EtherNet/IP™ + Modbus/TCP Fieldbus system

What is EtherNet/IP?

EtherNet/IP (Ethernet Industrial Protocol) is an open, CIP-based fieldbus standard developed by Rockwell Automation and ODVA (Open DeviceNet Vendor Association). The standard is primarily used in automation technology. It is employed in various industries to control and monitor production processes. EtherNet/IP allows devices from different manufacturers to communicate with each other without the need for special interface adaptations.

 

What is Modbus TCP?

Modbus TCP is an open fieldbus standard for industrial communication via Ethernet. The widely used standard is mainly used in automation technology and enables devices from different manufacturers to communicate without any special interface adaptations. Modbus TCP is available in different operating modes for data exchange via serial interfaces. The operating modes supported are RTU, ASCII, and TCP. Modbus was originally developed by the company Gould-Modicon.

EtherNet/IP + Modbus/TCP Gateways

EtherNet/IP + Modbus/TCP ASi Gateways

EtherNet/IP + Modbus/TCP ASi gateways in stainless steel provide an interface for an EtherNet/IP + Modbus/TCP fieldbus. The certified ASi Gateways are available in different versions with IP20 protection class, e.g., with integrated decoupling, OPC UA interface and integrated web server for easy diagnostics and maintenance.

 

More about EtherNet/IP + Modbus/TCP ASi Gateways

EtherNet/IP + Modbus/TCP ASi

Figure Model

Communication interface between fieldbus and gateway:

interfaces for standardized fieldbus systems in industrial automation. Bihl+Wiedemann offers a wide range of gateways for common fieldbus interfaces:

 

  • PROFIBUS
  • PROFINET
  • EtherNet/IPTM + Modbus TCP
  • BACnet/IP
  • DeviceNet
  • ControlLogix
  • Compact-/MicroLogix
  • EtherCat
  • POWERLINK
  • CC-Link
  • CANopen
  • RS 485 Modbus
  • OPC UA server

 

Fieldbus interface

The device communicates via the standard ASi-3 and/or ASi-5.

ASi-5/ASi-3
Standard devices

"Single Master":

1 ASi network, 1 ASi-5/ASi-3 Master.

1 ASi network, 1 ASi-3 Master.

"Double Master":

2 ASi networks, 2 ASi-5/ASi-3 Masters.

2 ASi networks, 2 ASi-3 Masters.

Safety devices

"Single Master" :

1 ASi network, 1 ASi-5/ASi-3 Master.

1 ASi network, 1 ASi-3 Master.

"Double Master" :

2 ASi networks, 2 ASi-5/ASi-3 Masters.

2 ASi networks, 2 ASi-3 Masters.

"Optional ASi Safety coupling circuit" :
2 ASi networks, 1 ASi-3 Master.

Number of ASi networks, number of ASi Master

" yes, max. 4 A/ASi network ":

Data decoupling integrated in the gateway. Cost-effective power for 2 ASi networks with 1 power supply (optionally supply of multiple Single Gateways by 1 power supply).

Operation with short cable lengths with standard 24 V power supply possible.


" yes, max. 8 A/ASi network ":

Data decoupling integrated in the gateway. Cost-effective power for 2 ASi networks with 1 power supply (optionally supply of multiple Single Gateways by 1 power supply).

Operation with short cable lengths with standard 24 V power supply possible.


"yes, optimized for 2 x NEC class 2 power supplies"

Data decoupling integrated in the gateway. Optimized for use with 2 x UL certified 30 V/3 A power supplies with power limitation <100 W (BW4223). In combination 2 separate NEC Class 2 compliant ASi circuits are created.


"no, max. 8 A/ASi network, redundant supply ":

1 ASi power supply per ASi network. Gateway is powered in normal operation from one of the two ASi power supplies.

Should one ASi power supply fail, switching to the other ASi power supply allows all the diagnostics functions to be maintained and the unaffected ASi network continues to operate.


" no, max. 8 A/ASi network ":

1 ASi power supply per ASi network.

Integrated decoupling, ASi current measurement in the gateway

Access to ASi master and safety monitor via own software from Bihl+Wiedemann using the diagnostic interface (e.g. USB, RJ45, RS232). For certain devices with Ethernet-based fieldbus (PROFINET, EtherNet/IP), there is also the option of diagnostics and configuration directly via the fieldbus interface.

 

The latest version of the device description file of the gateway/gateway with integrated safety monitor (GSD, GSDML, EDS, etc.) is available in the "Downloads" section of the respective device.

Diagnostic and configuration interface

Detects whether the same address has been assigned to two ASi nodes. Frequent error when using a handheld addressing device.

