Description
3706A Safety Instrumented System (SIS)
3706A Safety Instrumented System (SIS)
Module Clips Drive controller servo motor
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Application of IO Link in Industrial Automation
This article mainly introduces the overall solution of ST IO Link communication master station used in industrial systems, including the following 5 aspects:
Firstly, the application of IO Link in industrial automation; The second is the introduction of ST IO Link main station transceiver; The third is the introduction of our ST”s IO Link main site evaluation board; The fourth is an introduction to the reference design scheme of the IO Link main station; The fifth is a demonstration of the IO Link master station reference design.
The industrial automation system can be said to be composed of many levels. The top level is usually industrial Ethernet to transmit data to the upper control center or monitoring center of the factory, while the middle layer is usually some PLC system for specialized process processing, such as controlling a specialized assembly line or production line. At the bottom, there are usually many industrial sensors, such as temperature sensors, pressure sensors, flow sensors, or proximity sensors, as well as some actuators, such as valves, moving lights, relays, or contactors, which are used for collecting and controlling physical quantities.
Between these levels, there will also be some modules or gateways for conversion and processing work. Therefore, in traditional industrial systems, there are many different level standards and communication protocols on site, resulting in poor modularity and versatility. Because there are both analog signals on site, such as a 4 to 20 mA current loop and analog voltage signals, as well as digital signals. In such an environment, analog signals are particularly susceptible to interference from harsh on-site environments. At the same time, sensors or actuators for analog transmission cannot perform on-site remote configuration or calibration 3706A Safety Instrumented System (SIS) diagnosis work. In order to solve the transmission of the last segment of data to sensors and actuators in industrial field environments, as described earlier, we have introduced a specialized digital interface IO Link to achieve fully digital transmission between the interface modules of sensors and industrial field buses. The bidirectional data transmission makes it possible to parameterize the interaction of on-site data, diagnose and transmit information. By using this technology, remote condition monitoring and predictable maintenance of terminal equipment can be achieved, thereby effectively alleviating the problem of production line downtime.
Its advantages include:3706A Safety Instrumented System (SIS)
Firstly, whether it is a pure digital sensor, an analog sensor after digital quantization, or different types of actuators, unified access can be achieved, thus achieving a simplified and standardized system architecture. Secondly, the transmission of digital signals will have stronger anti-interference ability than the transmission of analog signals, so the reliability of the system will also be stronger. Thirdly, through the bidirectional transmission of digital signals, more intelligent and advanced actuators or sensors can be used, making it easier to achieve status monitoring and system diagnostic protection functions. In this way, any issues and status of the production line can be monitored and maintained in real-time, ensuring the reliability, maintainability, and upgradability of the entire production line, thereby ensuring the minimum downtime.
The following is the specific content about IO Link technology
Firstly, the definition of the IO LINK standard enables data transmission, processing, configuration, and diagnostic information exchange between sensors or actuators and control systems. Secondly, this is a simple peer-to-peer communication architecture, where a master port is connected to a device port. Then, it can achieve compatibility with existing communication architectures, such as reusing cables and interfaces. At the same time, the IO Link system also has backward compatibility upgrade capability, as the master end of the system uses digital binary serial communication to interact with devices, and vice versa.
It can be said that IO link makes the system simpler:
Firstly, this is a universal standard communication method that complies with IEC61131-9. Secondly, IO Link is an intelligent communication system that solves the digital information exchange and transmission of the last distance from the control host to the terminal device. Thirdly, IO Link is simple to use and can be said to be plug and play, compatible with some existing system devices.
Some related products and solutions provided by ST in IO Link communication solutions
Firstly, in this communication system, the IO Link Master, which connects to the upper computer controller, is one of the main key solutions that will be mentioned later. Secondly, ST can provide some communication chips on the IO Link Master project, such as L6360. On the other side of the sensor or actuator end, namely the IO Link Slave end, ST can provide communication chips L6362A and L6364 on this IO Link Slave slave project. According to standards, this three-wire point-to-point communication method is easily compatible with some existing sensor actuators” standard ports, such as M12 standard industrial connectors and M12 standard connector wires. In addition, its advantages include the ability to achieve point-to-point bidirectional signal transmission within a single cable, as well as the general power supply requirements of the master end to the sensor actuator. According to the general requirements of the current industry, the maximum length of this cable is 20 meters, and the three wires inside are 24V, 0V, and data cables. The L+of this chip can support up to 500 milliamperes. If greater current is needed, there are also other L+drivers, including Load Switch IPS and other products, which can provide greater current or can be applied externally. The IO Link communication speed can generally reach a baud rate of 230.4K per COM3, and it also has functions such as status indication and detection.
