODBUS
TCP/ASCII...: for example, IP = 192.168.254.10, sub-network = 255.255.255.0.
2. Open a web browser and enter the IP address of the GW MODBUS TCP/ASCII... in the
“Address” field (default = 192.168.254.254).
Figure 3-1 “Login” screen
The default settings are invoked whenever the system is reset.

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16 PHOENIX CONTACT 3749_en_B
The web server responds immediately.
3. Enter the credentials to access the web server configuration pages. The default
credentials are:
User name: Admin
Default password: admin
3.4 Home screen
Immediately after login, the “Home” screen is displayed. From the “Home” screen, click the
desired port on the diagram to access the basic configuration parameters for that port.
Figure 3-2 “Home” screen
Advanced settings can be accessed through the menu at the top of the screen. Click the
“Home” button in the upper left corner of the web-based management interface to go to the
“Home” screen.
If the web server does not load, first check the IP parameters of the PC. If everything is set
correctly, check to see if there are any proxy settings loaded in the web browser. The proxy
setting must be set to “Load automatically” or “Deactivated” to properly establish
communication.
Powering multiple devices with factory default IP addresses causes a network conflict, and
incorrect parameters may be set in the GW MODBUS TCP/ASCII... modules. When
programming modules for the first time, it is important to apply power to only one at a time,
and change the IP address of each module to a unique IP address. Once all devices have
a unique IP address, they can be powered on together while on the same network.