因为PLC本身的故障可能性极小,系统的故障主要来自外围的元部件,所以它的故障可分为如下几种:
(1)输入故障,即操作人员的操作失误;
■传感器故障;
■执行器故障;
■PLC软件故障
这些故障,都可以用合适的故障诊断方法进行分析和用软件进行实时监测,对故障进行预报和处理。
PLC控制系统的故障诊断方法
PLC控制系统故障的宏观诊断CEPEX ASTM F1970 PVC BALL VALVE 1" 240 PSI @ 73 F
CLIPPARD AF-UDR-32-2
APOLLO 73A-106-01 CARBON BALL VALVE 1-1/4'' NPT
NIB GOYEN 10BXX2 INDUSTRIAL VALVE 0-150PSI
GRUVLOK 2" PIPE COUPLINGS FIG. 7001
NIB PARKER 0RB9P3 SOLENOID VALVE onLY 3/8" NPT
NIB ARO 203-2-C AIR ConTROL VALVE
EATON 1164X6 PUSH-ON TEE 3/8" TUBE
MAC 821C-PM-506AA-152 SOLENOID VALVE W/ PME-506AAAA VALVE COIL 6.0 WATT
NIB FESTO VIGI-03-4,0 MANIFOLD BLOCK 10BAR/145PS MAT. NR. 18653, SERIE: W402
DWYER 2205MP MAGNEHELIC
MICROGLASS 121937 HIGH
NIB JOUCOMATIC 18990001 VALVE KIT NF-01, 2-N
PARKER VV500P-8 BALL VALVES 1/2" NPT