NI PXI-6143 PXI多功能I/O模塊
品牌：NI
型號：NI PXI-6143 PXI多功能I/O模塊
產(chǎn)品說(shuō)明：模塊控制器
NI PXI-6143 PXI多功能I/O模塊中文資料：
NI PXI-6143 PXI多功能I/O模塊這兩個(gè)內置串行端口消除了CPU通過(guò)PLC背板訪(fǎng)問(wèn)串行端口的需要，從而提高了系統性能。這兩個(gè)端口支持SNP/SNP-X主協(xié)議和從協(xié)議（請參閱第5-13頁(yè)的“無(wú)中斷SNP協(xié)議”）、RTU從協(xié)議（固件版本8.0及更高版本）和串行I/O功能（固件版本8.0及更高），允許您創(chuàng )建自定義串行輸出。有關(guān)如何使用這些端口的說(shuō)明，NI PXI-6143請參閱GFK-0582C或更高版本的Series 90 PLC串行通信用戶(hù)手冊。浮點(diǎn)數學(xué)所有Series 90-30 CPU都可以使用整數。（整數集由所有正整數和負整數組成，包括零。）浮點(diǎn)數學(xué)功能使CPU能夠處理除整數之外的十進(jìn)制數。它還提供三角、對數、指數和弧度轉換功能。浮點(diǎn)數學(xué)也稱(chēng)為“實(shí)數”數學(xué)。由于內置了數學(xué)協(xié)處理器芯片，CPU352和CPU374始終具有基于硬件的浮點(diǎn)運算能力。NI PXI-6143
英文資料
These two builtin serial ports eliminate the need for the CPU to access serial ports across the PLC backplane, resulting in better system performance. These two ports support the SNP/SNP-X master and slave protocols (see “Breakfree SNP Protocol” on page 5-13.), RTU slave protocol (in Firmware Version 8.0 and later), and the Serial I/O feature (in Firmware Version 8.0 and later) that lets you create a custom serial output. Instructions on how to use these ports can be found in the Series 90 PLC Serial Communications User’s Manual, GFK-0582C or later. Floating-Point Math All Series 90-30 CPUs can work with integer numbers. (The set of integer numbers consists of all positive and negative whole numbers, including zero.) The floating-point math feature enables a CPU to work with decimal numbers in addition to integer numbers.It also provides trigonometric, logarithmic, exponential, and radian conversion functions. Floating-point math is also referred to as “real number” math. The CPU352 and CPU374 have always had hardware-based floating-point math capabilities due to the built-in math co-processor chip.NI PXI-6143
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