[求助]关于西门子MEC中的AI点的一些问题...

<p>现有西门子一个PTM模组是只有8个AI点的，现在有数字量的信号要接收，西门子资料上，AI可以当DI用，但我试了很多次都不行，麻烦高人进来指点一下。</p>

<p>以前弄过，忘了！回头帮你问问高手！</p>

MEC上的可以做，扩展模块不行

可以做的2个3.3K欧姆电阻

三楼说得不对，我们在一些项目上专门配AI扩展模块代替DI点以节省成本的，等下发个接线图给你

&nbsp;<div class="O" vshape="_x0000_s3074"><div style="mso-line-spacing: '100 20 0'; mso-margin-left-alt: 216;"><span style="FONT-SIZE: 75%; FONT-FAMILY: Arial;"><span style="LEFT: -3.8%; POSITION: absolute; mso-special-format: bullet;">•</span></span><font size="4"><font color="#000000"><span style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial;">在MECAI点上连接一个</span><span lang="EN-US" style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: Arial; mso-ascii-font-family: Arial; mso-fareast-font-family: Arial;">1/2-Watt, 3.3K </span><span style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial;">欧姆的电阻在</span><span lang="EN-US" style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: Arial; mso-ascii-font-family: Arial; mso-fareast-font-family: Arial;"> 24 Vdc sensor supply</span><span style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial;">和</span><span lang="EN-US" style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: Arial; mso-ascii-font-family: Arial; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN;">AI</span><span style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial;">输入之间</span></font></font><span lang="EN-US" style="DISPLAY: none; FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: Verdana;"><br/><font color="#000000" size="4"><span style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial;"><font color="#000000" size="4">连接另一个电阻到信号输入端</font></span>&nbsp;&nbsp;<div style="mso-line-spacing: '100 50 0'; mso-margin-left-alt: 216;"><span style="DISPLAY: none; mso-special-format: lastCR;"><font color="#000000" size="4">扩展模块上的AI只要外接一个24VDC电源就可以同样方式转DI</font></span></div></font></span><span style="FONT-SIZE: 75%; FONT-FAMILY: Arial;"><span style="LEFT: -4.08%; POSITION: absolute; mso-special-format: bullet;"><font color="#000000" size="4">•</font></span></span><font size="4"><font color="#000000"><span style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial;">跳接输入类型为电流（</span><span lang="EN-US" style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: Arial,Bold;"><b>current</b></span><span lang="EN-US" style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Arial,Bold'; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-fareast-language: ZH-CN;"><b>）</b></span></font></font><span lang="EN-US" style="DISPLAY: none; FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Verdana; mso-fareast-font-family: 宋体; mso-hansi-font-family: 'Times New Roman';"><br/></span></div><div style="mso-line-spacing: '100 20 0'; mso-margin-left-alt: 216;"><span style="FONT-SIZE: 75%; FONT-FAMILY: Arial;"><span style="LEFT: -4.08%; POSITION: absolute; mso-special-format: bullet;"><font color="#000000" size="4">•</font></span></span><font size="4"><font color="#000000"><span style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-fareast-font-family: 宋体; mso-hansi-font-family: Arial;">定义点为</span><span lang="EN-US" style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: Arial; mso-ascii-font-family: Arial; mso-fareast-font-family: Arial;">LDI</span></font></font><span lang="EN-US" style="DISPLAY: none; FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: Verdana;"><br/></span></div><div style="mso-line-spacing: '100 20 0'; mso-margin-left-alt: 216;"><span style="FONT-SIZE: 75%; VISIBILITY: hidden; FONT-FAMILY: &quot;Siemens Sans&quot;;"><span style="LEFT: -4.08%; POSITION: absolute; mso-special-format: bullet;"><font color="#000000" size="4">•</font></span></span><span lang="EN-US" style="DISPLAY: none; FONT-SIZE: 75%; FONT-FAMILY: &quot;Siemens Sans&quot;;"></span></div><div style="mso-line-spacing: '100 50 0'; mso-margin-left-alt: 216;"><span style="DISPLAY: none; mso-special-format: lastCR;"><font color="#000000" size="4"></font></span></div></div>

[此贴子已经被作者于2006-8-17 22:52:47编辑过]

图片传不上来，只有根据字面理解啦

<p>不好意思，可能是我记错了。</p><p>549-209&nbsp;&nbsp; 549-210打完折扣相差也就那么点，还多了4DO，似乎没必要搞的这么麻烦吧。</p>

[此贴子已经被作者于2006-8-18 9:10:55编辑过]

<p>209和210差价在700以上哦，项目经常要用100来个，差价近10W啦</p>