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。
NEW SMC MGGMB63-700 CYLINDER GUIDE MGGMB63700
NEW MITUTOYO AT332-700 LINEAR SCALE AT332
NEW SIEMENS 6SN1113-1AB01-0BA1 MODULE 6SN11131AB010BA1
ALLEN BRADLEY 2706-B21J8 OPERATOR PANEL SERIES F
FANUC A16B-2200-0842 CPU BOARD NEW A16B22000842
INTEL 80/10A COMPUTER BOARD PWB1000950-02
GENERAL ELECTRIC IC600CB508A MEMORY MODULE 1-K REGISTER
NEW BAYSIDE RA90-020 PRECISION GEARHEAD RA90020 20:1