For some specific application characteristics of IO Link, the communication transceiver system composed of L6360 and L6362A can support three standard data types of IO Link, namely COM1 (4.8k), COM2 (38.4K), and COM3 (230.4K) modes. This communication system can meet the requirements of all modern standards, industrial sensors, and actuators: firstly, it can quickly and very easily configure or reconfigure sensors or actuators. Secondly, it can be widely applied to various standardized sensors or systems that execute information. Thirdly, as a digital communication system, compared to traditional analog signal transmission systems, it can reduce power consumption and improve system efficiency. Fourthly, it has complete diagnostic and protection functions, which can improve the reliability of related systems. Therefore, it can be widely used to drive various digital sensors and actuators, as well as input and output modules of PLC, in order to achieve and meet various requirements of Industry 4.0.
How to Determine the Interference Problem of PROFINET IO Communication
Preliminary Diagnosis of PROFINET Interference Problems
1. Overview
When debugging PROFINET IO communication, it is common to encounter communication failures. One of the reasons for communication failures is interference. PROFINET IO communication equipment often operates in complex industrial electromagnetic environments, and incorrect shielding grounding or non-standard installation may lead to communication interference problems. Since optical signals are not affected by electromagnetic interference, this article only introduces interference problems with electrical signals.
2. How to determine interference issues
If PROFINET IO communication is affected by electromagnetic interference, a simple judgment can generally be made through the following aspects:
2.1. Judging the communication status through PROFINET IO
If the following communication phenomena are found during PROFINET IO communication debugging or operation, it may be affected by electromagnetic interference:
① Occasionally, communication is interrupted and restored.
② When certain on-site devices or specific operations are turned on, communication is interrupted, and on the contrary, communication returns to normal.
2.2. By using STEP7 online diagnostic information to determine and view the diagnostic buffer information of the IO controller, how to detect the presence of frequent communication failures and recovery information between the IO controller and IO devices in the diagnostic buffer, as shown in the following figure, may be affected by electromagnetic interference:
14 STEP7 Device Diagnostic Buffer Information
3. How to troubleshoot and solve interference problems
If a suspected electromagnetic interference causing PROFINET IO communication failure is found, how should we troubleshoot and solve it? The following will be introduced from the following aspects:
3.1 Increase PROFINET IO communication watchdog time
Due to PROFINET IO communication failure occurring during watchdog time, the IO controller did not provide input or output data (IO data) to the IO device, and watchdog time=the number of update cycles allowed for IO data loss × The refresh time is usually automatically calculated and allocated by the IO controller. This time value is generally small. If electromagnetic interference is encountered, the probability of communication failure occurring within the automatically calculated watchdog time will increase. At this time, we can appropriately increase the PROFINET IO communication refresh time or the number of update cycles allowed for IO data loss to increase the watchdog time. However, this method may not solve serious electromagnetic interference problems, and it is recommended to eliminate and solve them through subsequent methods.
What IO combinations can a mini PLC combine with to achieve automated control?
At present, there are two main design modes for controllers like PLC, one is integrated design and the other is modular design. From the name, we can feel that there are two different PLCs, one that cannot be disassembled and the other that can be disassembled. Due to the fact that the main control module and IO module of the modular PLC can be spliced as needed, its volume and weight are usually very small, and we cannot call it a mini PLC too much. So, what IO combinations can such a small gadget combine with to achieve automation control? Let”s take a brief inventory:3706A Safety Instrumented System (SIS)
1. Firstly, there is the digital quantity acquisition IO module, which is used to collect digital quantity information. Typical examples include counter IO, PNP type digital quantity acquisition IO, NPN type digital quantity acquisition IO, etc.
2. Then there is the digital output IO module, which is used to send digital instructions. The most typical example is PWM output IO, which can output pulse signals to control servo motors or stepper motors for operation.
