PLC自检信号很多，内部器件也很多，多数使用者未充分发挥其作用。其实，完全可利用它进行PLC自身工作的监控，或对控制对象进行监控。对一个复杂的控制系统，特别是自动控制系统，监控以至进一步能自诊断是非常必要的，它可减少系统的故障，出了故障也好查找，可提高累计平均无故障运行时间，降低故障修复时间，提高系统的可靠性。
AB SD3000 PLUS DC POWER HEAT SINK ASSEMBLY 356405-C31/2
FISHER KM1303-F SIGNAL CHARACTERIZER MODULE 43A4304
NEW IN BOX MORSE M0-400A CAM CLUTCH GREASE M SERIES
CDS FM15S5N INDUSTRIAL TOUCH SCREEN PANEL MOUNT CDSFM15
MANUAL ACTIVATOR FOR BALL VALVE RATIO 24:1 90 DEGREE
NELES- JAMES SEGMENT BALL VALVE SIZE 04 / 06 R1LS 04/06
RELIANCE ELECTRIC AUTOMAX FIELD REGULATOR MODULE57412-E
WEG W21 15HP AC MOTOR T FRAME 3520RPM 575V 3PH 13.6A
NEW JAMESBURY 2.5" BUTTERFLY VALVE MODEL 815W113600TT
NEW RELIANCE ELECTRIC AC DRIVE SP600 6SP501-1P7CTNN 1HP
HONEYWELL ANALOG OUTPUT PROCESSOR 51304672-100 HDW.E1
PARKER SERVO MOTOR MPM1142ATG7G1R 3.3HP 4200RPM 230VAC
NEW ALLEN-BRADLEY MCC BUCKET SIZE 3 STARTER 509-DOD
ALLEN BRADLEY 1336-SN-SP15A/A INVERTER SNUBBER SEALED
