模拟量故障结点被应用程序引用时，将对自诊断字节中除过程位所有位进行或运。任何一个自诊断位为ON,则报警结点闭合。所有自诊断位OFF,则报警结点打开。系统上电时，系统中许多模块进行上电自检。CPU模块执行硬件检测和软件确认检测。智能模块进行安装和确认板子上的微处理器，软件检查确认，本地硬件确认并且通知CPU自检完成。任何自检失败都会在系统配置周期的某–时刻以队列形势报告给CPU.
Vickers Hydraulic Valve DG5V-10-H-8C-X-E-T-VM #30394
Siemens Analog Module 6ES5243-1AB11 #29886
ABB CPU Board 3HAB 2241-1 /06A, 3HAB2241-1 #29139
Panasonic PANADAC 361A, Control System NM-1375A #22961
ABB CPU Board 3HAB 2241-1 / 06A #29138
Dongan Transformer 64-40000-1494 400 KVA #31965
Fanuc Control Board A16B-2100-020U/05D #36297
GFM / Keba Circuit Board GVME600SC-B #31866
MicroPoise PC Board E344FA #29419
Siemens Circuit Breaker ND63F120, 1200 Amp, 3 Pole #33
Giddings Lewis Centurion Servo Drive DSM110 #17198
Argus 0310108256N Alphanumeric Display #11770 WHL
Yaskawa AC Servo Motor USASEM-01YRW11 #31827
Bosch 10 HP Hydraulic Power Pak & Accumulator #6334
Adept Interface Module 10332-12350 #7614
Atlas Copco Control 4240037081, QCS2-T-34025 #13306
Modicon 19″ Operator Interface 557VCM74210 #11141
CMC Control Keypad CAMAC VLC 3-422-2017A #21188
Matsushita Electric GT30 Programmable Display #17189
