B． BSM报文（Baggage Source Message）。旅客在办理行李交运时，由值机计算机生成。民航总局的报文主机采集此信息，发送到机场计算机离港系统，然后通过行李分拣系统的报文接口机发送给行李分拣上位控制机，上位控制机将报文通过内部LAN传递给PLC 。行李报文包含有航班号、 目的地代码、流水号、行李件数等信息.。
C． 行李条码信息。行李条码包含行李流水号，旅客在办理行李交运时，由值机计算机生成，并被打印成条型码标签贴在旅客交运的行李上。当行李通过扫描站时，条型码信息被读码器自动扫描，并传递给PLC 。
1771-P5 POWER SUPPLY, SLOT, 8A, 24V DC
1771-P6 POWER SUPPLY, SLOT (ONE SLOT), 8A, 220V AC
1771-P7 POWER SUPPLY, 16A, 120/220V ACR SUPPLY
1771-PM CLUTCH/BRAKE MODULE ED IN PAIRSH/BRAKE MODULE
1771-PS7 MULTIVOLTAGE RACK PWR SUPPLY, +5V DC BACKPLANE,
+-15V DC, +5V DC, +24V DC ISOLATED,POWER SUPPLY
1771-PSC POWER SUPPLY CHASSIS, 4 SLOTS CHASSIS
1771-QA POS MODULE
1771-QB LINEAR HYDRAULIC POSITIONING MODULEOSITIONING MODULE
1771-QRC DUEL RTE MTR MOD/SOLAR TURBI
1771-RT41 REMOTE PANEL
1771-RT44 REMOTE PANEL
1771-RTP1 REMOTE PANEL
1771-RTP3 REMOTE PANEL
1771-RTP4 REMOTE PANEL
1771-SDN SCANNER MODULE
1771-SN SUB INPUT/OUTPUT SCANNER MODULE
1771-SIM 8PT SIM MODULE%
1771-VHSC SPEED COUNTER
1771-WA FIELD WIRING ARM
1771-WB FIELD WIRING ARM
1771-WC FIELD WIRING ARM
1771-WD FIELD WIRING ARM
1771-WE FIELD WIRING ARM
1771-WF FIELD WIRING ARM
1771-WG FIELD WIRING ARM
1771-WH FIELD WIRING ARM
1771-WHF FIELD WIRING ARM
1771-WHFB FIELD WIRING ARM
1771-WI FIELD WIRING ARM
1771-WN FIELD WIRING ARM
1771-XT CHANNEL TERMINAL
1771-XL CHANNEL TERMINAL
1772-B1 BATTERY TRAY
1772-B2 BRAKET,POWER SUPPLY
1772-CA POWER SUPPLY CABLE, 6'/1.83M
1772-CS PROCESSOR/SCANNER INTERCONNECT CABLE, 3'/0.9M,
1772-DQ LINE DRIVER/REC