​如果这时电磁阀动作，那么问题在PLC输出点上。由于电笔有时会虚报，可用另一种方法分析，用万用表电压档量PLC输出点与公共端的电压，电压为零或接近零，说明PLC输出点正常，故障点在外围。若电压较高，说明此触点接触电阻太大，已损坏。另外，当指示灯不亮，但对应的电磁阀、接触器等动作，这可能此输出点因过载或短路烧牢。这时应把此输出点的外接线拆下来，再用万用表电阻档去量输出点与公共端的电阻，若电阻较小，说明此触点已坏，若电阻无穷大，说明此触点是好的，应 是所对应的输出指示灯已坏Siemens 6RA2120-6DV66-0Heidenhain Leistungsplatine PLC-100 B 223 836 05 TNC150/151/155Siemens 6AV3627-1QK00-2AX0Siemens 6DM1001-8WD10MDV60A0750-503-4-49 MDV60A0750-503-4-04Siemens 6DD1611-0AE0Siemens 1FT3074-0AF61-9-ZStahl HMI Systems Panel 15" (1024 x 768) MT-436-TX Siemens 6DD1660-0AE0Siemens 6ES7414-1XG01-0AB0Siemens 6DD1645-0AC0Siemens 6F**100-1AA00-ZADEPT TECHNOLOGY SIO ASSY 10332-12350 MSK100B-0400-NN-S2-AG0-RNNNSt?ubli Assembly Board D22135601 200.17.P0481Pro-Face Proface Teach Pendant GP2301H-LG41-24V 3080028-03HCS02.1E-W0054-A-03-NNNN CSH01.1C-S3-ENS-EN2-MA1-S2-S-NN-FWMSK071E-0200-NN-S2-UG0-RNNNSiemens GGF2005-0BC01Indramat Umrichter RAC. Board 256047-02820 - A04Siemens 6RB2160-0FB00ADEPT TECHNOLOGY SIO ASSY 10332-22000 Vickers Motor Modul DBM-2A Typ: CG1213 03Siemens 6FM1470-4AA20Siemens 6FC5357-0AB20-1AE0Siemens 6AV3627-1JK00-0AX0 Siemens 6RA2125-6DV66-0Siemens 6FX1125-8AE04