程序注释。plc上电 扫描执行初始化init()子程序，初始化通信参数，上、下游海拔预置值，各个传感器调零值，拦污栅压差整定值等。
传感器通信
计算calc()子程序，计算出上、下游，拦污栅后的实际海拔值，拦污栅压差、各机组有效水头等。
信号输出out()子程序，拦污栅压差过大报警、通信故障报警、装置故障报警、4～20ma模拟量输出等。
数据上送sent()子程序，根据监控上位机通信规约，组织上送数据信文，含各实际海拔值、有效水头、详细故障信息、拦污栅压差报警定值等。
1747-OCDPDE OC DOC SET/GERMAN
1747-OCDPES OC DOC SET/SPANISH
1747-OCDPFR OC DOC SET/FRENCH
1747-OCDPIT OC DOC SET/ITATIAN
1747-OCDR16 16 MB DRAM FOR 1747 OPEN CONTROLLER
1747-OCDR32 32 MB DRAM FOR 1747 OPEN CONTROLLER
1747-OCDR4 4 MB DRAM TO 1747 OPEN CONTROLLER
1747-OC ETHE(10/100 BASET)MODULE
1747-OCF 266 MHZ OPEN CONTROL PROCESSOR
1747-OCFAN1 FAN ASSEMBLY FOR 1747 OPEN CONTROLLER
1747-OCIDE1 ATA CARRIER CARD/IDE DRIVE EXPANDER MODULE
1747-OCIDE25 2.5 IDE DRIVE EXPANSION MODULE
1747-OCKTX SINGLE CHANNEL 1-BM OPTION MODULE
1747-OCKTXD DUAL CHANNEL A-BM OPTION MODULE
1747-OCP252 PARALLEL ADAPTER CABLE
1747-OCPCI2 2-SLOT PCI FOR 1747 OPEN CONTROLLER
1747-OCPCI3 3-SLOT PCI FOR 1747 OPEN CONTROLLER
1747-OCPCI4 4-SLOT PCI FOR 1747 OPEN CONTROLLER
1747-OCPCI5 5-SLOT PCI FOR 1747 OPEN CONTROLLER
1747-OCPCI6 6-SLOT PCI FOR 1747 OPEN CONTROLLER
1747-OCPCM1 PCMCIA OPTION MODULE
1747-OCPCM2 PCMCIA OPTION MODULE WITH CARD & SOCKET
1747-OCS92 SERIAL ADAPTER CABLE
1747-OCSBC SERIAL BOOT CABLE
1747-OCSDCK FLASHDRIVE CABLE KIT FOR 1747 OPEN CONTROLLER
1747-OCTS OPEN CONTROLLER FAMILY SUPPORT CONTRACT
1747-O OPEN CONTROLLER FAMILY UPDATE SERVICE
1747-OCVGA1 VGA OPTION MODULE FOR 1747 OPEN CONTROLLER PCI
1747-OCVGAEBO OPTION MODULE
1747-PCIAA 1747 PCI INTERFACE KIT
1747-PCIAB 1747 PCI INTERFACE KIT
1747-PCIBA 1747 PCI INTERFACE KIT
1747-PCIBB 1747 PCI INTERFACE KIT
1747-PCIC INTERCONNECT CABLE 9.84 FT
1747-PCIC2 INTERCONNECT CABLE 32.81 FT
1747-PCIL 1746 CHASSIS INTERFACE MODULE
1747-PCINT API SOARE FOR WINDOWS NT
1747-PCIS PCI CARD WITH 256K STATIC RAM