Siemens Simatic S7-1500 User manual

CPU 1516-3 PN/DP
(6ES7516-3AN01-0AB0)
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SIMATIC
S7-1500
CPU 1516-3 PN/DP
(6ES7516-3AN01-0AB0)
Manual
09/2016
A5E03461313
-AD
Preface
Documentation guide
1
Product overview
2
Connecting up
3
Interrupts, error messages,
diagnostics and system
alarms
4
Technical specifications
5
Dimensional drawing
A

Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E03461313-AD
Ⓟ
08/2016 Subject to change
Copyright © Siemens AG 2013 - 2016.
All rights reserved
Legal information
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This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
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All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
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Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

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Preface
Purpose of the documentation
This manual supplements the system manual of the S7-1500 automation system/ET 200MP
distributed I/O system as well as the function manuals. This manual contains a description of
the module-specific information. The system-related functions are described in the system
manual. All system-spanning functions are described in the function manuals.
The information provided in this manual and the system manual enables you to commission
the CPU 1516-3 PN/DP.
Conventions
STEP 7: In this documentation, "STEP 7" is used as a synonym for all versions of the
configuration and programming software "STEP 7 (TIA Portal)".
Please also observe notes marked as follows:
Note
A note contains important information on the product described in the documentation, on the
handling of the product or on the section of the documentation to which particular attention
should be paid.
Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions only form one element of such a concept.
Customer is responsible to prevent unauthorized access to its plants, systems, machines
and networks. Systems, machines and components should only be connected to the
enterprise network or the internet if and to the extent necessary and with appropriate security
measures (e.g. use of firewalls and network segmentation) in place.
Additionally, Siemens’ guidance on appropriate security measures should be taken into
account. For more information about industrial security, please visit
(http://www.siemens.com/industrialsecurity).
Siemens’ products and solutions undergo continuous development to make them more
secure. Siemens strongly recommends to apply product updates as soon as available and to
always use the latest product versions. Use of product versions that are no longer supported,
and failure to apply latest updates may increase customer’s exposure to cyber threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under (http://www.siemens.com/industrialsecurity).

Preface
CPU 1516-3 PN/DP (6ES7516-3AN01-0AB0)
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Siemens Industry Online Support
You can find current information on the following topics quickly and easily here:
●
Product support
All the information and extensive know-how on your product, technical specifications,
FAQs, certificates, downloads, and manuals.
●
Application examples
Tools and examples to solve your automation tasks – as well as function blocks,
performance information and videos.
●
Services
Information about Industry Services, Field Services, Technical Support, spare parts and
training offers.
●
Forums
For answers and solutions concerning automation technology.
●
mySupport
Your personal working area in Industry Online Support for messages, support queries,
and configurable documents.
This information is provided by the Siemens Industry Online Support in the Internet
(http://www.siemens.com/automation/service&support).
Industry Mall
The Industry Mall is the catalog and order system of Siemens AG for automation and drive
solutions on the basis of Totally Integrated Automation (TIA) and Totally Integrated Power
(TIP).
Catalogs for all the products in automation and drives are available on the Internet
(https://mall.industry.siemens.com).

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Table of contents
Preface ................................................................................................................................................... 4
1 Documentation guide .............................................................................................................................. 7
2 Product overview .................................................................................................................................. 11
2.1 New functions in firmware version V2.0................................................................................. 11
2.2 Applications of the S7-1500 CPU .......................................................................................... 13
2.3 How it works........................................................................................................................... 18
2.4 Properties............................................................................................................................... 19
2.5 Operating and display elements ............................................................................................ 24
2.5.1 Front view of the module with closed front panel................................................................... 24
2.5.2 Front view of the module without front panel ......................................................................... 26
2.5.3 Rear view of the module ........................................................................................................ 27
2.6 Mode selector switch ............................................................................................................. 27
3 Connecting up....................................................................................................................................... 28
4 Interrupts, error messages, diagnostics and system alarms................................................................... 32
4.1 Status and error display of the CPU ...................................................................................... 32
5 Technical specifications ........................................................................................................................ 35
A Dimensional drawing............................................................................................................................. 47