3. After talking about digital IO, let”s talk about analog IO. Analog signal acquisition type IO includes voltage signal acquisition, current signal acquisition, and temperature signal acquisition. The IO for collecting temperature signals includes PT100, PT1000, and various thermocouple temperature acquisition modules.
4. Finally, there are analog output IO, as well as output current signals and voltage signals.
In addition to the above IO modules, our modular PLC also supports extended communication interfaces, further enhancing the equipment”s scalability.
Module Input/Output (I/O) Knowledge3706A Safety Instrumented System (SIS)
Module Input/Output (I/O) Knowledge
I think it”s necessary to talk about the sorting of the input and output ports of the module. Generally, we can divide it into IO functional division and IO specifications.
The purpose of the former is mainly to convert all functions into actual division into MCU IO ports, while the purpose of the latter is to determine the specifications of all IO ports. Of course, you can completely skip these tasks, and it”s also possible. Depending on the company”s requirements, I think individuals still consider them as a work habit.
The following examples are all created for my blog post. If there are any duplicate names, please do not contact me.
Looking at the above figure, first determine all input and output functions and power input, as well as communication.
Then separate the power distribution with different lines, and start organizing each power supply line and processing process. The final purpose of the entire diagram is to clearly allocate the input and output sequence.
The IO specification is to provide a detailed description of all interfaces, crystal oscillators, and other information to the MCU.
1. Enter the number of low effective interfaces and how much pull-up resistance (switch wet current) is required (how much current does the microcontroller need to absorb, which may be injected into the microcontroller after pull-up).
2. Enter the number of highly effective interfaces, how many pull-down resistors are required (switch wet current), (how much current does the microcontroller need to absorb, and it is possible to inject the microcontroller after the switch is effective)
3. Number of analog input interfaces, evaluate whether the analog ports of the microcontroller are sufficient, and confirm the required analog conversion accuracy. Evaluate whether the A/D conversion reference voltage needs to be replaced (to meet accuracy requirements). Consider how many power supplies need to be tested and how many analog input ports are configured.
4. Evaluate the requirements for crystal oscillator accuracy and whether a phase-locked loop is required.
The above requirements are mainly aimed at module design and need to be confirmed during the early development of the module. All requirements can be organized using an Excel table and displayed in the diagram.
Distributed dual Ethernet IO module
The distributed dual Ethernet IO module adopts an industrial grade design, which meets the demanding industrial application scenarios. It is equipped with a dedicated high-performance Ethernet chip, which can quickly achieve cascade networking between IO modules without the need for repeated wiring, saving on-site wiring costs.
The distributed dual Ethernet IO module comes with switch input, switch output, relay output, analog input, analog input, thermal resistance input, etc. It supports high-speed pulse input counting and high-speed pulse output, and is designed specifically for industrial field data collection, measurement, and control. The distributed dual Ethernet IO module supports Modbus TCP protocol and Modbus RTU protocol for uplink, which can quickly connect to existing DCS, SCADA, PLC, HMI and other systems. The distributed dual Ethernet IO module supports one RS485 interface and supports Modbus RTU Master function. It can expand the IO module, read and write intelligent instrument data, or connect to HMI, DCS, PLC and other devices as a Modbus Slave.
Application of Data Acquisition IO Module in Thermal Power Plant System3706A Safety Instrumented System (SIS)
The Ethernet IO module is a data acquisition and control device. It uses Ethernet as a communication method to transmit data from various industrial control sensors and actuators to computers or other devices for management and monitoring. As a modern energy supply base, thermal power plants need to widely apply various intelligent control technologies to improve operational efficiency, reduce costs, and improve safety. In this context, the application of barium rhenium Ethernet IO modules is particularly important.
In the application of thermal power plants, the main function of the barium rhenium Ethernet IO module is to achieve real-time monitoring and control of the production process. By connecting to various sensors and actuators, the barium rhenium Ethernet IO module can collect real-time environmental parameters, machine operation status, and other data of the thermal power plant. By analyzing and processing these data, commanders can understand the operation of the thermal power plant and make corresponding adjustments. Compared to traditional automatic control systems, the barium rhenium Ethernet IO module has the advantages of stronger flexibility, faster reaction speed, and higher accuracy, which can greatly improve the operational efficiency and reliability of thermal power plants.
