<p class="STYLE8">å¯ä»¥éæ©å å«æ声æåéçç¹å®å°ååºåï¼å¯ä»¥è®¿é®å®½ä¸º 1 ä½ã8 ä½ã16 ä½æ 32 ä½çåºåï¼è¿ç§è®¿é®ç±»å称ä¹ä¸º“<a href="https://www.xuezdh.com/tag/%e7%89%87%e6%ae%b5%e8%ae%bf%e9%97%ae/" title="æ¥çä¸ çæ®µè®¿é® ç¸å ³çæç« " target="_blank"><span class="tag-key">ç段访é®</span></a>”ï¼<a href="https://www.xuezdh.com/tag/slice/" title="æ¥çä¸ Slice ç¸å ³çæç« " target="_blank"><span class="tag-key">Slice</span></a> accessï¼ã</p>
<p class="STYLE8">éè¿ sliceï¼ç段访é®ï¼æ¹å¼ï¼å¯ä»¥éæ©æ声æåéä¸çç¹å®å¯»ååºåï¼å¯ä»¥å®ç°ä»å个ä½å°åé级å«ç符å·è®¿é®ï¼ç段访é®ä¸è½å¯»å常éã</p>
<p class="STYLE8">slice æ¹å¼æ¯æè¿2ç§æ¹å¼çåï¼å¯æ å访é®çåãå¯ä¼å访é®çåã</p>
<h3>1. è¯æ³è¡¨è¾¾</h3>
<p class="STYLE8">ä¸åè¯æ³ç¨äºå¯»åï¼</p>
<p class="STYLE8">1. <;Tag>;.x<;Bit number>;</p>
<p class="STYLE8">2. <;Tag>;.b<;BYTE number>;</p>
<p class="STYLE8">3. <;Tag>;.w<;WORD number>;</p>
<p class="STYLE8">4. <;Tag>;.d<;DWORD number>;</p>
<p class="STYLE8">è¯æ³è¯´æ</p>
<table border="1" width="100%">
<tbody>
<tr>
<td width="25%">é¨å</td>
<td width="75%">说æ</td>
</tr>
<tr>
<td><;Tag>;</td>
<td>访é®çåéæ è¯ã</td>
</tr>
<tr>
<td>x<br data-filtered="filtered" />b<br data-filtered="filtered" />w<br data-filtered="filtered" />d</td>
<td>访é®å®½åº¦ä¸º“ä½ï¼1 ä½ï¼”çæ è¯<br data-filtered="filtered" />访é®å®½åº¦ä¸º“åèï¼8 ä½ï¼”çæ è¯<br data-filtered="filtered" />访é®å®½åº¦ä¸º“åï¼16 ä½ï¼”çæ è¯<br data-filtered="filtered" />访é®å®½åº¦ä¸º“ååï¼32 ä½ï¼”çæ è¯</td>
</tr>
<tr>
<td><;BIT number>;</td>
<td>å¾ è®¿é® <;tag>; å çä½å·ã ç¼å· 0 表示访é®æä½ææä½ã</td>
</tr>
<tr>
<td><;BYTE number>;</td>
<td>å¾ è®¿é® <;tag>; å çåèå·ãç¼å· 0 表示访é®æä½ææåèã</td>
</tr>
<tr>
<td><;WORD number>;</td>
<td>访é®ç <;tag>; å çåå·ãç¼å· 0 表示访é®æä½ææåã</td>
</tr>
<tr>
<td><;DWORD number>;</td>
<td>访é®ç <;tag>; å çååå·ãç¼å· 0 表示访é®æä½ææååã</td>
</tr>
</tbody>
</table>
<p>é常é对ByteãWordçæ°æ®ç±»åçåéè¿è¡ç段访é®ï¼å¦ä¸å¾æ示ï¼æ¤å¤ä¹å¯ä»¥å¯¹ INTãDINT çæ´æ°æ°æ®ç±»åçåéè¿è¡ç段访é®ã</p>
<p><img class="aligncenter size-full wp-image-1553" src="https://www.xuezdh.com/wp-content/uploads/2021/03/slice-01-1.jpg" alt="" width="900" height="383" /></p>
<h3>2. 使ç¨è¯´æ</h3>