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Documentation guide
1
The documentation for the SIMATIC S7-1500 automation system, the CPU 1516pro-2 PN
based on SIMATIC S7-1500 and the SIMATIC ET 200MP distributed I/O system is arranged
into three areas.
This arrangement enables you to access the specific content you require.
Basic information
The System Manual and Getting Started describe in detail the configuration, installation,
wiring and commissioning of the SIMATIC S7-1500 and ET 200MP systems. For
CPU 1516pro-2 PN you use the corresponding operating instructions. The STEP 7 online
help supports you in the configuration and programming.
Device information
Product manuals contain a compact description of the module-specific information, such as
properties, wiring diagrams, characteristics and technical specifications.

Documentation guide
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General information
The function manuals contain detailed descriptions on general topics regarding the SIMATIC
S7-1500 and ET 200MP systems, e.g. diagnostics, communication, motion control, Web
server, OPC UA.
You can download the documentation free of charge from the Internet
(http://w3.siemens.com/mcms/industrial-automation-systems-simatic/en/manual-
overview/Pages/Default.aspx).
Changes and supplements to the manuals are documented in a Product Information.
You can download the product information free of charge from the Internet
(https://support.industry.siemens.com/cs/us/en/view/68052815).
Manual Collection S7-1500/ET 200MP
The Manual Collection contains the complete documentation on the SIMATIC S7-1500
automation system and the ET 200MP distributed I/O system gathered together in one file.
You can find the Manual Collection on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/86140384).
SIMATIC S7-1500 comparison list for programming languages
The comparison list contains an overview of which instructions and functions you can use for
which controller families.
You can find the comparison list on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/86630375).
"mySupport"
With "mySupport", your personal workspace, you make the best out of your Industry Online
Support.
In "mySupport", you can save filters, favorites and tags, request CAx data and compile your
personal library in the Documentation area. In addition, your data is already filled out in
support requests and you can get an overview of your current requests at any time.
You must register once to use the full functionality of "mySupport".
You can find "mySupport" on the Internet (https://support.industry.siemens.com/My/ww/en).
"mySupport" - Documentation
In the Documentation area in "mySupport" you can combine entire manuals or only parts of
these to your own manual.
You can export the manual as PDF file or in a format that can be edited later.
You can find "mySupport" - Documentation on the Internet
(http://support.industry.siemens.com/My/ww/en/documentation).

Documentation guide
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"mySupport" - CAx data
In the CAx data area in "mySupport", you can access the current product data for your CAx
or CAe system.
You configure your own download package with a few clicks.
In doing so you can select:
●Product images, 2D dimension drawings, 3D models, internal circuit diagrams, EPLAN
macro files
●Manuals, characteristics, operating manuals, certificates
●Product master data
You can find "mySupport" - CAx data on the Internet
(http://support.industry.siemens.com/my/ww/en/CAxOnline).
Application examples
The application examples support you with various tools and examples for solving your
automation tasks. Solutions are shown in interplay with multiple components in the system -
separated from the focus on individual products.
You will find the application examples on the Internet
(https://support.industry.siemens.com/sc/ww/en/sc/2054).
TIA Selection Tool
With the TIA Selection Tool, you can select, configure and order devices for Totally
Integrated Automation (TIA).
This tool is the successor of the SIMATIC Selection Tool and combines the known
configurators for automation technology into one tool.
With the TIA Selection Tool, you can generate a complete order list from your product
selection or product configuration.
You can find the TIA Selection Tool on the Internet
(http://w3.siemens.com/mcms/topics/en/simatic/tia-selection-tool).

