Figure 48 - Process Image Partition; Pip (Process Image Partition) - Datalogic AMT58*-PN Series Instruction Manual

AMT58x-PN ProfiNET®

11.5 PIP (Process Image Partition)

WARNING
Use of PIPs requires both in-depth skills and specific expertise in
SIMATIC STEP 7 programming environment. For detailed
information please consult the STEP 7 Programmer's handbook and
documentation.
11.5.1 Consistency
PIPs (Process Image Partitions) are used to update the distributed IO
device synchronously with the constant bus cycle time clock.
Compared with direct access to the input/output modules, the main
advantage of accessing the process image is that the CPU has a
consistent image of the process signals for the duration of one
program cycle. If a signal state on an input module changes while the
program is being executed, the signal state in the process image is
retained until the process image is updated again in the next cycle.
The process of repeatedly scanning an input signal within a user
program ensures that consistent input information is always
available. You define process image partition with STEP 7 when you
assign addresses (which input/output addresses of the modules are
listed in which process-image partition). The process image partition
is updated by the user with SFCs.

Figure 48 - Process Image Partition

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