<p><strong>1. ä½¿ç¨ DB ååéè¿è¡ <a href="https://www.xuezdh.com/tag/slice/" title="æ¥çä¸ Slice ç¸å ³çæç« " target="_blank"><span class="tag-key">Slice</span></a> 访é®</strong></p>
<p>å建ä¸ä¸ª <a href="https://www.xuezdh.com/tag/s7-1200/" title="æ¥çä¸ S7-1200 ç¸å ³çæç« " target="_blank"><span class="tag-key">S7-1200</span></a> ç项ç®ï¼å¨ç¨åºåä¸æ°å»ºä¸ä¸ª DB åï¼ä¼åçå访é®ï¼ï¼å建ä¸ä¸ªåéï¼æ°æ®ç±»å为 DWordï¼å¯ä»¥çå°è¯¥åé没æç»å¯¹å°åï¼å¦ä¸å¾æ示ã</p>
<p><img class="aligncenter wp-image-1548 size-full" src="https://www.xuezdh.com/wp-content/uploads/2021/03/slice-02.jpg" alt="å建 DB ååé" width="600" height="324" /></p>
<p class="STYLE8">å¨ç¨åºæ®µ 1 ä¸æå ¥å¸¸å¼åèµå¼æ令ï¼å¸¸å¼æ令填åå°å“DB1.Static_1.X0”ï¼èµå¼æ令填åå°å“DB1.Static_1.X1”ï¼å ¶ä¸ X0 å X1 åå«è¡¨ç¤ºåé Static_1 ç第 0 ä½å第 1 ä½ï¼å¦ä¸å¾æ示ã</p>
<p><img class="aligncenter wp-image-1549 size-full" src="https://www.xuezdh.com/wp-content/uploads/2021/03/slice-03.jpg" alt="对 DB ååéçä½è¿è¡ Slice 访é®" width="600" height="371" /></p>
<p>å¨ç¨åºæ®µ 2 ä¸æå ¥ MOVE æ令ï¼IN 管èå¡«åå°å“DB1.Static_1.B0”ï¼OUT 管èå¡«åå°å“DB1.Static_1.B1”ï¼å ¶ä¸ X0 å X1 åå«è¡¨ç¤ºåé Static_1 ç第 0 åèå第 1 åèï¼å¦ä¸å¾æ示ã</p>
<p><img class="aligncenter wp-image-1550 size-full" src="https://www.xuezdh.com/wp-content/uploads/2021/03/slice-04.jpg" alt="对 DB ååéçåèè¿è¡ Slice 访é®" width="600" height="365" /></p>
<p>ä¾æ¬¡ç±»æ¨ï¼å¯¹å访é®ï¼å°±æ¯å¡«åå°å“DB1.Static_1.W0”å“DB1.Static_1.W1”ã</p>
<p><strong>2. FBãFC åæ¥å£åéç Slice 访é®</strong></p>
<p>å建ç¨åºåï¼æ¬ä¾å建 FC åï¼ä¼åçå访é®ï¼ï¼å¨ Input å Output åå«å建åé“Input_1”å“Output_1”,æ°æ®ç±»ååå«æ¯ DInt å Dwordï¼å¯ä»¥çå°è¿ä¸¤ä¸ªåé没æç»å¯¹å°åï¼å¦ä¸å¾æ示ã</p>
<p><img class="aligncenter wp-image-1551 size-full" src="https://www.xuezdh.com/wp-content/uploads/2021/03/slice-05.jpg" alt="å建 FC åæ¥å£åé" width="502" height="307" /></p>
<p>ç¨åºæ®µ 1ï¼å¸¸å¼æ令填åå°å“Input_1.X0”ï¼èµå¼æ令填åå°å“Output_1.X0”ï¼ç¨åºæ®µ2ï¼MOVE æ令ç IN 管èå¡«åå°å“Input_1.W0”ï¼OUT 管èå¡«åå°å“Output_1.W0”ãæåå¦ä¸å¾æ示ã</p>
<p><img class="aligncenter wp-image-1552 size-full" src="https://www.xuezdh.com/wp-content/uploads/2021/03/slice-06.jpg" alt="对 FC æ¥å£åéè¿è¡ Slice 访é®" width="600" height="327" /></p>