Siemens S7-1200 TELECONTROL User guide

S7-1200 Programmable controller
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SIMATIC
S7
S7-1200 Programmable controller
System Manual
03/2014
A5E02486680
-AG
Preface
Product overview
1
STEP 7 programming
software
2
Installation
3
PLC concepts
4
Device configuration
5
Programming concepts
6
Basic instructions
7
Extended instructions
8
Technology instructions
9
Communication
10
Web server
11
Communication processor
and Modbus TCP
12
Teleservice communication
(SMTP email)
13
Online and diagnostic tools
14
SM 1278 4xIO-Link Master
15
Technical specifications
A
Calculating a power budget
B
Order numbers
C
Exchanging a V3.0 CPU for
a V4.0 CPU
D

Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
Order number: 6ES7298-8FA30-8BH0
Ⓟ
12/2013 Technical data subject to change
Copyright © Siemens AG 2014.
All rights reserved
Legal information
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DANGER
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WARNING
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CAUTION
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NOTICE
indicates that property damage can result if proper precautions are not taken.
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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.
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avoiding potential hazards when working with these products/systems.
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WARNING
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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.

S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG 3
Preface
Purpose of the manual
The S7-1200 series is a line of programmable logic controllers (PLCs) that can control a
variety of automation applications. Compact design, low cost, and a powerful instruction set
make the S7-1200 a perfect solution for controlling a wide variety of applications. The S7-
1200 models and the Windows-based STEP 7 programming tool (Page 35) give you the
flexibility you need to solve your automation problems.
This manual provides information about installing and programming the S7-1200 PLCs and
is designed for engineers, programmers, installers, and electricians who have a general
knowledge of programmable logic controllers.
Required basic knowledge
To understand this manual, it is necessary to have a general knowledge of automation and
programmable logic controllers.
Scope of the manual
This manual describes the following products:
●STEP 7 V13 Basic and Professional (Page 35)
●S7-1200 CPU firmware release V4.0
For a complete list of the S7-1200 products described in this manual, refer to the technical
specifications (Page 829).
Certification, CE label, C-Tick, and other standards
Refer to the technical specifications (Page 829) for more information.
Service and support
In addition to our documentation, Siemens offers technical expertise on the Internet and on
the customer support web site (http://www.siemens.com/automation/).
Contact your Siemens distributor or sales office for assistance in answering any technical
questions, for training, or for ordering S7 products. Because your sales representatives are
technically trained and have the most specific knowledge about your operations, process
and industry, as well as about the individual Siemens products that you are using, they can
provide the fastest and most efficient answers to any problems you might encounter.

Preface
S7-1200 Programmable controller
4System Manual, 03/2014, A5E02486680-AG
Documentation and information
S7-1200 and STEP 7 provide a variety of documentation and other resources for finding the
technical information that you require.
●The S7-1200 system manual provides specific information about the operation,
programming, and the specifications for the complete S7-1200 product family. In addition
to the system manual, the S7-1200 Easy Book provides a more general overview to the
capabilities of the S7-1200 family.
Both the system manual and the Easy Book are available as electronic (PDF) manuals.
The electronic manuals can be downloaded from the customer support web site and can
also be found on the documentation disk that ships with every S7-1200 CPU.
●The online STEP 7 information system provides immediate access to the conceptual
information and specific instructions that describe the operation and functionality of the
programming package and basic operation of SIMATIC CPUs.
●My Documentation Manager accesses the electronic (PDF) versions of the SIMATIC
documentation set, including the system manual, the Easy Book, and the STEP 7
information system. With My Documentation Manager, you can drag and drop topics from
various documents to create your own custom manual.
The customer support entry portal (http://support.automation.siemens.com) provides a
link to My Documentation Manager under mySupport.
●The customer support web site also provides podcasts, FAQs, and other helpful
documents for S7-1200 and STEP 7. The podcasts utilize short educational video
presentations that focus on specific features or scenarios in order to demonstrate the
interactions, convenience, and efficiency provided by STEP 7. Visit the following web
sites to access the collection of podcasts:
–STEP 7 Basic web page (http://www.automation.siemens.com/mcms/simatic-
controller-software/en/step7/step7-basic/Pages/Default.aspx)
–STEP 7 Professional web page (http://www.automation.siemens.com/mcms/simatic-
controller-software/en/step7/step7-professional/Pages/Default.aspx)
●You can also follow or join product discussions on the Service & Support technical forum
(https://www.automation.siemens.com/WW/forum/guests/Conferences.aspx?Language=e
n&siteid=csius&treeLang=en&groupid=4000002&extranet=standard&viewreg=WW&nodei
d0=34612486). These forums allow you to interact with various product experts.
–Forum for S7-1200
(https://www.automation.siemens.com/WW/forum/guests/Conference.aspx?SortField=
LastPostDate&SortOrder=Descending&ForumID=258&Language=en&onlyInternet=Fa
lse)
–Forum for STEP 7 Basic
(https://www.automation.siemens.com/WW/forum/guests/Conference.aspx?SortField=
LastPostDate&SortOrder=Descending&ForumID=265&Language=en&onlyInternet=Fa
lse)