Recognition of duplicate ASi addresses

Checks the ASi line for interference effects such as noise, external voltages, ...

ASi fault detector

Using a C-program offers the possibility to run mini-PLC functions with a gateway.

Programming in C
Article No.
BWU3851
Gateway
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
2 ASi networks, 2 ASi-5/ASi-3 Masters
yes, max. 4 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
yes
yes
optional
BWU4258
Gateway
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
2 ASi networks, 2 ASi-5/ASi-3 Masters
yes, max. 8 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
yes
yes
optional
BWU3849
Gateway
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
1 ASi network, 1 ASi-5/ASi-3 Master
yes, max. 4 A/ASi network
Ethernet fieldbus
yes
yes
no
BWU4019
Gateway
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
1 ASi network, 1 ASi-5/ASi-3 Master
yes, max. 8 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
yes
yes
optional
BWU4957
Gateway
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible
2 ASi networks, 2 ASi-3 Masters
yes, max. 8 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
yes
yes
optional
BWU3736
Gateway
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible
2 ASi networks, 2 ASi-3 Masters
yes, max. 4 A/ASi network
Ethernet fieldbus
yes
yes
optional
BWU4958
Gateway
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible
1 ASi network, 1 ASi-3 Master
yes, max. 8 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
yes
yes
optional
BWU3822
Gateway
EtherNet/IP, Modbus/TCP, OPC UA
ASi-3 compatible
1 ASi network, 1 ASi-3 Master
yes, max. 4 A/ASi network
Ethernet fieldbus
yes
yes
no
BWU3734
Gateway
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible
1 ASi network, 1 ASi-3 Master
no, max. 8 A/ASi network
Ethernet fieldbus
yes
yes
optional
BW4229
Starter Kits
EtherNet/IP, Modbus/TCP, OPC UA
ASi-5 compatible
1 ASi network, 1 ASi-5/ASi-3 Master
yes, max. 4 A/ASi network
Ethernet fieldbus
yes
yes
-

Safety, EtherNet/IP + Modbus/TCP ASi Gateways

The certified ASi gateways with integrated safety monitor are available in different versions with protection class IP20. All gateways feature the Safe Link technology, which makes it possible to connect different system components easily and flexibly. Some product variants offer integrated CIP Safety communication for easy integration of the safe signals into the safe Rockwell PLC.

Safety, EtherNet/IP + Modbus/TCP ASi

Figure Model

Communication interface between fieldbus and gateway:

interfaces for standardized fieldbus systems in industrial automation. Bihl+Wiedemann offers a wide range of gateways for common fieldbus interfaces:

 

  • PROFIBUS
  • PROFINET
  • EtherNet/IPTM + Modbus TCP
  • BACnet/IP
  • DeviceNet
  • ControlLogix
  • Compact-/MicroLogix
  • EtherCat
  • POWERLINK
  • CC-Link
  • CANopen
  • RS 485 Modbus
  • OPC UA server

 

Fieldbus interface

The device communicates via the standard ASi-3 and/or ASi-5.

ASi-5/ASi-3
Standard devices

"Single Master":

1 ASi network, 1 ASi-5/ASi-3 Master.

1 ASi network, 1 ASi-3 Master.

"Double Master":

2 ASi networks, 2 ASi-5/ASi-3 Masters.

2 ASi networks, 2 ASi-3 Masters.

Safety devices

"Single Master" :

1 ASi network, 1 ASi-5/ASi-3 Master.

1 ASi network, 1 ASi-3 Master.

"Double Master" :

2 ASi networks, 2 ASi-5/ASi-3 Masters.

2 ASi networks, 2 ASi-3 Masters.

"Optional ASi Safety coupling circuit" :
2 ASi networks, 1 ASi-3 Master.

Number of ASi networks, number of ASi Master

" yes, max. 4 A/ASi network ":

Data decoupling integrated in the gateway. Cost-effective power for 2 ASi networks with 1 power supply (optionally supply of multiple Single Gateways by 1 power supply).

Operation with short cable lengths with standard 24 V power supply possible.


" yes, max. 8 A/ASi network ":

Data decoupling integrated in the gateway. Cost-effective power for 2 ASi networks with 1 power supply (optionally supply of multiple Single Gateways by 1 power supply).

Operation with short cable lengths with standard 24 V power supply possible.


"yes, optimized for 2 x NEC class 2 power supplies"

Data decoupling integrated in the gateway. Optimized for use with 2 x UL certified 30 V/3 A power supplies with power limitation <100 W (BW4223). In combination 2 separate NEC Class 2 compliant ASi circuits are created.