Documentation guide
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SIMATIC Automation Tool
You can use the SIMATIC Automation Tool to run commissioning and maintenance activities
simultaneously on various SIMATIC S7 stations as a bulk operation independently of the TIA
Portal.
The SIMATIC Automation Tool provides a multitude of functions:
●Scanning of a PROFINET/Ethernet network and identification of all connected CPUs
●Address assignment (IP, subnet, gateway) and station name (PROFINET device) to a
CPU
●Transfer of the date and the programming device/PC time converted to UTC time to the
module
●Program download to CPU
●Operating mode switchover RUN/STOP
●Localization of the CPU by means of LED flashing
●Reading out CPU error information
●Reading the CPU diagnostic buffer
●Reset to factory settings
●Updating the firmware of the CPU and connected modules
You can find the SIMATIC Automation Tool on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/98161300).
PRONETA
With SIEMENS PRONETA (PROFINET network analysis), you analyze the PROFINET
network during commissioning. PRONETA features two core functions:
●The topology overview independently scans PROFINET and all connected components.
●The IO check is a fast test of the wiring and the module configuration of a system.
You can find SIEMENS PRONETA on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/67460624).

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Product overview
2
2.1
New functions in firmware version V2.0
New functions of the CPU in firmware version V2.0
This section lists the new features of the CPU with firmware version V2.0.
You can find additional information in the sections of this manual.
Table 2- 1 New functions of the CPU with firmware version 2.0 compared with firmware version V1.8
New functions
Applications
Customer benefits
OPC UA server
You realize the data communication between
different systems, both within the process level
and on the control and enterprise levels:
•To embedded systems with controllers
•To controllers with MES systems and sys-
tems of the enterprise level (ERP, asset
systems)
•To Siemens controllers with controllers
from other manufacturers
•To intelligent sensors with controllers
Supported standard: OPC Data Access, DA.
OPC UA is a unified standard for data communi-
cation and is independent of any particular oper-
ating system platforms.
You have integrated security mechanisms on
different automation systems, for example, for
data exchange, on the application level, for au-
thentication of the user.
OPC UA servers provide a large amount of data:
•Values of PLC tags that clients can access
•Data types of these PLC tags
•Information about the OPC UA server itself
and the CPU
In this way, clients can gain an overview and can
read and write values.
PROFINET IO
PROFINET IO on the
2nd PROFINET inter-
face
You can operate another PROFINET IO sys-
tem on the CPU or connect additional IO de-
vices.
You use a fieldbus in the plant.
The CPU can perform fast and deterministic data
exchange as an I-device with a higher-level con-
troller (PROFINET/Ethernet) through the second
line.
MRPD: Media Re-
dundancy for Planned
Duplication for IRT
PROFINET IO IRT enables you to realize
applications that place particularly high de-
mands on failure safety and accuracy (isoch-
ronous).
By sending the cyclic IO data in both directions in
the ring, the communication to the IO devices is
maintained even when the ring is interrupted and
does not result in device failure even with fast
update times. You achieve higher failure safety
than with MRP.
PROFINET perfor-
mance upgrade
You can develop applications with high de-
mands on speed and clock cycles. This is
interesting for applications with high demands
on performance.
Better utilization of the bandwidth results in short
reaction times.
Limitation of the data
infeed into the net-
work
You limit the network load for standard Ether-
net communication to a maximum value.
You smooth peaks in the data infeed.
You share the remaining bandwidth based on
requirements.

