Monitor and method for information gathering method in secure network system and communication method and safety controller and safety slave and secure network system

摘要

Safety PLC1 and safe slave 2 through safe network 3, it is jointed. The safe slave, safe information transmission function and the aforementioned safe information which transmit the safe information which specifies whether or not there is a safe condition, possesses the non safe information transmission function which transmits the non safe information which is not included, aforementioned non safe information transmission function the aforementioned safe slave being safe condition transmits non safe information to condition. In other words, when it judges, that it is not safe the case of the timing which transmits non safe information safety is transmitted without sending non safe information. As for the safe controller, when non safe information is received, as for the transmission original safe slave of that non safe information it presumes that there is a safe condition.