描述
如接线端或导线接触不良，接线端与实际信号不一致，输入信号线接反、松动、脱落，模块与底座接插不良等。人为的错误如将拨码开关位置放错，通信线接线方向错误或终端匹配器未接等。以上问题只要加强日常维修检查，加强人的责任心是可以杜绝、发现、消除的。
Yaskawa Motoman Servopack CACR-SR-03 AC 1 ER
Square D SY/MAX 8020 TYPE SCP-721 E/G Model 700 PLC
Square D Transformer disconnect 9070 SK1500G2 NEW inBOX
Gudel high performance servo worm gear box 8.00:1 NEW
Square D Transformer disconnect 9070 SK1000G2 D1 NIB
AccuTRUE90 Thomson Micron ATR010-016-SO, 16:1 NEW
Toshiba VT130G2U2055, 5.5kva, 5hp, Tosvert-130G2 NEW
