Modicon M340, Premium, Atrium, and Quantum Using Unity Pro
Communication Architectures
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Communication Architectures
Chapter 4
Communication Architectures
Subject of this Chapter
This chapter gives an overview of the different communication architectures.
What Is in This Chapter?
This chapter contains the following topics:
Topic
Global Architecture
Network Architectures
Fieldbus
Page
42
46
50
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Communication Architectures
Global Architecture
At a Glance
Schneider has a communications strategy based on open standards (core of the range) such as:
Ethernet Modbus TCP/IP
CANopen
AS-Interface
Modbus Link Series
This has not always been the case and there are a significant number of installed bases on networks or proprietary buses such as Modbus Plus, Fipway, Ethway, X-Way on TCP/IP, Fipio,
Symax and Uni-telway.
Schneider offers a connectivity range for the main standards available on the market through its
Profibus, Interbus and TCPopen ranges.
The possible and recommended communication architectures are presented in the following pages, according to the type of PLC used:
At level 2: Inter-PLC network (
see page 46
),
At level 1: Field Bus (
see page 50
).
The communication solutions for existing installations, from the Telemecanique or Modicon ranges, are then presented.
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Communication Architectures
Global Architecture
The following diagram shows a global communication architecture with an AS-i bus:
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Communication Architectures
The following diagram shows a global communication architecture with a Modbus and Uni-Telway bus:
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Communication Architectures
The following diagram shows a global communication architecture with a Modbus and Fipio bus:
NOTE: Depending on the type of network used, the interconnection is made either directly via a
PLC which routes the information (Ethernet/Uni-Telway), or via an additional device such as a bridge (Ethernet/Modbus) or switch (Ethernet/Ethernet).
NOTE: Technically, sophisticated solutions using Ethernet, Modbus Plus, Fipway, Fipio, Modbus,
Uni-Telway etc. in a single architecture are possible. However, to facilitate maintenance, user training and to reduce operating costs, it is recommended that you aim for maximum homogeneity between the types of networks and buses used. In the following architecture examples, we give an overview of the most suitable solutions depending on the devices connected.
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Communication Architectures
Network Architectures
At a Glance
Various network architectures are available. The Schneider product range enables you to create standard Ethernet mono-networks as well as transparent multi-network architectures
(Ethernet/Fipway/Modbus Plus). The following examples of network architectures show the various optimal solutions provided by Schneider products.
NOTE: The selection of an architecture with the Modbus Plus network or Fipway network is strongly linked to the use of Quantum or Premium devices:
Modbus Plus for Quantum and Premium PLCs,
Fipway for Premium PLCs.
NOTE: In the following illustrations, the arrows show the different communication possibilities.
NOTE: An attempt has been made to show all the available scenarios.
NOTE: The types of communication shown in the homogeneous Ethernet networks are also possible when these networks are extended using Modbus Plus or Fipway segments.
Mono-Network Ethernet Architecture
The diagram below shows an Ethernet mono-network:
46
NOTE: All inter-device exchanges are possible.
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Multi-Network Ethernet Architecture
The diagram below shows an Ethernet multi-network:
Communication Architectures
NOTE: All inter-device exchanges are possible.
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Communication Architectures
Multi-Network Ethernet/Modbus Architecture
The diagram below shows an Ethernet/Modbus multi-network:
48
NOTE: Access is possible from devices on the Modbus Plus network across Ethernet/Modbus Plus bridges. In contrast, the devices on the second Modbus Plus network cannot be accessed by an
Ethernet device via the Bridge Plus.
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Multi-Network Ethernet/Fipway Architecture
The diagram below shows an Ethernet/Fipway multi-network:
Communication Architectures
NOTE: All inter-device exchanges are possible.
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Communication Architectures
Fieldbus
At a Glance
The CPU uses many types of fieldbus: Ethernet, CANopen, Modbus, Modbus Plus, AS-i, Fipway,
Uni-Telway, Fipio, INTERBUS, and PROFIBUS.
Field buses addressed by each platform:
Fieldbus
Ethernet
CANopen
Modbus
Modbus Plus
AS-i
Fipway
Uni-Telway
Fipio
INTERBUS
PROFIBUS
Platform
M340
X*, O
X*
X, O
O*
O
–
–
–
–
O*
M580
X, O
–
O
O*
O
–
–
–
–
O*
Quantum
X*, O
–
X
X
O
–
–
–
O
O, O*
Momentum
X*
O
X
O
–
–
–
O
O
O
Premium
X*, O
O
O
O
O
O
X, O
X*
O
O, O*
X Embedded in the CPU.
X* Embedded is some CPUs.
O Available through extension modules (inserted in the CPU or added in a rack).
O* Communication is performed using a gateway connected to the Ethernet distributed network addressed by the CPU or by an Ethernet module.
– Not available.
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