The real-time monitoring and control of thermal power plants require many capabilities of barium rhenium Ethernet IO modules. Here are several common application scenarios:
Firstly, the barium rhenium module can monitor parameters such as gas flow and water flow in thermal power plants. These parameters are crucial for ensuring the normal operation of the thermal power plant. Once these parameters undergo abnormal changes, the DO channel can be connected to the barium rhenium Ethernet IO module, and the alarm signal will immediately sound to remind the command personnel to handle it. Meanwhile, due to the fact that the barium rhenium Ethernet IO module can collect these data in real-time and transmit it to the monitoring system for recording, it can provide better technical support for quality management in thermal power plants.
Secondly, the barium rhenium Ethernet IO module can also monitor the operating status of mechanical equipment in thermal power plants. This includes parameters such as temperature, pressure, vibration, etc. By monitoring and analyzing these parameters, the barium rhenium Ethernet IO module can detect machine equipment faults in a timely manner, thereby avoiding the expansion of losses. In addition, during machine equipment maintenance, historical data recorded by the barium rhenium Ethernet IO module can be used to develop more scientific and reasonable maintenance plans, reduce maintenance costs, and improve maintenance efficiency.
Finally, the barium rhenium Ethernet IO module can also help thermal power plants achieve distributed control. We can remotely control and monitor multiple areas of the thermal power plant by connecting multiple barium rhenium modules to a network. This not only reduces the on-site debugging of equipment, but also strengthens the evaluation of equipment reliability.
In summary, the barium rhenium Ethernet IO module has unique advantages in real-time monitoring and control of thermal power plants. It can help command personnel monitor machine data in real-time, discover abnormal information, take timely measures to avoid impacts, and improve production efficiency and safety.
Remote IO modules based on Ethernet communication are widely used in the field of industrial IoT
With the development of IIOT (Industrial IOT) industrial Internet of Things technology, many traditional assets need to be connected to the internet to achieve unified data collection, analysis, processing, and storage, breaking the traditional phenomenon of device information silos. Therefore, the MQTT Ethernet IO acquisition module M160T, which supports the Internet of Things protocol, is able to unleash its potential by being compatible with existing devices and able to connect to IoT platforms. The MQTT Ethernet IO acquisition module will be widely used in industrial IoT, such as smart property, smart parks, smart factories, smart transportation, smart water conservancy, smart agriculture, smart campuses, smart communities, smart distribution, smart water conservancy, and many other industries.
Ethernet communication technology is a mature communication technology that has been widely applied. Therefore, Ethernet communication is the first choice for enterprises to connect various assets to the Internet of Things platform. Its reasons are stable and reliable, mature technology, fast transmission speed, and fast construction wiring.3706A Safety Instrumented System (SIS)
For traditional various assets, such as low-voltage distribution rooms, air compressor rooms, property and living pump rooms, street light control, liquid level collection, temperature and humidity collection, etc., through the MQTT Ethernet IO collection module, they can be quickly connected to the Internet of Things platform.
So, what characteristics do MQTT Ethernet IO modules need to have when used in IoT solutions? The details are as follows:
1. Actively connect to cloud platforms:
Based on the characteristics of Ethernet communication networking, the Ethernet IO acquisition module must support the TCP Client function, which is not only the TCP client function, so that the Ethernet IO module can actively connect to the IoT platform without the need for complex settings such as peanut shells;
2. Compatible with existing systems:
Support TCP Server and Modbus TCP protocol functions, which can be compatible with traditional upper computer systems or device access of HMI”s TCP client;
3. Access to IoT platforms:
Supports standard MQTT protocol and Modbus TCP protocol, and can be connected to various MQTT protocol IoT platforms such as Huawei Cloud and Alibaba Cloud, or traditional SCADA and DCS systems;
4. Rich IO interfaces and scalability:
There are various types of data to be collected on site, and it is necessary to support the collection of various devices such as 4-20Ma, RS485, DI, DO, etc. At the same time, it is also necessary to have the ability to read RS485 device instrument data or expand the functions of the IO acquisition module;
5. Easy installation method:
The volume of the control box is very limited, so it is necessary to use directly inserted and unplugged wiring terminals, as well as a rail installation method.
6. Industrial grade design
The industrial environment is harsh, and the Ethernet IO module must adopt an industrial grade design to ensure continuous and stable operation in harsh environments.
