描述
PLC控制系统的程序设计要点。PLC控制系统I/O分配，依据生产流水线从前至后，I/O点数由小到大;尽可能把一个系统、设备或部件的I/O信号集中编址，以利于维护。定时器、计数器要统一编号，不可重复使用同一编号，以确保PLC工作运行的可靠性。
OPTICAL COATING LABORATORY ROTARY DRIVE CONTROLLER
ALLEN BRADLEY 2755-HCG-4 BAR CODE / LASER SCANNER HH
NEW ABICOR BINZEL 780.0110 ATS-CAT TORCH MOUNT FOR WH
LEYBOLD TRIVAC D65BCS VACUUM PUMP
NEW SVG LITHO A-4 8-BIT CMOS MEMORY PCB P/N690-8232-003
NAIS MATSUSHITA ANR11501 LASER HEAD MICRO LASER SENSOR
NEW BOSCH TRANSFER LIFT MODEL HP20-59320X 320STAMTG
SUPERIOR ELECTRIC DRD002A 50 WATT DRIVE BOARD
JVC BR-S777U STEREO VIDEO CASSETTE DUPLICATOR
WESTINGHOUSE, AccuFlow JR ADJUSTABLE FREQUENCY CONTROL
RCS 940312 BIOTEST HYCON AIR SAMPLER WITH REMOTE & CASE
DAYKIN ELECTRIC LTFS-05 TRANSFORMER, DISCONNECT, 1000VA
SPEEDFAM 2805-700924 WAFER CARRIER ASSEMBLY 200MM
