Description
安全联锁在系统中,考虑对关键工艺过程实现安全联锁,例如,后配料系统中,有如下联锁控制:
斗提机->混合器->运输带->皮带秤及计量泵
若下游设备发生故障,自动联锁停上游设备,并发出声光报警.
控制站软件采用SIEMENS公司SIMATIC STEP 7软件编制实现,STEP 7软件具备硬件组态、梯形图编程、语句表编程、SCL高级语言编程、CFC功能块等多种编程方式.其中,SCL高级语言编程功能可实现复杂算法的编制及”Know How”保护措施等实用技术,本系统的自动配料功能即采用SCL语言编制,并利用PLC仿真功能在编程器上进行模拟运行,以保证系统的可靠性.
操作站采用SIMATIC WINCC组态软件编制,我们将操作权限分为一般人员、操作员、维修工、工艺员、车间主管及系统工程师等不同级别,以保证系统的安全性.
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