NI PXI-2530通道簧片繼電器多路復(fù)用器
品牌：NI
型號：NI PXI-2530通道簧片繼電器多路復(fù)用器
產(chǎn)品說明：模塊控制器
NI PXI-2530通道簧片繼電器多路復(fù)用器中文資料：
NI PXI-2530通道簧片繼電器多路復(fù)用器鑰匙開關(guān)所有350–374個(gè)CPU都有一個(gè)鑰匙開關(guān)；然而，某些版本的CPU固件不支持所有按鍵開關(guān)功能（請參閱本章前面的“確定CPU修訂級別”一節(jié)）。本節(jié)將介紹這些差異。注意，其中一些CPU上的按鍵開關(guān)標(biāo)記為on/RUN和OFF/STOP，而其他CPU上的僅標(biāo)記為on和OFF。NI PXI-2530無論標(biāo)記如何，所有這些按鍵開關(guān)的工作方式如下所述：閃存保護(hù)：此標(biāo)準(zhǔn)硬接線功能可用于防止未經(jīng)授權(quán)的人（無鑰匙的人）更改閃存。當(dāng)鑰匙開關(guān)處于ON位置時(shí)，閃存無法更改（寫入）。無論接下來的兩個(gè)可配置功能如何設(shè)置，此按鍵開關(guān)功能始終有效。運(yùn)行/停止（可配置）：此功能是在CPU固件7.0版中引入的。默認(rèn)情況下，它是禁用的。除非CPU配置屏幕上的R/S Switch：（R/S開關(guān)：）參數(shù)設(shè)置為Enabled（啟用），否則它不起作用。啟用此功能后，可通過將鑰匙開關(guān)轉(zhuǎn)到OFF來停止PLC，或通過將鑰匙切換到ON來啟動PLC運(yùn)行（如果沒有故障）。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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