Through the MQTT Ethernet IO acquisition module, there is no need to replace various existing enterprise assets and the digital transformation of accessing IoT platforms can be quickly achieved. Therefore, the MQTT Ethernet IO acquisition module will be widely used in industrial IoT, such as smart properties, smart parks, smart factories, smart transportation, smart water conservancy, smart agriculture, smart campuses, smart communities, smart power distribution, smart water conservancy, and many other industries.
What are the advantages of Ethernet remote IO modules that can be cascaded?
Advantages and specific application scenarios of Ethernet remote IO modules that can be cascaded
For scenarios where data collection control points are linearly distributed, such as streetlights, bridges, streetlights, digital factories, parking lot parking monitoring, smart parking lots, smart parking racks, and building automation control systems in smart parks, using cascading dual Ethernet remote IO modules saves more costs than using single Ethernet remote IO modules.
The Ethernet remote IO module that can be cascaded is a new type of Ethernet remote IO module that supports MAC layer data exchange and can achieve hand in hand connection. This not only saves switch interfaces, but also reduces a large amount of Ethernet cable costs, wiring space, and wiring costs.
Its advantages are as follows:3706A Safety Instrumented System (SIS)
1. No need for a large number of Ethernet switches or occupying Ethernet switch ports;
2. It can save a lot of Ethernet cables, cable space, and labor costs for installing cables;
3. The overall cost has significantly decreased;
4. Supports both Modbus RTU protocol, Modbus TCP protocol, and the Internet of Things protocol MQTT protocol;
5. Support TCP Server and TCP Client services;3706A Safety Instrumented System (SIS)
6. Can be connected to SCADA systems, PLC systems, or cloud platforms;
7. The series uses a MAC layer for data exchange, ensuring that network connectivity does not cause communication issues with subsequent devices due to device failures in the middle.
The comparison between cascaded Ethernet remote IO modules and traditional IO modules used in building automation systems is shown in the following figure:
1. Adopting a cascaded dual Ethernet remote IO module, data acquisition and control wiring for floors with a height of 70 meters only requires a 70 meter Ethernet cable;
2. Using a traditional single Ethernet remote IO module, the data acquisition and control system wiring for a 70 meter high floor requires a 280 meter Ethernet cable.
It can be seen that using cascaded dual Ethernet remote IO modules can save a lot of wiring costs compared to traditional single Ethernet remote IO modules.
Application of Ethernet Remote IO Module in Building Automation System
For building automation systems, each data acquisition control point is linearly distributed in each floor. Therefore, it is very suitable to use Ethernet remote IO modules that can be cascaded to achieve data acquisition and control.
The Ethernet remote IO module that can be cascaded supports MAC layer data exchange and can achieve a hand in hand connection method. This can not only save switch interfaces, but also reduce a large amount of Ethernet cable costs, wiring space, and wiring costs.
Its advantages are as follows:
1. No need for a large number of Ethernet switches or occupying Ethernet switch ports;
2. It can save a lot of Ethernet cables, cable space, and labor costs for installing cables;
3. The overall cost has significantly decreased;
4. The M160E supports both Modbus RTU protocol, Modbus TCP protocol, and the Internet of Things protocol MQTT protocol. In addition, it also supports TCP Server and TCP Client services; Can be connected to SCADA systems, PLC systems, or cloud platforms;
4. The M160E series uses a MAC layer for data exchange, ensuring that network connectivity does not cause communication issues with subsequent devices due to device failures in the middle.
Comparison between cascaded Ethernet remote IO modules and traditional IO modules for building automation systems:
1. Adopting a cascaded dual Ethernet remote IO module, data acquisition and control wiring for floors with a height of 70 meters only requires a 70 meter Ethernet cable;
2. Using a traditional single Ethernet remote IO module, the data acquisition and control system wiring for a 70 meter high floor requires a 280 meter Ethernet cable.
Therefore, we can conclude that for scenarios where data collection control points are linearly distributed, such as streetlights, bridges, streetlights, digital factories, parking lot parking monitoring, smart parking lots, smart parking racks, and building automation systems in smart parks, using cascading dual Ethernet remote IO modules saves more costs than using single Ethernet remote IO modules.
1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
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