紧急求助西门子mec问题！！！...

因系统设计问题。mec上DI点发现不够用（附近无其它控制器，也没有预算再增加任何类型控制器）！！！紧急求助各位高人，如何将AI点变成DI点的方法！谢谢！

<p>SIEMENS MEC模块中的AI点是可以当DI点用的。MEC模块上提供有24VDC的辅助电源，用2个3.3K欧姆，1/2 W的电阻,一个与24VDC电源接,另一个与现场的干接点连接后再接入MEC模块的AI点.</p><p>从事SIEMENS、HONEYWELL、JOHNSON、TAC的楼控系统调试</p><p>E-Mail:hxl983420@21cn.com<br/>QQ:107594061</p>

&nbsp;<div class="O" vshape="_x0000_s2050"><div style="mso-line-spacing: &quot;100 20 0&quot;;"><span style="FONT-SIZE: 75%; FONT-FAMILY: Arial;"><span style="LEFT: -0.92%; POSITION: absolute; mso-special-format: bullet;">•</span></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;">连接一个</span><span 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;">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 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;"> 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><span 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: Verdana;">
                        </span></div><div style="mso-line-spacing: &quot;100 20 0&quot;;"><span style="FONT-SIZE: 75%; FONT-FAMILY: Arial;"><span style="LEFT: -1.02%; POSITION: absolute; mso-special-format: bullet;">•</span></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;">连接另一个电阻到信号输入端</span><span 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: Verdana;">
                        </span></div><div style="mso-line-spacing: &quot;100 20 0&quot;;"><span style="FONT-SIZE: 75%; FONT-FAMILY: Arial;"><span style="LEFT: -1.02%; POSITION: absolute; mso-special-format: bullet;">•</span></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;">跳接输入类型为电流（</span><span lang="EN-US" style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: Arial,Bold; mso-ascii-font-family: &quot;Arial,Bold&quot;; mso-fareast-font-family: 宋体; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-fareast-language: ZH-CN;"><b>current</b></span><span lang="EN-US" style="FONT-SIZE: 75%; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Arial,Bold&quot;; mso-fareast-font-family: 宋体; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-fareast-language: ZH-CN;"><b>）</b></span><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: &quot;Times New Roman&quot;; mso-fareast-language: ZH-CN;">
                        </span></div><div style="mso-line-spacing: &quot;100 20 0&quot;;"><span style="FONT-SIZE: 75%; FONT-FAMILY: Arial;"><span style="LEFT: -1.02%; POSITION: absolute; mso-special-format: bullet;">•</span></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;">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: 宋体; mso-hansi-font-family: Arial; mso-fareast-language: ZH-CN;">LDI</span><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: Verdana; mso-fareast-language: ZH-CN;">
                        </span></div><div style="mso-line-spacing: &quot;100 50 0&quot;;"><span style="DISPLAY: none; mso-special-format: lastCR;"></span></div></div>

噢