描述
根据PLC梯形图程序扫描原则，按先左后右先上后下的步序，逐句扫描，执行程序。遇到程序跳转指令，根据跳转条件是否满足来决定程序的跳转地址。从用户程序涉及到输入输出状态时，PLC从输入映象寄存器中读出上一阶段采入的对应输入端子状态，从输出映象寄存器读出对应映象寄存器，根据用户程序进行逻辑运算，存入有关器件寄存器中。对每个器件来说，器件映象寄存器中所寄存的内容，会随着程序执行过程而变化。
New Alcatel SERV 3DB02155AA
Wonderware InTouch Development 1000 Tag FS2000/9.0 New
HAAS BRUSH ROTARY CONTROL F Board 32-3051F 93-1135 NEW
Lot 2K Atmel ATA5743P3-TGQY ATA5743 UHF Receiver $1.25p
NORTEL NTHW08CA Mss 15000 Control Processor (cp3) Modul
ALFA LAVAL Decanter Core Controller 6121.1227-01
Nortel Multiservice Switch 15000 SHELF New Spare
Cisco Unified Communications Manager CM6.1U4-K9-UPG=
SIMRAD MC50 Marine Computer 26056010
New NIDEC SANKYO SC3150 Robot Controller 200/230vAC
CG171A-T003-05 Reflector Film UX188 etching mould USED
Lot 80 CY7C1414SV18-250BZC CY7C1414 Chips $29/each
Honeywell 24 Beam Light curtain Control FF-LS242806842
