NI PXI-2530通道簧片继电器多路复用器
品牌：NI
型号：NI PXI-2530通道簧片继电器多路复用器
产品说明：模块控制器
NI PXI-2530通道簧片继电器多路复用器中文资料：
NI PXI-2530通道簧片继电器多路复用器钥匙开关所有350–374个CPU都有一个钥匙开关；然而，某些版本的CPU固件不支持所有按键开关功能（请参阅本章前面的“确定CPU修订级别”一节）。本节将介绍这些差异。注意，其中一些CPU上的按键开关标记为on/RUN和OFF/STOP，而其他CPU上的仅标记为on和OFF。NI PXI-2530无论标记如何，所有这些按键开关的工作方式如下所述：闪存保护：此标准硬接线功能可用于防止未经授权的人（无钥匙的人）更改闪存。当钥匙开关处于ON位置时，闪存无法更改（写入）。无论接下来的两个可配置功能如何设置，此按键开关功能始终有效。运行/停止（可配置）：此功能是在CPU固件7.0版中引入的。默认情况下，它是禁用的。除非CPU配置屏幕上的R/S Switch：（R/S开关：）参数设置为Enabled（启用），否则它不起作用。启用此功能后，可通过将钥匙开关转到OFF来停止PLC，或通过将钥匙切换到ON来启动PLC运行（如果没有故障）。NI PXI-2530
英文资料
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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