6FX1120-2CA01

例如V存儲區(qū)的VW100（RAM）在EEPROM中有其獨占的對應(yīng)地址，數(shù)據(jù)在從EERPOM中寫到V存儲區(qū)中時，其目標(biāo)地址就是VW100。

數(shù)據(jù)可以用如下方式寫入EEPROM數(shù)據(jù)區(qū)：

在編程軟件Micro/WIN的Data Block（數(shù)據(jù)塊）中定義V數(shù)據(jù)區(qū)存儲單元的初始值，下載數(shù)據(jù)塊時，這些數(shù)值也被寫入到相應(yīng)的EEPROM單元中。 
用特殊存儲器SMB31、SMW32，用編程方法將V存儲區(qū)的數(shù)據(jù)寫入EEPROM 
在System Block（系統(tǒng)塊）中設(shè)置數(shù)據(jù)保持功能，可將MB0 - MB13的內(nèi)容在CPU斷電時自動寫入到EEPROM中

共有三種方式： 超級電容保持，后備電池保持，EEPROM保持。 其中~~~~~~~~~~~~~~~~~~~~~~~~~~~~
公司  名稱：廈門泰尼電氣有限公司
固定  電話：0592-6809819
聯(lián)  系  人：張亮
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

1、超級電容只能保存五六天，且超級電容存在于S7-200CPU中；

2、后備電池可保持大約200天左右，需要購買。

3、EEPROM可永久保持，但是EEPROM只可對系統(tǒng)設(shè)置的MB0-MB13最多14個字節(jié)掉電自動保持，V區(qū)需要保持到EEPROM中需要編程實現(xiàn)，若V區(qū)有一段初始化數(shù)據(jù)，則可以通過“數(shù)據(jù)塊”賦值并下載到PLC內(nèi)。

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