The chain shown from the sample application performs data acquisition and control. These types of chains usually receive inputs from an I/O driver or OPC server through an input block, manipulate the inputs with secondary blocks, and return an adjusted value to the I/O driver or OPC server through an Analog Output, Digital Output, or On-Off Control block, as the following figure shows.
Sample Data Acquisition and Control Chain
You can also create chains that collect data for monitoring purposes. These types of chains usually receive inputs from an I/O driver or OPC server through an input block but may not return the inputs, since no process adjustment is required. The following figure shows a sample monitoring chain design.
Sample Monitoring Chain
The number of chains you can construct is limited only by memory.