"no, max. 8 A/ASi network, redundant supply ":

1 ASi power supply per ASi network. Gateway is powered in normal operation from one of the two ASi power supplies.

Should one ASi power supply fail, switching to the other ASi power supply allows all the diagnostics functions to be maintained and the unaffected ASi network continues to operate.


" no, max. 8 A/ASi network ":

1 ASi power supply per ASi network.

Integrated decoupling, ASi current measurement in the gateway

Access to ASi master and safety monitor via own software from Bihl+Wiedemann using the diagnostic interface (e.g. USB, RJ45, RS232). For certain devices with Ethernet-based fieldbus (PROFINET, EtherNet/IP), there is also the option of diagnostics and configuration directly via the fieldbus interface.

 

The latest version of the device description file of the gateway/gateway with integrated safety monitor (GSD, GSDML, EDS, etc.) is available in the "Downloads" section of the respective device.

Diagnostic and configuration interface
Safety communication

Safe inputs can be configured as 1-channel or 2-channels depending on the desired application or PL and SIL level.


Suitable for applications up to category 4/PLe/SIL 3.

Inputs Safety

Suitable for applications up to category 4/PLe/SIL 3.

Outputs Safety

Detects whether the same address has been assigned to two ASi nodes. Frequent error when using a handheld addressing device.

Recognition of duplicate ASi addresses

Checks the ASi line for interference effects such as noise, external voltages, ...

ASi fault detector

Using a C-program offers the possibility to run mini-PLC functions with a gateway.

Programming in C
Article No.
BWU3857
Gateway with integrated Safety Monitor
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
2 ASi networks, 2 ASi-5/ASi-3 Masters
yes, max. 4 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
CIP Safety over EtherNet/IP, Safe Link
3 x 2 channels
6 release circuits, 6 x electronic safe outputs
yes
yes
optional
BWU3958
Gateway with integrated ASi-5/ASi-3 Safety Monitor
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
2 ASi networks, 2 ASi-5/ASi-3 Masters
yes, max. 4 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
Safe Link
3 x 2 channels, 6 x 1 channel
6 release circuits, 6 x electronic safe outputs
yes
yes
optional
BWU3947
Gateway with integrated ASi-5/ASi-3 Safety Monitor
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
2 ASi networks, 2 ASi-5/ASi-3 Masters
yes, optimized for 2 x NEC class 2 power supplies
Ethernet diagnostic, Ethernet fieldbus
Safe Link
3 x 2 channels, 6 x 1 channel
6 release circuits, 6 x electronic safe outputs
yes
yes
optional
BWU3825
Gateway with integrated Safety Monitor
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
2 ASi networks, 2 ASi-5/ASi-3 Masters
yes, max. 4 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
Safe Link
3 x 2 channels
6 release circuits, 6 x electronic safe outputs
yes
yes
optional
BWU3957
Gateway with integrated ASi-5/ASi-3 Safety Monitor
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
1 ASi network, 1 ASi-5/ASi-3 Master
yes, max. 4 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
Safe Link
3 x 2 channels, 6 x 1 channel
6 release circuits, 6 x electronic safe outputs
yes
yes
optional
BWU3866
Gateway with integrated Safety Monitor
EtherNet/IP, Modbus/TCP, OPC UA, REST API
ASi-3 compatible, ASi-5 compatible
1 ASi network, 1 ASi-5/ASi-3 Master
yes, max. 4 A/ASi network
Ethernet diagnostic, Ethernet fieldbus
Safe Link
3 x 2 channels
6 release circuits, 6 x electronic safe outputs
yes
yes
optional

GE Digital Achilles® Robustness Test (Level 1 and 2, Version No. 3.18)

Ethernet fieldbus interface (PROFINET, EtherNet/IP) and Ethernet diagnostic interface of the ASi-5/ASi-3 gateways are submitted to strict robustness testing via the Achilles Test Software to ensure robustness against vulnerabilities to cyber attacks. The field update capabilities of the gateway enable continuous firmware and security updates to continuously improve the functionality and robustness of the device.

EtherNet/IP Master Simulator

EtherNet/IP Master Simulator software is a simple, universal tool for the exchange of data with EtherNet devices of almost all manufacturers.

 

EtherNet/IP Master Simulators allow data exchange with many EtherNet/IP devices even without an EtherNet/IP Master. They also support the use of EDS files and allow specific configuration entries to start data exchange with EtherNet/IP devices. Identification, renaming, and address assignment of EtherNet/IP devices is also possible.

 

More about EtherNet/IP Master Simulators

EtherNet/IP Master Simulator

Figure Type Safety fieldbus Log function of I/O data Sending of acyclic data Article No.
BW4693
EtherNet/IP Master Simulator
CIP Safety
yes
no