描述
采用逆读溯源法将多负载(如多电动机电路)分解为单负载(如单电动机)电路根据主电路中控制负载的控制电器的主触点文字符号，在PLC的I/O接线图中找出控制该负载的接触器线圈的输出继电器，再在梯形图和指令语句表中找出控制该输出继电器的线圈及其相关电路，这就是控制该负载的局部电路。
TOSHIBA YWA3466*A PX12-44265 BOARD
TOSHIBA YWM0672 PX12-44267 BOARD
HONEYWELL STD120-E1H-00000 ST3000 SMART TRANSMITTER
TOSHIBA YWM0565*A PX12-44256 DFIF BOARD
CONTROLLED MOTOR MT300436 FERRITE BRUSHED DC SERVOMOTOR
PACIFIC SCIENTIFIC PC832-001-T BRUSHLESS SERVO DRIVE
ALLEN BRADLEY 1761-L16BWA MICROLOGIX1000 CONTROLLER NIB
ALLEN BRADLEY 1785-L20B/C PLC-5/20 PROCESSOR MODULE
ALLEN BRADLEY 20B D 5P0 A 0 AYNANA0 POWERFLEX 700 DRIVE
DELL E2210H 21.5″ WIDESCREEN FLATPANEL MONITOR NIB
WORCESTER CONTROLS 20 PNEUMATIC ACTUATOR W/ VALVE
ROSEMOUNT 1151GP9E22M1B1 PRESSURE TRANSMITTER
ENDRESS+HAUSER FTM31DP-05CP1A SOLIPHANT II LIMIT SWITCH
