I have twelve ControlLogix controllers spread throughout an oil production facility with local Panelviews on each unit. All PLCs are connected together wirelessly. There also exists a central control room running FactoryTalk View SE.
There is no actual control being done over wireless. Some tags are already being passed from the PLCs to the HMI in the control room for information only.
My problem exists that I need to pass ten or so tags from one location to all the PLCs. These tags are used in flow calculations at each PLC and don't need to be read but every ten minutes or so. To me the best way would be to create tags in the SE HMI and have the PLCs read that tag. Can a PLC read a tag from a SE HMI?
I have heard of produced consumed tags, but have never used them. The problem I have with that idea is that I could write from the SE HMI to one PLC using a reference tag to that PLC, but what if that PLC goes down? How can the other PLCs read that produced tag? The wireless signal out here can be very flakey at times and PLC can lose power, but if they can all read from the SE HMI it seems as though my chances for the HMI to go down would be minimal.
All thoughts and ideas are very welcomed and appreciated.
There is no actual control being done over wireless. Some tags are already being passed from the PLCs to the HMI in the control room for information only.
My problem exists that I need to pass ten or so tags from one location to all the PLCs. These tags are used in flow calculations at each PLC and don't need to be read but every ten minutes or so. To me the best way would be to create tags in the SE HMI and have the PLCs read that tag. Can a PLC read a tag from a SE HMI?
I have heard of produced consumed tags, but have never used them. The problem I have with that idea is that I could write from the SE HMI to one PLC using a reference tag to that PLC, but what if that PLC goes down? How can the other PLCs read that produced tag? The wireless signal out here can be very flakey at times and PLC can lose power, but if they can all read from the SE HMI it seems as though my chances for the HMI to go down would be minimal.
All thoughts and ideas are very welcomed and appreciated.