Product overview
2.1 New functions in firmware version V2.0
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New functions
Applications
Customer benefits
Display and Web server
Backing up and re-
storing via the display
You can back up and restore the CPU configu-
ration to/from the SIMATIC memory card with-
out a programming device/PC.
You can make a backup copy of an operational
project without STEP 7.
In an "emergency", you can simply use an exist-
ing configuration without STEP 7, for example,
during commissioning or after a program down-
load.
Backing up and re-
storing via the Web
server
You can, for example, backup and restore the
configuration of the CPU to the PG/PC on
which the Web server is running.
Display and Web
server provide up to
three project lan-
guages for comments
and message texts
When you export your plants worldwide, for
example, comments or message texts can be
stored on the card in up to 3 languages. For
example, German - author's language, English
- internationally usable, Portuguese - end
user's language.
You provide customers with better service.
Trace via Web server When you enable trace functions via the Web
server, you have better service support. You
can send your trace recordings via Web ser-
vice, for example, to your service partner.
You get plant/project information for diagnostics
and maintenance requirements without STEP 7.
You can provide trace recordings for each Web
server.
You save time in troubleshooting.
Monitoring of config-
ured technology ob-
jects via a Web server
You can monitor statuses, errors, technology
alarms and the current values of technology
objects (TOs) with the Web server.
Formatting, erasing or
converting a SIMATIC
memory card via the
display
Your SIMATIC memory card is directly formatted, erased or converted to a program card without
having to use STEP 7. You save time.
Motion control
Greater number of
axes for Motion Con-
trol applications and
new technology ob-
jects: Output cam,
cam track and meas-
uring input
Speed specification, e.g. for:
•Pumps, fans, mixers
•Conveyor belts
•Auxiliary drives
Positioning tasks, e.g.:
•Lifting and vertical conveyors
•Feeding and gate control
•Palletizing equipment
Output cams and cam tracks make other ap-
plications possible, e.g.:
•Applying glue tracks
•Triggering switching operations with pre-
cise positioning
•Very precise processing of products on a
conveyor belt
Measuring inputs are used, for example:
•For measuring products
•
For detecting the position of the product on
a conveyor belt
You can implement additional Motion Control
applications with a CPU.
The scalable configuration limits allow you to
handle all types of application.
High machine speeds result in greater productivi-
ty with better accuracy.

Product overview
2.2 Applications of the S7-1500 CPU
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2.2
Applications of the S7-1500 CPU
Area of application
SIMATIC S7-1500 is the modular control system for a wide variety of automation
applications in discrete automation.
The modular and fanless design, simple implementation of distributed structures, and user-
friendly operation make SIMATIC S7-1500 the economic and convenient solution for a
variety of tasks.
Applications of the SIMATIC S7-1500, include, for example:
●Special-purpose machines
●Textile machinery
●Packaging machines
●General mechanical engineering
●Controller engineering
●Machine tool engineering
●Installation engineering
●Electrical industry and crafts
●Automobile engineering
●Water/waste water
●Food & Beverage
Applications of the SIMATIC S7-1500T include, for example:
●Packaging machines
●Converting application
●Assembly automation
Several CPUs with various levels of performance and a comprehensive range of modules
with many convenient features are available. Fail-safe CPUs enable use in fail-safe
applications. The modular design allows you to use only the modules that you need for your
application. The controller can be retrofitted with additional modules at any time to expand its
range of tasks.
High industrial capability from the high resistance to EMC, shock and vibration enable
universal use of the SIMATIC S7-1500.

Product overview
2.2 Applications of the S7-1500 CPU
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Performance segments of the standard, compact, fail-safe and technology CPUs
The CPUs can be used for smaller and mid-range applications, as well as for the high-end
range of machine and plant automation.
Table 2- 2 Standard CPUs
CPU
Performance segment
PROFIBUS
interfaces
PROFINET
IO RT/IRT
interfaces
PROFINET
IO RT
interface
PROFINET
basic func-
tionality
Work
memory
Processing
time for bit
operations
CPU 1511-1 PN Standard CPU for small
to mid-range applications
-- 1 -- -- 1.23 M
B
60 ns
CPU 1513-1 PN Standard CPU for mid-
range applications
-- 1 -- -- 1.95 M
B
40 ns
CPU 1515-2 PN Standard CPU for mid-
range to large applica-
tions
-- 1 1 -- 3.75 M
B
30 ns
CPU 1516-3
PN/DP
Standard CPU for de-
manding applications and
communication tasks
1 1 1 -- 6.5 MB 10 ns
CPU 1517-3
PN/DP
Standard CPU for de-
manding applications and
communication tasks
1 1 1 -- 11 MB 2 ns
CPU 1518-4
PN/DP
CPU 1518-4
PN/DP ODK
Standard CPU for high-
performance applica-
tions, demanding com-
munication tasks and
very short reaction times
1 1 1 1 26 MB 1 ns
Table 2- 3 Compact CPUs
CPU
Performance segment
PROFIBUS
interfaces
PROFINET
IO RT/IRT
interfaces
PROFINET
IO RT
interface
PROFINET
basic func-
tionality
Work
memory
Processing
time for bit
operations
CPU 1511C-1
PN
Compact CPU for small
to mid-range applications
-- 1 -- -- 1.175 M
B
60 ns
CPU 1512C-1
PN
Compact CPU for mid-
range applications
-- 1 -- -- 1.25 M
B
48 ns

