EasyManuals Logo

Siemens SIMATIC S7-1500 Automation System User Manual

Siemens SIMATIC S7-1500 Automation System
208 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #90 background imageLoading...
Page #90 background image
Configuring
7.2 Process images and process image partitions
S7-1500 Automation System
90 System Manual, 01/2013, A5E03461182-01
7.2.2 Automatically update process image partitions
One process image partition can be assigned to each organization block. In this case, the
process image partition is automatically updated. The exceptions are PIP 0 and isochronous
OBs.
Update process image partition
The process image partition is divided into two parts:
Process image partition of the inputs (PIPI)
Process image partition of the outputs (PIPQ)
The process image partition of the inputs (PIPI) is always read in/updated before the
processing of the associated OB. The process image partition of the outputs (PIPQ) is
always output at the end of the OB.
The following figure illustrates the updating of the process image partitions.
3URFHVVLQJRIWKHSURJUDPLQWKHFDOOHG
2%
3,3,[
UHDGLQ
3,34[
RXWSXW
Figure 7-10 Update process image partitions
7.2.3 Update process image partitions in the user program
As an alternative to the automatic updating of process image partitions, you can update
process images with the "UPDAT_PI" instruction or the "UPDAT_PO" instruction. In STEP 7,
these instructions are available on the "Instructions" Task Card under "Extended
instructions" and may be called from any point in the program.
Requirements for updating process image partitions with the "UPDAT_PI" and "UPDAT_PO"
instructions:
The process image partitions may not be assigned to any OB, i.e. they may not be
automatically updated.
PIP 0 (automatic update) can likewise not be updated with the "UPDAT_PI" and
"UPDAT_PO" instructions.
UPDAT_PI: Update the process image partition of the inputs
With this instruction you read the signal states from the input modules into the process
image partition of the inputs (PIPI).
UPDAT_PO: Update the process image partition of the outputs
With this instruction you transmit the process image partition of the outputs to the output
modules.

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Siemens SIMATIC S7-1500 Automation System and is the answer not in the manual?

Siemens SIMATIC S7-1500 Automation System Specifications

General IconGeneral
SeriesSIMATIC S7-1500
ProgrammingTIA Portal (Totally Integrated Automation Portal)
Protection ClassIP20
CPUVarious models available (e.g., CPU 1511-1 PN, CPU 1518-4 PN/DP)
Controller TypeModular Controller
Programming LanguagesLAD, FBD, STL, SCL, GRAPH
Communication InterfacesPROFINET, PROFIBUS, Ethernet, OPC UA
Digital InputsVaries by model and expansion modules
Digital OutputsVaries by model and expansion modules
Analog InputsVaries by model and expansion modules
Analog OutputsVaries by model and expansion modules
Backplane BusHigh-speed backplane bus for fast communication between modules
RedundancySupported with specific models and configurations
SafetyIntegrated safety functions available
ScalabilityHighly scalable with modular expansion
Operating Temperature0°C to 60°C

Related product manuals