NI PXI-2530通道簧片繼電器多路復用器
品牌：NI
型號：NI PXI-2530通道簧片繼電器多路復用器
產(chǎn)品說(shuō)明：模塊控制器
NI PXI-2530通道簧片繼電器多路復用器中文資料：
NI PXI-2530通道簧片繼電器多路復用器鑰匙開(kāi)關(guān)所有350–374個(gè)CPU都有一個(gè)鑰匙開(kāi)關(guān)；然而，某些版本的CPU固件不支持所有按鍵開(kāi)關(guān)功能（請參閱本章前面的“確定CPU修訂級別”一節）。本節將介紹這些差異。注意，其中一些CPU上的按鍵開(kāi)關(guān)標記為on/RUN和OFF/STOP，而其他CPU上的僅標記為on和OFF。NI PXI-2530無(wú)論標記如何，所有這些按鍵開(kāi)關(guān)的工作方式如下所述：閃存保護：此標準硬接線(xiàn)功能可用于防止未經(jīng)授權的人（無(wú)鑰匙的人）更改閃存。當鑰匙開(kāi)關(guān)處于ON位置時(shí)，閃存無(wú)法更改（寫(xiě)入）。無(wú)論接下來(lái)的兩個(gè)可配置功能如何設置，此按鍵開(kāi)關(guān)功能始終有效。運行/停止（可配置）：此功能是在CPU固件7.0版中引入的。默認情況下，它是禁用的。除非CPU配置屏幕上的R/S Switch：（R/S開(kāi)關(guān)：）參數設置為Enabled（啟用），否則它不起作用。啟用此功能后，可通過(guò)將鑰匙開(kāi)關(guān)轉到OFF來(lái)停止PLC，或通過(guò)將鑰匙切換到ON來(lái)啟動(dòng)PLC運行（如果沒(méi)有故障）。NI PXI-2530
英文資料
Keyswitch All 350 – 374 CPUs have a keyswitch; however, some versions of the CPU firmware do not support all of the keyswitch features (see the section “Determining CPU Revision Levels” earlier in this chapter). These differences are described in this section. Note that the keyswitches on some of these CPUs are labeled ON/RUN and OFF/STOP and on others are just labeled ON and OFF. Regardless of the labeling, all of these keyswitches work as described below:Flash Memory Protection: This standard, hard-wired feature can be used to prevent Flash memory from being changed by unauthorized people (people without a key). When the key switch is in the ON position, Flash memory cannot be changed (written to). This keyswitch feature will always be in effect, regardless of how the next two configurable features are set.Run/Stop (configurable): This feature was introduced in CPU firmware release 7.0. It is, by default, disabled. It is not functional unless the R/S Switch: parameter on the CPU configuration screen is set to Enabled. This feature, when enabled, lets you stop the PLC by turning the key switch to OFF, or start the PLC running by turning the key switch to ON (if there are no faults).NI PXI-2530
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