Preface
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG 5
Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, solutions, machines, equipment and/or networks. They are
important components in a holistic industrial security concept. With this in mind, Siemens’
products and solutions undergo continuous development. Siemens recommends strongly
that you regularly check for product updates.
For the secure operation of Siemens products and solutions, it is necessary to take suitable
preventive action (e.g. cell protection concept) and integrate each component into a holistic,
state-of-the-art industrial security concept. Third-party products that may be in use should
also be considered. You can find more information about industrial security on the Internet
(http://www.siemens.com/industrialsecurity).
To stay informed about product updates as they occur, sign up for a product-specific
newsletter. You can find more information on the Internet
(http://support.automation.siemens.com).

Preface
S7-1200 Programmable controller
6System Manual, 03/2014, A5E02486680-AG

S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG 7
Table of contents
Preface ................................................................................................................................................... 3
1 Product overview .................................................................................................................................. 23
1.1 Introducing the S7-1200 PLC.......................................................................................................23
1.2 Expansion capability of the CPU..................................................................................................26
1.3 S7-1200 modules.........................................................................................................................29
1.4 New features ................................................................................................................................30
1.5 Basic HMI panels .........................................................................................................................32
2 STEP 7 programming software ............................................................................................................. 35
2.1 System requirements ...................................................................................................................36
2.2 Different views to make the work easier ......................................................................................37
2.3 Easy-to-use tools .........................................................................................................................38
2.3.1 Inserting instructions into your user program...............................................................................38
2.3.2 Accessing instructions from the "Favorites" toolbar.....................................................................38
2.3.3 Creating a complex equation with a simple instruction................................................................39
2.3.4 Adding inputs or outputs to a LAD or FBD instruction .................................................................41
2.3.5 Expandable instructions...............................................................................................................42
2.3.6 Selecting a version for an instruction ...........................................................................................42
2.3.7 Modifying the appearance and configuration of STEP 7 .............................................................43
2.3.8 Dragging and dropping between editors......................................................................................43
2.3.9 Changing the operating mode of the CPU...................................................................................44
2.3.10 Changing the call type for a DB ...................................................................................................45
2.3.11 Temporarily disconnecting devices from a network.....................................................................46
2.3.12 Virtual unplugging of devices from the configuration...................................................................47
3 Installation ............................................................................................................................................ 49
3.1 Guidelines for installing S7-1200 devices....................................................................................49
3.2 Power budget ...............................................................................................................................51
3.3 Installation and removal procedures ............................................................................................53
3.3.1 Mounting dimensions for the S7-1200 devices............................................................................53
3.3.2 Installing and removing the CPU .................................................................................................56
3.3.3 Installing and removing an SB, CB, or BB ...................................................................................58
3.3.4 Installing and removing an SM.....................................................................................................60
3.3.5 Installing and removing a CM or CP ............................................................................................62
3.3.6 Removing and reinstalling the S7-1200 terminal block connector...............................................63
3.3.7 Installing and removing the expansion cable...............................................................................64
3.3.8 TS (TeleService) adapter.............................................................................................................66
3.3.8.1 Connecting the TeleService adapter............................................................................................66
3.3.8.2 Installing the SIM card .................................................................................................................67
3.3.8.3 Installing the TS adapter unit on a DIN rail ..................................................................................69
3.3.8.4 Installing the TS adapter on a panel ............................................................................................69

