SIS卡件 F3331

SIS卡件 F3331

PLC接通电源并开始运行后，立即开始进行自诊断，自诊断时间的长短随用户程序的长短而变化。自诊断通过后，CPU就对用户程序进行扫描。扫描从0000H地址所存的第一条用户程序开始，顺序进行，直到用户程序占有的后一个地址为止，形成一个扫描循环，周而复始。顺序扫描的工作方式简单直观，它简化了程序的设计，并为PLC的可靠运行提供了保证。一方面所扫描到的指令被执行后，其结果马上就可以被将要扫描到的指令所利用。另一方面还可以通过CPU设置扫描时间监视定时器来监视每次扫描是否超过规定的时间，从而避免由于CPU内部故障使程序执行进入循环而造成的故障。

FANUC I/O MODULE, MISSING COVER A0A12F 03B-0807-C159 102384

EAGLE TECH OPTO 22 PCB 017-0001 NIB

REXROTH MECMAN 0-500 NL/MIN. 200-1200HZ AIR VOLUME SENSOR, 553-001-008-0

POLYSONICS MASTER SERIES 4-20mA 110VAC ULTRASONIC FLOWMETER MST-P

MITSUBISHI ELECTRIC MELSEC-Q BASE UNIT Q33B-E

TELEMECANIQUE YELLOW LED CLUSTER NIB DL1BDB8

DYNAPATH DELTA T4201085D DC I/O INTERFACE 2 4201755A 3460

HEIDENHAIN 426 5000 27S12-03 ROTARY ENCODER 376 846-M1

AMPHENOL 17-POSITION PLUG CONNECTOR MS31088-20-295

KRAUSSMAFFEI  CONTROL BOARD   LV100 5096969

ALLEN BRADLEY  AB DC INPUT 1756-IB32/B REV B02 99588

MARATHON MONITORS INC Dualpro CONTROLLER/PROGRAMMER FDP121-4.0

PANASONIC CONTROL CIRCUIT BOARD ZUEP14022B

INFITEC 120VAC TIME DELAY RELAY KMKR5A115 NIB

ADCOLE REV.B PC BOARD F32801 / F32800

HONEYWELL CONTROL NETWORK MODULE 620-0038, NNB

HONEYWELL CONTROL NETWORK MODULE 620-0038, NNB

USON 486 CPU BOARD 486A300H

ABB A/D COMBINATION I/O MODULE 3HAB7230-1/04 / DSQC327 101790

FOXBORO CURRENT TO AIR CONVERTER E69R-I2 102474

OPTO 22 CONTROL BOARD 001828G

FESTO PRESSURE REGULATOR LR 3/8-D-MIDI P/N 173656 NNB

XYCOM BOARD 71566D

REXROTH ERGOSPIN TIGHTENING CONTROLLER 0 608 830 160

SCHNEIDER PUSH BUTTON INDICATOR LOT OF 2 NIB XB4 BVB6 / 011907 100500

MODICON, INPUT MODULE AS-B551-001

EUCHNER SAFETY RELAY MODULE ESM-BA302

TOYODA TOYOPUC OUT-11 MODULE THL-2795

NAMCO PROXIMITY SWITCH EE951-02103 NIB

HONEYWELL VALVE REBUILD KIT 14003119-001

INDUCTOHEAT CONTROL BOARD 31035-501

MARPOSS CONTROL BOARD 6830338800 / 6366324200

MARPOSS CONTROL BOARD 6830338700 / 6366324100

MARPOSS CONTROL BOARD 6830230903 / 6321322800

BUEHLER CIRCUIT BOARD 1172

ALLEN BRADLEY  CONTROL LOGIX DC EFUSED OUTPUT  1756-OB16E/A REC HO1

MARPOSS PC BOARD 6321600300 BROKEN CLIP

GORDOS CROUZET DC I/O MODULE DR-IDC5

CROUZET 81-513-065 SUB BASE FOR MINIATURE SOLENOID VALVES, NNB

USON DUAL TESTER MEMORY MODULE 430-X300 REV. C

ABB PROCESS CONTROLLER NIB COMMANDER 250