• 2021-05-26

6. From the scale of application objects: PLC is generally used in small automatic control places, such as the control of equipment or the control and interlocking of a small amount of analog quantity, while the large-scale applications are generally DCS. Of course, this concept is not accurate, but it is very intuitive. We are used to calling a system larger than 600 points a DCS, and a scale sma...

• 2021-05-25

3. From the database: DCS generally provides a unified database. In other words, once a piece of data exists in the database in the DCS system, it can be used in any situation. The following references, such as in the configuration software, in the monitoring software, in the trend chart, in the report... and the database of the PLC system is usually not unified. Configuration software, monitoring...

• 2021-05-24

Up to now, there is no strict boundary between DCS and PLC. In the eyes of most people, the large system is DCS, and the small system is called PLC. Of course, it's not impossible to say that, but it's not right. Now let's re-establish this concept. 1. From the perspective of development: DCS evolved from the traditional dashboard monitoring system. Therefore, DCS is inherently more focused on the...

• 2021-05-21

PLC (Programmable Logic Controller) has been invented in 1968, after more than 40 years of development, it is already a very mature controller. According to the estimates of research institutions, more than 70% of PLC applications are below 128 points and are purely digital I/O, and engineers only need to use digital I/O, a small amount of analog I/O, and simple programming skills. 80% of industri...

• 2021-05-20

Honeywell Honeywell STD800 is a high-performance differential pressure transmitter using advanced sensor technology. STD800 combines differential pressure with static pressure and temperature compensation on the sensor chip to provide extremely high measurement accuracy and stability under a wide range of static pressure and temperature. The SmartLine series has also been fully tested and meets th...

• 2021-05-19

The Ovation system is a model that integrates process control and enterprise management information technology with the most advanced computer and communication technology in the world today. It uses a high-speed, high-reliability, and high-open communication network, and has multi- task and multi-data acquisition control capabilities. The Ovation system uses the latest distributed, global-re...

• 2021-05-18

Yokogawa AXF electromagnetic flowmeter has a replaceable electrode and a diagnosis function for electrode contamination, which is very easy to maintain. Moreover, AXF adopts a dual-frequency excitation method (applicable for pipe diameters less than 400mm/16in), which greatly reduces fluid noise . In addition, the optional enhanced dual-frequency excitation method is suitable for more demandi...

• 2021-05-17

As the world's leading electronic and electrical engineering company, SIEMENS attaches great importance to procurement and plays a pivotal role in the global procurement market. SIEMENS purchases approximately more than 11 billion euros each year. Most of the current sources of procurement are still in Europe. But in recent years, this situation has begun to change a lot. SIEMENS's procuremen...