Programmable automation controller PAC characteristics and advantages in the field of industrial control

PAC is now the biggest application fields is still locked, control and real-time data from factories can make management has more abundant information resources, so that to make decisions, but you want to install system can provide the factory data may be quite difficult. Enterprise systems usually through ODBC, ADO and standards such as XML input data from the automation system. PLC is by OPC standard such as providing communication ability, that is to say, have to join the PC to using OPC to obtain data, and using the ODBC, ADO and ilL will feedback the data to the enterprise standard. And PAC can effectively integrating factory data to ERP system, the control system can directly and external database communication. And when the control system connected to the database and web sites, security problems began to emerge. In order to obtain the highest security, many manufacturers choose not to connect the automation system and the enterprise. But generally speaking, the connection is far more than the advantages of safety, while PLC can protect it from the factory of the intruder and steal, difficult to fight but PLC with Ethernet connection unprotected packet as the target of hackers. PAC can transmit data using network coding, and protect the information. Although this in today may not be the focus of attention, but in the future, it may be the main factors influencing the PAC in the factory. Multi-use of cost savings. In the context of cost allocation, in small digital control applications, the controller's price can be more expensive than VO module. For these applications, a control only digital VO line of miniature PLC is likely to be the ideal solution. However, if the system need to visual or instrument control, must be for these functions in addition to purchase independent controller. PLC controller is not in order to simulate the argument o instrument control for high speed or visual application designed for high-speed data transmission speed, therefore PLC without visual or instrument control module must be configured for these applications independent controller, to improve the cost. And will look to the status of the PAC, a controller and frame can deal with digital and analog VO, action, visualization, and instruments, thus saving some of the cost of the controller, when control system requires multiple functions, PAC compared with lowest cost. In factories, vibration is often the cause of the PC freezes, the PLC forte, most of the PLC is to use NEMA encapsulation. In such an environment, have additional cooling design, solid shell, strengthen the vibration and impact specifications P tear platforms can provide similar to the reliability of PLC, but such PXI platform unable to configure the hard disk, memory and used to replace, to avoid the vibration caused by the instability. At present, there are even vendor software will burn in the FPGA to replace the hard disk, so the equipment can be completely run out of PAC, enhance stability. At present, the automation control in terms of equipment upgrade or change of elasticity is also fairly valued, when firms change gear flexibility of automation function to meet changing customer requirements, hope to be able to launch modular and flexible and scalable control system. Although in the argument o use restrictions on Numbers and operation, the PLC system also has the scalability, but even if want to join the visual, instrument control or high-speed analog functions, the PAC system still has extensibility. A number of PC can be through the Ethernet connection, and in accordance with the requirements to extend up and down. But when replacement, factory engineers must limit shutdown time to a minimum. When the control system must be upgraded, or to replace the VO module must be able to replace or join a module in the shortest possible time. The modular nature of the PLC to achieve this goal. Ability to store and digital simulation capability. Storage capacity is one of the PAC relative to the advantage of PLC, the function of traditional PLC controller only, no built-in hard disk or Flash, and PAC is regarded as an extension of the PC, so Storage configuration is considered to be one of the standard already, so when using PAC can decide when and how to record the data, and what format for data collection, summary, and analysis. For the need to use high-speed applications (mass storage Machine condition monitoring, for example) , it is important to have high speed processor and mass storage. Because PAC system is using existing hardware on the market, so the PAC controller can use Pentium 4 processor with 1 gb of memory. In the processing of digital and analog, traditional PLC is only able to correct voltage and current sensors and actuators for industry provide digital argument 0 platform. But the new module provides 24 v digital VO, up to five up mA current driver and optical isolation, at the same time also offer a variety of functions, such as watchdog, 监管机构) Timer can be programmed operation state and the input filter, in order to improve the security and stability, the price can be as low as $5 each passage. Traditionally, the simulation argument o has been the strong item of PC platform, is largely due to the speed of the PCI bus. Now some PLC VO provide simulation module, but quite a trouble when set up, and there is no high resolution and data flow capacity, the PAC provides the analog input speed of up to 200 million samples per second, resolution up to 24 bits.