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以海瑞克盾构机为例,设计了泥水循环从站控制系统,使其与盾构机控制系统无缝连接,并独立于主站控制系统。各泥浆泵控制柜、阀门控制箱、地面监控站为从站结构,选用S7-200PLC控制,通过Profibus-DP现场总线与主站通讯;地面监控站采用S7-200PLC+Profibus-DP模块+计算机终端,同步显示远程控制站的泵、阀运行状态;泥浆泵驱动电机选用交流电机,调速控制采用schnielder Altivar71变频器+Profibus-DP通讯卡+S7-200PLC;采用Profibus-DP网络和西门子S7系列PLC搭建整个系统,总线采用2芯5类电缆作为传输介质,通讯速度可达12MBP;在本地控制柜增加光电隔离中继放大器,解决长距离盾构隧道掘进通讯信号传输衰减及隧道内用电安全等问题。
Taking Herrenknecht shield machine as an example, a mud-water cycle slave control system is designed to be seamlessly connected to the shield machine control system and independent of the master control system. The mud pump control cabinet, valve control box, ground monitoring station for the slave structure, the choice of S7-200PLC control, communication with the master station via Profibus-DP field bus; ground monitoring station using S7-200PLC + Profibus-DP module + computer terminal , Synchronous display of remote control station pumps, valves running state; mud pump drive motor selection AC motor, speed control using schnielder Altivar71 inverter + Profibus-DP communication card + S7-200PLC; using Profibus-DP network and Siemens S7 series PLC Set up the whole system, the bus adopts 2 cores and 5 types of cables as the transmission medium, communication speed up to 12MBP; in the local control cabinet to increase optoelectronic isolation relay amplifier to solve the long-distance shield tunneling communication signal transmission attenuation and tunnel electricity safety problem.