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3.4 Wiring guidelines......................................................................................................................... 70
4 PLC concepts ....................................................................................................................................... 77
4.1 Execution of the user program.................................................................................................... 77
4.1.1 Operating modes of the CPU...................................................................................................... 81
4.1.2 Processing the scan cycle in RUN mode.................................................................................... 85
4.1.3 Organization blocks (OBs) .......................................................................................................... 85
4.1.3.1 Program cycle OB ....................................................................................................................... 86
4.1.3.2 Startup OB................................................................................................................................... 86
4.1.3.3 Time delay interrupt OB .............................................................................................................. 87
4.1.3.4 Cyclic interrupt OB ...................................................................................................................... 87
4.1.3.5 Hardware interrupt OB ................................................................................................................ 87
4.1.3.6 Time error interrupt OB ............................................................................................................... 88
4.1.3.7 Diagnostic error interrupt OB ...................................................................................................... 89
4.1.3.8 Pull or plug of modules OB ......................................................................................................... 91
4.1.3.9 Rack or station failure OB ........................................................................................................... 92
4.1.3.10 Time of day OB ........................................................................................................................... 92
4.1.3.11 Status OB.................................................................................................................................... 93
4.1.3.12 Update OB................................................................................................................................... 93
4.1.3.13 Profile OB.................................................................................................................................... 94
4.1.3.14 Event execution priorities and queuing ....................................................................................... 94
4.1.4 Monitoring and configuring the cycle time................................................................................... 97
4.1.5 CPU memory............................................................................................................................... 99
4.1.5.1 System and clock memory ........................................................................................................ 101
4.1.6 Diagnostics buffer ..................................................................................................................... 103
4.1.7 Time of day clock ...................................................................................................................... 104
4.1.8 Configuring the outputs on a RUN-to-STOP transition ............................................................. 104
4.2 Data storage, memory areas, I/O and addressing .................................................................... 105
4.2.1 Accessing the data of the S7-1200 ........................................................................................... 105
4.3 Processing of analog values ..................................................................................................... 110
4.4 Data types ................................................................................................................................. 110
4.4.1 Bool, Byte, Word, and DWord data types ................................................................................. 111
4.4.2 Integer data types ..................................................................................................................... 112
4.4.3 Floating-point real data types.................................................................................................... 112
4.4.4 Time and Date data types ......................................................................................................... 113
4.4.5 Character and String data types ............................................................................................... 114
4.4.6 Array data type.......................................................................................................................... 116
4.4.7 Data structure data type............................................................................................................ 117
4.4.8 PLC data type ........................................................................................................................... 117
4.4.9 Pointer data types ..................................................................................................................... 118
4.4.9.1 "Pointer" pointer data type ........................................................................................................ 118
4.4.9.2 "Any" pointer data type.............................................................................................................. 119
4.4.9.3 "Variant" pointer data type ........................................................................................................ 120
4.4.10 Accessing a "slice" of a tagged data type ................................................................................. 121
4.4.11 Accessing a tag with an AT overlay .......................................................................................... 122
4.5 Using a memory card ................................................................................................................ 124
4.5.1 Inserting a memory card in the CPU......................................................................................... 125
4.5.2 Configuring the startup parameter of the CPU before copying the project to the memory
card ........................................................................................................................................... 127
4.5.3 Transfer card............................................................................................................................. 127

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4.5.4 Program card .............................................................................................................................130
4.5.5 Firmware update ........................................................................................................................133
4.6 Recovery from a lost password..................................................................................................136
5 Device configuration............................................................................................................................ 137
5.1 Inserting a CPU..........................................................................................................................138
5.2 Detecting the configuration for an unspecified CPU ..................................................................140
5.3 Adding modules to the configuration .........................................................................................141
5.4 Changing a device .....................................................................................................................142
5.5 Configuring the operation of the CPU ........................................................................................142
5.5.1 Overview ....................................................................................................................................142
5.5.2 Configuring digital input filter times ............................................................................................144
5.5.3 Pulse catch.................................................................................................................................146
5.6 Configuring the parameters of the modules...............................................................................147
5.7 Configuring the CPU for communication ...................................................................................149
5.7.1 Creating a network connection ..................................................................................................149
5.7.2 Configuring the Local/Partner connection path..........................................................................150
5.7.3 Parameters for the PROFINET connection ...............................................................................153
5.7.4 Assigning Internet Protocol (IP) addresses ...............................................................................155
5.7.4.1 Assigning IP addresses to programming and network devices .................................................155
5.7.4.2 Checking the IP address of your programming device..............................................................157
5.7.4.3 Assigning an IP address to a CPU online..................................................................................158
5.7.4.4 Configuring an IP address for a CPU in your project.................................................................159
5.7.5 Testing the PROFINET network ................................................................................................162
5.7.6 Locating the Ethernet (MAC) address on the CPU....................................................................163
5.7.7 Configuring Network Time Protocol synchronization.................................................................165
5.7.8 PROFINET device start-up time, naming, and address assignment .........................................166
6 Programming concepts ....................................................................................................................... 169
6.1 Guidelines for designing a PLC system.....................................................................................169
6.2 Structuring your user program ...................................................................................................170
6.3 Using blocks to structure your program .....................................................................................172
6.3.1 Organization block (OB).............................................................................................................172
6.3.2 Function (FC) .............................................................................................................................174
6.3.3 Function block (FB)....................................................................................................................175
6.3.4 Data block (DB)..........................................................................................................................176
6.3.5 Creating reusable code blocks...................................................................................................177
6.4 Understanding data consistency................................................................................................178
6.5 Programming language..............................................................................................................179
6.5.1 Ladder logic (LAD) .....................................................................................................................180
6.5.2 Function Block Diagram (FBD) ..................................................................................................181
6.5.3 SCL ............................................................................................................................................181
6.5.4 EN and ENO for LAD, FBD and SCL.........................................................................................188
6.6 Protection ...................................................................................................................................190
6.6.1 Access protection for the CPU...................................................................................................190
6.6.2 Know-how protection .................................................................................................................193

