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。
National Instruments PCI-GPIB 183619B-01 w/ 2 Cables
NATIONAL INSTRUMENTS. AT-GPIB/TNT
National Instruments GPIB-SCSI-A SCSI TO IEEE 488 CONTR
National Instruments 183742E-01 NI PCI-MIO-16XE-10 card
National Instruments AT-GPIB/TNT 181830F-01 Card
National Instruments GPIB X2 4.1 Meter Cable 763061-03
National Instruments NB-GPIB Mac NuBus Card 180510-01
National Instruments PXI-1000B 8-slot 3U PXI Chassis
National Instruments BNC-2110 185124F-01 Connector
National Instruments. PCI-6281
National Instruments PXI-8185 Data Collection PC
NATIONAL INSTRUMENTS PCI-6024E DAQ CARD
