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The second level network of ABB UAC389AE02 HIEE300888R0002 is the communication between controllers, connecting three types of
A controller that completes different tasks on a bus is called a control bus. Does the number of different controllers on the control bus vary
There are limitations. In addition to three different controller modules, there is also an interface module for the DCS network on this bus. control
On the control bus, data can be called between controllers. The combination between analog and switch quantities is very good. Not all
All DCS systems have control buses, and various controllers can be separately connected to the DCS network. Data calls between controllers require
It needs to be done through the DCS network. The speed situation of the control bus is similar to that of the VO bus. Usually in the tens to tens of megabytes
Between. When the CPU and memory have strong capabilities, complete logical operations of switch signals and analog signals in a controller
The collection function of. There is only one form of controller on the control bus. Its protocol adopts carrier monitoring and broadcast transmission, with
And a protocol similar to Ethernet

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