Product overview
2.2 Applications of the S7-1500 CPU
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Table 2- 4 Fail-safe CPUs
CPU
Performance segment
PROFIBUS
interfaces
PROFINET
IO RT/IRT
interfaces
PROFINET
IO RT
interface
PROFINET
basic func-
tionality
Work
memory
Processing
time for bit
operations
CPU 1511F-1
PN
Fail-safe CPU for small to
mid-range applications
-- 1 -- -- 1.23 MB 60 ns
CPU 1513F-1
PN
Fail-safe CPU for mid-
range applications
-- 1 -- -- 1.95 MB 40 ns
CPU 1515F-2
PN
Fail-safe CPU for mid-
range to large applica-
tions
-- 1 1 -- 3.75 MB 30 ns
CPU 1516F-3
PN/DP
Fail-safe CPU for de-
manding applications and
communication tasks
1 1 1 -- 6.5 MB 10 ns
CPU 1517F-3
PN/DP
Fail-safe CPU for de-
manding applications and
communication tasks
1 1 1 -- 11 MB 2 ns
CPU 1517TF-3
PN/DP
CPU 1518F-4
PN/DP
CPU 1518F-4
PN/DP ODK
Fail-safe CPU for high-
performance applica-
tions, demanding com-
munication tasks and
very short reaction times
1 1 1 1 26 MB 1 ns
Table 2- 5 Technology CPUs
CPU
Performance segment
PROFIBUS
interfaces
PROFINET
IO RT/IRT
interfaces
PROFINET
IO RT
interface
PROFINET
basic func-
tionality
Work
memory
Processing
time for bit
operations
CPU 1511T-1
PN
Technology CPU for
small to mid-range appli-
cations
-- 1 -- -- 1.23 MB 60 ns
CPU 1515T-2
PN
Technology CPU for mid-
range to large applica-
tions
-- 1 1 -- 3.75 MB 30 ns
CPU 1517T-3
PN/DP
Technology CPU for
complex applications and
communication tasks
1 1 1 -- 11 MB 2 ns
CPU 1517TF-3
PN/DP
This CPU is described in the fail-safe CPUs

