Configuring
5.2 Configuring the CPU
CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
Operating Instructions, 11/2019, A5E35873416-AC
45
Address space using the analog electronic module 4 AI RTD High Feature as an example
Figure 5-11 Address space 4 AI RTD High Feature
Reference
You can find additional information on addressing and address allocation in the operating
instructions of the ET 200pro distributed I/O system
(https://support.industry.siemens.com/cs/ww/en/view/21210852
) and in the STEP 7 online
help.
5.2.3 Process images and process image partitions
5.2.3.1 Process image - overview
Process image of the inputs and outputs
The process images of the inputs and outputs is a map of the signal states. The CPU
transfers the values from the input and output modules into the process image of the inputs
and outputs. At the start of the cyclic program, the CPU transfers the process image output
as a signal state to the output modules. The CPU then transfers the signal states of the input
modules to the process image inputs.
Advantages of the process image
A process image accesses a consistent image of the process signals during cyclic program
execution. If a signal state at an input module changes during program processing, the
signal state is retained in the process image. The CPU does not update the process image
until the next cycle.
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