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10 System Manual, 03/2014, A5E02486680-AG
6.6.3 Copy protection ......................................................................................................................... 195
6.7 Downloading the elements of your program ............................................................................. 196
6.8 Uploading from the CPU ........................................................................................................... 197
6.8.1 Copying elements of the project ............................................................................................... 197
6.8.2 Using the compare function ...................................................................................................... 198
6.9 Debugging and testing the program.......................................................................................... 198
6.9.1 Monitor and modify data in the CPU ......................................................................................... 198
6.9.2 Watch tables and force tables................................................................................................... 199
6.9.3 Cross reference to show usage ................................................................................................ 199
6.9.4 Call structure to examine the calling hierarchy ......................................................................... 201
7 Basic instructions.................................................................................................................................203
7.1 Bit logic operations.................................................................................................................... 203
7.1.1 Bit logic instructions .................................................................................................................. 203
7.1.2 Set and reset instructions.......................................................................................................... 206
7.1.3 Positive and negative edge instructions.................................................................................... 209
7.2 Timer operations ....................................................................................................................... 212
7.3 Counter operations.................................................................................................................... 220
7.4 Comparator operations ............................................................................................................. 226
7.4.1 Compare values instructions..................................................................................................... 226
7.4.2 IN_Range (Value within range) and OUT_Range (Value outside range) instructions .............. 227
7.4.3 OK (Check validity) and NOT_OK (Check invalidity) instructions............................................. 228
7.5 Math functions ........................................................................................................................... 229
7.5.1 CALCULATE (Calculate) instruction ......................................................................................... 229
7.5.2 Add, subtract, multiply and divide instructions .......................................................................... 230
7.5.3 MOD (return remainder of division) instruction ......................................................................... 231
7.5.4 NEG (Create twos complement) instruction.............................................................................. 232
7.5.5 INC (Increment) and DEC (Decrement) instructions ................................................................ 232
7.5.6 ABS (Form absolute value) instruction ..................................................................................... 233
7.5.7 MIN (Get minimum) and MAX (Get maximum) instructions...................................................... 234
7.5.8 LIMIT (Set limit value) instruction.............................................................................................. 235
7.5.9 Exponent, logarithm, and trigonometry instructions.................................................................. 236
7.6 Move operations........................................................................................................................ 238
7.6.1 MOVE (Move value), MOVE_BLK (Move block), and UMOVE_BLK (Move block
uninterrruptible) instructions...................................................................................................... 238
7.6.2 FieldRead (Read field) and FieldWrite (Write field) instructions ............................................... 240
7.6.3 FILL_BLK (Fill block) and UFILL_BLK (Fill block uninterruptible) instructions.......................... 242
7.6.4 SWAP (Swap bytes) instruction ................................................................................................ 243
7.7 Conversion operations .............................................................................................................. 244
7.7.1 CONV (Convert value) instruction............................................................................................. 244
7.7.2 Conversion instructions for SCL ............................................................................................... 245
7.7.3 ROUND (Round numerical value) and TRUNC (Truncate numerical value) instructions......... 249
7.7.4 CEIL and FLOOR (Generate next higher and lower integer from floating-point number)
instructions ................................................................................................................................ 250
7.7.5 SCALE_X (Scale) and NORM_X (Normalize) instructions ....................................................... 251
7.8 Program control operations....................................................................................................... 254
7.8.1 JMP (Jump if RLO = 1), JMPN (Jump if RLO = 0), and Label (Jump label) instructions.......... 254