Product overview
2.2 Applications of the S7-1500 CPU
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Performance segments of compact CPUs
The compact CPUs can be used for smaller to mid-range applications and have an
integrated analog and digital on-board I/O as well as integrated technology functions. The
following table shows the specific properties of the Compact CPUs.
CPU 1511C-1 PN
CPU 1512C-1 PN
Integrated analog inputs/outputs
5 inputs/2 outputs
5 inputs/2 outputs
Integrated digital inputs/outputs 16 inputs/16 outputs 32 inputs/32 outputs
High-speed counters
6
6
Pulse generators
•PWM (pulse-width modulation)
•PTO (Pulse Train Output or stepper motor control)
•Frequency output
4 (PTOx/PWMx) 4 (PTOx/PWMx)
Integrated technological functions
The CPUs of the SIMATIC S7-1500
support motion control functions. STEP 7 offers blocks
standardized according to PLCopen for configuring and connecting a drive to the CPU.
Motion Control supports speed-controlled, positioning and synchronous axes (synchronizing
without specification of the synchronous position) as well as external encoders, cams, cam
tracks and measuring inputs.
The CPUs of theSIMATIC S7-1500T
support advanced motion control functions in addition
to the motion control functions offered by the standard CPUs. Additional motion control
functions are absolute synchronous axes (synchronization with specification of synchronous
position) and the cam.
For effective commissioning, diagnostics and fast optimization of drives and controls, the
SIMATIC S7-1500 controller family offers extensive trace functions for all CPU tags.
In addition to drive integration, the SIMATIC S7-1500 has a PID compact closed-loop
controller; easy-to-configure blocks allow automatic optimization of the controller parameters
for optimized control quality.
Technology modules also implement functions such as high-speed counting, position
detection and measuring functions and pulse generators (PWM and frequency output). In
compact CPU 1511C-1 PN and CPU 1512C-1 PN CPUs, these functions are already
integrated and require no additional technology modules.
SIWAREX is a versatile and flexible weighing module, which you can use as a static scale
for operation.
Due to the supported technology functions, the CPUs are suitable for controlling pumps,
fans, mixers, conveyor belts, lifting platforms, gate control systems, building management
systems, synchronized axes, etc.

Product overview
2.2 Applications of the S7-1500 CPU
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Security Integrated
In conjunction with STEP 7, each CPU offers password-based know-how protection against
unauthorized reading out or modification of the program blocks.
Copy protection provides reliable protection against unauthorized reproduction of program
blocks. With copy protection, individual blocks on the SIMATIC memory card can be tied to
its serial number so that the block can only be run if the configured memory card is inserted
into the CPU.
In addition, you can assign various access rights to different user groups in the controller
using four different authorization levels.
Improved manipulation protection allows changed or unauthorized transfers of engineering
data to be detected by the controller.
The use of an Ethernet CP (CP 1543-1) provides you with additional access protection
through a firewall or possibilities to establish secure VPN connections.
Safety Integrated
The fail-safe CPUs are intended for users who want to implement demanding standard and
fail-safe applications both centrally and decentrally.
These fail-safe CPUs allow the processing of standard and safety programs on a single
CPU. This allows fail-safe data to be evaluated in the standard user program. The integration
also provides the system advantages and the extensive functionality of SIMATIC for fail-safe
applications.
The fail-safe CPUs are certified for use in safety mode up to:
●Safety class (Safety Integrity Level) SIL 3 according to IEC 61508:2010
●Performance Level (PL) e and Category 4 according to ISO 13849-1:2006 or according to
EN ISO 13849-1:2008
Additional password protection for F-configuration and F-program is set up for IT security.
Design and handling
All CPUs of the SIMATIC S7-1500 product series feature a display with plain text
information. The display provides the user with information on the order numbers, firmware
version, and serial number of all connected modules. In addition, the IP address of the CPU
and other network settings can be adapted locally without a programming device. Errors
messages are immediately shown on the display in plain text, thus helping customers to
reduce downtimes.
Uniform front connectors for all modules and integrated potential bridges for flexible
formation of potential groups simplifies storage. Additional components such as circuit
breakers, relays, etc., can be installed quickly and easily, since a DIN rail is implemented in
the rail of the S7-1500. The CPUs of the SIMATIC S7-1500 product series can be expanded
centrally and in a modular fashion with signal modules. Space-saving expansion enables
flexible adaptation to each application.
The system cabling for digital signal modules enables fast and clear connection to sensors
and actuators from the field (fully modular connection consisting of front connector modules,
connection cables and I/O modules), as well as easy wiring inside the control cabinet
(flexible connection consisting of front connectors with assembled single conductors).

