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。
KLA Tencor MMD analog AIT UV 0052196-007
KLA Tencor MMD analog AIT UV 0021488-004 Rev AA
KLA-Tencor Lower Octopole/Wein Lens 780-14108-000 Used
KLA-Tencor Lower Octopole/Wein Lens 780-14108-000 Used
KLA-Tencor AIT 2 GPIO Board 386065 working
KLA-Tencor Lid Lift Leg Assy. 781-11759-000 working
KLA-Tencor CIP XP Column Extension Assy. 0110157-000
KLA-Tencor 486i Controller 0020839 Rev.AA working
KLA-Tencor High Voltage Control Module 52-1081
KLA-Tencor CRS2000 Olympus Microscope Turret BH3-5NRE-M
KLA-Tencor AIT 2 PSF Driver Board 556661 working
