SE4001S2T2B1 Emerson DeltaV输入输出模块 DCS卡件

SE4001S2T2B1 Emerson DeltaV输入输出模块 DCS卡件

SE4001S2T2B1 Emerson DeltaV输入输出模块 DCS卡件

CCPP涉及煤气、蒸汽和发电机组，都是对安全要求极高的设备。稍有不慎，轻则会出现机组退出，严重者会出现爆炸事故。来不得半点马虎。为此，针对CCPP这样的工艺特点，在下载前，必须做好充分的事故应急预案工作，制订切实有效的安全防范措施

如将该控制器控制的所有重要运行设备，如运行允许全部切换为就地运行，所有通讯点进行隔离，并将与其对应控制器有联锁关系点和不同控制器机柜的硬接线点强制，防止新旧程序在下装瞬间，回到执行状态时的初始扫描过程中，软件初始值引起失控状态值输出，导致设备误动作。

程序下装工作尽量选择在机组停运期间，采用相对安全的增量下装方式，少用全下装。总之，现场调试时的程序下装思维不能照搬照抄到生产运行中，因为现场调试属于模拟运行，而生产过程中是带负荷运行。    

CCPP involves gas, steam and generator sets, all of which have high safety requirements. A little careless, light will appear unit exit, serious will appear explosion accident. There must be no carelessness. To this end, in view of the process characteristics of CCPP, before downloading, it is necessary to do a full accident emergency plan work and formulate effective safety precautions

For example, all the important operating devices controlled by the controller, such as the operation allows all to be switched to local operation, all communication points are isolated, and the interlocking relationship points of its corresponding controller and the hard wiring points of different controller cabinets are forced to prevent the initial value of the software from causing out-of-control status value output during the initial scanning process when the new and old programs return to the execution state at the moment of installation. The device works incorrectly.

Procedure downloading work as far as possible to choose during the unit outage, the use of relatively safe incremental downloading method, less full downloading. In short, the program installation thinking during field debugging cannot be copied to the production operation, because the field debugging belongs to the simulation operation, and the production process is run with load.