Product overview
2.3 How it works
CPU 1516-3 PN/DP (6ES7516-3AN01-0AB0)
18 Manual, 09/2016, A5E03461313-AD
System diagnostics and alarms
Integrated system diagnostics is activated by default for the CPUs. The different types of
diagnostics are configured instead of programmed. System diagnostics information is shown
uniformly and in plain text on the display of the CPU, in STEP 7, on the HMI and on the Web
server, even for alarms related to drives. This information is available in RUN mode, but also
in STOP mode of the CPU. The diagnostic information is updated automatically when you
configure new hardware components.
The CPU is available as a central interrupt server for 3 languages. The CPU, STEP 7 and
your HMI guarantee data consistency without additional engineering steps. The maintenance
work is easier.
2.3
How it works
Principle of operation
The CPU contains the operating system and executes the user program. The user program
is located on the SIMATIC memory card and is processed in the work memory of the CPU.
The connection to the process is centralized or distributed via PROFINET or PROFIBUS with
I/O modules.
The PROFINET interfaces on the CPU allow simultaneous communication with PROFINET
devices, PROFINET controllers, HMI devices, programming devices, other controllers and
other systems. CPU 1516-3 PN/DP supports operation as an IO controller and I-device.
Similarly to the PROFINET interface, the PROFIBUS interface available on the CPU allows
communication with other devices. When you use the interface as PROFIBUS DP interface,
the CPU on the PROFIBUS DP also assumes the role of a DP master.

Product overview
2.4 Properties
CPU 1516-3 PN/DP (6ES7516-3AN01-0AB0)
Manual, 09/2016, A5E03461313-AD 19
2.4
Properties
Article number
6ES7516-3AN01-0AB0
View of the module
The following figure shows the CPU 1516-3 PN/DP.
Figure 2-1 CPU 1516-3 PN/DP
Note
Protective film
Note that a protective film is attached to the display of the CPU when shipped from the
factory. Remove the protective film if necessary.

Product overview
2.4 Properties
CPU 1516-3 PN/DP (6ES7516-3AN01-0AB0)
20 Manual, 09/2016, A5E03461313-AD
Properties
CPU 1516-3 PN/DP has the following technical properties:
●Communication:
–Interfaces
CPU 1516-3 PN/DP has three interfaces. Two interfaces for PROFINET and one for
PROFIBUS.
The
1st PROFINET interface
(X1 P1, X1 P2) has two ports. In addition to PROFINET
basic functionality, it also supports PROFINET IO RT (real-time) and IRT (isochronous
real-time). PROFINET IO communication or real-time settings can be configured.
Port 1 and port 2 can also be used as ring ports for the configuration of redundant ring
structures in Ethernet.
The
2nd PROFINET interface
(X2 P1) has one port. In addition to PROFINET basic
functionality, its also supports PROFINET IO RT (real-time). The basic functionality of
PROFINET supports HMI communication, communication with the configuration
system, communication with a higher-level network (backbone, router, Internet) and
communication with another machine or automation cell.
Note
Special consideration when PROFINET IO communication is configured on the 2nd
PROFINET interface (X2 P1)
If you configure PROFINET IO communication at the CPU (as of FW version V2.0) on
the 2nd PROFINET interface (X2
P1) (operation as IO controller or IO device),
additional system load occurs. You can find additional information in the Cycle and
Respons
e Times (http://support.automation.siemens.com/WW/view/en/59191792)
Function Manual.
Note
IP subnets
The IP subnets of the two interfaces must be different. This means that t
he subnets of
the IP addresses of the two interfaces must differ from each other.
The
3rd interface
(X3) is used to connect to a PROFIBUS network. When you use the
interface as PROFIBUS DP interface, the CPU is the DP master in this case. The
CPU cannot assume the role of a DP slave.
–OPC UA
With OPC UA, data is exchanged via an open and vendor-neutral communication
protocol. The CPU, as OPC UA server, can communicate with OPC UA clients such
as HMI panels, SCADA systems, etc.