Consult experts, the title is not very clear, I described the problem is simple: suppose production field have A, B, C three regions, each region has been set up respectively, A camera, all areas all cameras are connected together, and all regional production process is controlled by PLC, and form an industrial control network, if A regional production belt running deviation fault occurs, the signal will be into the PLC and the scene of the PLC control area sound and light alarm device, now want the PLC can also drive area (A) camera, let monitoring room directly on screen display area of A camera, don't need the manual to find and bring up the failure area camera picture, can you tell me how to implement?