ProfiNet (Industrial Ethernet)
Industrial Ethernet is an industrial communication system based on TCP/IP.
Addresses can be assigned by name
Achieving open and distributed automation
Enables comprehensive communication via fieldbus and Ethernet
It enables communication from the field level to the main control level.
Real-time communication is possible
ProfiNetIO Basics
Data exchange is performed according to the master-slave principle (device controller). Industrial Ethernet input/output ports use the following types of equipment:
Manager: Can be a programmer or an industrial computer.
Both the manager and the controller can access all process data and parameter data.
Controller: A higher-level control device that governs all components of the equipment. (e.g., KRC4)
Slave device: A field device (e.g., input/output board) that receives operation and monitoring from a controller. A slave device consists of multiple modules and sub-modules. A slave device can have multiple controllers (masters).
ProfiNetIO variants
ProfiNetIO (Industrial Ethernet Input/Output)
Industrial Ethernet input/output ports enable distributed field devices (input/output devices, such as signal processing boards) to be directly connected to the industrial Ethernet network.
Transmit business data using real-time communication functions
Configuring and Diagnosing using TCP/IP
Input/output managers can serve HMI and diagnostic functions.
ProfiNetIO communication mode
The input/output controller and the input/output device transmit data via the following channels.
Real-time transmission of cyclic service data and alarms via channel
Perform parameter setting, configuration, or diagnostics of other key data via standard TCP/IP and/or UDP/IP channels:
Each industrial Ethernet protocol can transmit up to 1440 bytes of service data.
Up to 256 slave devices can be controlled using the existing ProfiNet-Stack in KRC4.
ProfiNet Real-time
Real-time applications typically do not run synchronously.
Applications, data transmissions, and field devices have different processing cycles.
Both the periodicity and image jitter are very inaccurate.
ProfiNet real-time synchronization
Clockwise synchronous data transmission
Applications, data transmission, and instrument cycles are kept synchronized.
Periodicity < 1ms, image jitter accuracy < 0.001ms
Therefore, a special type of circuit board is required.
A typical application area is motion control.
ProfiNet broadband placeholder
Notice:
The following points must be noted when using a converter:
100MBits/s high-speed Ethernet interface
Full-duplex
HUBS (hubs) must not be used, otherwise it will cause a significant increase in bus load!
Real-time determinism: "determinism" describes the accurate predictability of a system's temporal behavior.
KRC4 and ProfiNet connection
The KRC4 control cabinet can be used for the following purposes:
As a controller: used to control all components of a set of equipment.
As a subordinate device: it accepts the operation and monitoring of a controller (e.g., a programmable controller).
As a controller and slave device: used to control field equipment, and simultaneously connected to a higher-level programmable controller.
transmission medium
The transmission medium for industrial Ethernet input/output terminals is a four-core shielded twisted-pair cable.
structure
Components
In addition to the aforementioned industrial Ethernet input/output components, there are other distributed peripheral modules provided by manufacturers such as Siemens, Wago, Phoenix, and Pilz.
Input/output modules can have a modular or compact construction.
Input/output modules can then be installed freely.
It can also use the same modules as PROFIBUS (Process Fieldbus). A converter is required when connecting multiple industrial Ethernet users.
Connection Example
In industrial Ethernet, each component can be connected to any available port.
The configuration determines the association between the slave device and the controller.
Configuration Basics
The physical structure and logical addressing of Industrial Ethernet must be configured using project-based settings via configuration software, and the configuration results are then transmitted to the relevant control system (controller). Only in this way can communication be achieved via Industrial Ethernet. The following software can be used for this purpose:
WorkVisual: Used for project-based configuration of the coupling between industrial Ethernet and KRC4 control cabinet.
Siemens STEP7: For project-based configuration of industrial Ethernet coupling with KRC2ed05 control cabinet
Logical addressing
To ensure clear addressing and identification, separate parameters (except for MAC addresses) must be set up and published for each industrial Ethernet user.
Equipment Name
Within the framework of Industrial Ethernet, device names are only allowed to be assigned once.
In this way, the module can be clearly identified during data exchange.
Equipment Number
Equipment numbering is necessary for module coupling or decoupling, such as when changing tools.
IP address
Industrial Ethernet is built on the TCP/IP Ethernet protocol.
Therefore, each device must be assigned an IP address that matches the specific network conditions.
Subnet mask
It is used as a filter mask to filter network addresses from IP addresses.
MAC address
Each bus coupler has a fixed code.
During project-based operations, each device can be identified by its MAC address.
