Siemens SIMATIC S7-1200 User manual

Easy Book
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SIMATIC
S7-1200
Easy Book
Manual
03/2014
A5E02486774
-AF
Preface
Introducing the powerful and
flexible S7-1200
1
STEP 7 makes the work
easy
2
Getting started
3
PLC concepts made easy
4
Easy to create the device
configuration
5
Programming made easy
6
Easy to communicate
between devices
7
PID is easy
8
Web server for easy Internet
connectivity
9
Motion control is easy
10
Easy to use the online tools
11
IO-Link is easy
12
Technical specifications
A
Exchanging a V3.0 CPU for
a V4.0 CPU
B

Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
Order number: 6ES7298-8FA30-8BQ0
Ⓟ
12/2013 Technical data subject to change
Copyright © Siemens AG 2014.
All rights reserved
Legal information
Warning notice system
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.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
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
Welcome to the world of S7-1200. The SIMATIC S7-1200 compact controller is the modular,
space-saving controller for small automation systems that require either simple or advanced
functionality for logic, HMI and networking. The compact design, low cost, and powerful
features make the S7-1200 a perfect solution for controlling small applications.
As part of the SIMATIC commitment to "totally integrated automation" (TIA), the S7-1200
product family and the TIA Portal programming software give you the flexibility you need to
solve your automation needs.
The S7-1200 helps to make the most challenging tasks easy!
The SIMATIC S7-1200 controller solution, designed for the "compact" controller class, is
comprised of the SIMATIC S7-1200 controller and SIMATIC HMI Basic panels that can both
be programmed with the TIA Portal engineering software. The ability to program both
devices using the same engineering software significantly reduces development costs. The
TIA Portal includes STEP 7 for S7-1200 programming and WinCC for designing Basic panel
projects.
The S7
-1200 compact controller includes:
•
Built-in PROFINET
•
High-speed I/O capable of motion control, onboard
analog inputs to minimize space requirements and
the need for additional I/O, 4 pulse generators for
pulse-train and pulse-width applications (Page 67) ,
and up to 6 high-speed counters
•
On-board I/O points built into the CPU modules
provide from 6 to 14 input points and from 4 to 10
output points.
Signal modules for DC, relay, or
analog I/O
expand the number of I/O points, and
innovative signal boards snap onto the front
of the CPU
to provide additional I/O
(Page
18).
The
SIMATIC HMI Basic panels (Page 22)
were designed specifically for the S7
-1200.
This Easy Book provides an introduction to
the S7
-1200 PLC. The following pages offer
an overview of the many features and
capabilities of the devices.
For additional information, refer to the
S7-1200 programmable controller system manual . For
information about UL and FM certification, CE labeling, C-Tick and other standards, refer to
the Technical specifications (Page 281).

Preface
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This manual describes the following products:
●STEP 7 V13 SP1 Basic and Professional
●S7-1200 CPU firmware release V4.0
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
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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.
Security information
Siemens provides automation and drive products with industrial security functions that
support the secure operation of plants or machines. They are an important component in a
holistic industrial security concept. With this in mind, our products undergo continuous
development. We therefore recommend that you keep yourself informed with respect to our
product updates. Please find further information and newsletters on this subject at:
(http://support.automation.siemens.com)
To ensure the secure operation of a plant or machine it is also necessary to take suitable
preventive action (e.g. cell protection concept) and to integrate the automation and drive
components into a state-of-the-art holistic industrial security concept for the entire plant or
machine. Any third-party products that may be in use must also be taken into account.
Please find further information at: (http://www.siemens.com/industrialsecurity)

Preface
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Table of contents
Preface................................................................................................................................................... 3
1 Introducing the powerful and flexible S7-1200 ....................................................................................... 15
1.1 Introducing the S7-1200 PLC.......................................................................................................15
1.2 Expansion capability of the CPU..................................................................................................18
1.3 S7-1200 modules.........................................................................................................................21
1.4 Basic HMI panels.........................................................................................................................22
1.5 Mounting dimensions and clearance requirements.....................................................................23
1.6 New features................................................................................................................................27
2 STEP 7 makes the work easy ............................................................................................................... 29
2.1 Easy to insert instructions into your user program.......................................................................30
2.2 Easy access to your favorite instructions from a toolbar .............................................................30
2.3 Easy to add inputs or outputs to LAD and FBD instructions........................................................31
2.4 Expandable instructions...............................................................................................................31
2.5 Easy to change the operating mode of the CPU .........................................................................32
2.6 Easy to modify the appearance and configuration of STEP 7.....................................................33
2.7 Project and global libraries for easy access ................................................................................33
2.8 Easy to select a version of an instruction ....................................................................................34
2.9 Easy to drag and drop between editors.......................................................................................34
2.10 Changing the call type for a DB...................................................................................................35
2.11 Temporarily disconnecting devices from a network.....................................................................36
2.12 Easy to virtually "unplug" modules without losing the configuration............................................37
3 Getting started...................................................................................................................................... 39
3.1 Create a project............................................................................................................................39
3.2 Create tags for the I/O of the CPU...............................................................................................40
3.3 Create a simple network in your user program............................................................................41
3.4 Use the PLC tags in the tag table for addressing the instructions...............................................43
3.5 Add a "box" instruction.................................................................................................................44
3.6 Use the CALCULATE instruction for a complex mathematical equation.....................................45
3.7 Add an HMI device to the project.................................................................................................47
3.8 Create a network connection between the CPU and HMI device................................................48
3.9 Create an HMI connection to share tags .....................................................................................48

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3.10 Create an HMI screen................................................................................................................. 49
3.11 Select a PLC tag for the HMI element ........................................................................................ 50
4 PLC concepts made easy ..................................................................................................................... 51
4.1 Tasks performed every scan cycle ............................................................................................. 51
4.2 Operating modes of the CPU...................................................................................................... 52
4.3 Execution of the user program.................................................................................................... 53
4.3.1 Processing the scan cycle in RUN mode.................................................................................... 54
4.3.2 OBs help you structure your user program................................................................................. 55
4.3.3 Event execution priorities and queuing....................................................................................... 55
4.4 Memory areas, addressing and data types................................................................................. 58
4.4.1 Data types supported by the S7-1200 ........................................................................................ 60
4.4.2 Addressing memory areas.......................................................................................................... 62
4.4.3 Accessing a "slice" of a tagged data type................................................................................... 64
4.4.4 Accessing a tag with an AT overlay............................................................................................ 65
4.5 Pulse outputs .............................................................................................................................. 67
5 Easy to create the device configuration................................................................................................. 71
5.1 Detecting the configuration for an unspecified CPU................................................................... 72
5.2 Adding a CPU to the configuration.............................................................................................. 73
5.3 Changing a device ...................................................................................................................... 74
5.4 Adding modules to the configuration........................................................................................... 74
5.5 Configuring the operation of the CPU and modules ................................................................... 76
5.5.1 System memory and clock memory provide standard functionality............................................ 77
5.6 Configuring the IP address of the CPU....................................................................................... 80
5.7 Protecting access to the CPU or code block is easy .................................................................. 82
5.7.1 Know-how protection................................................................................................................... 84
5.7.2 Copy protection........................................................................................................................... 85
6 Programming made easy...................................................................................................................... 87
6.1 Easy to design your user program.............................................................................................. 87
6.1.1 Use OBs for organizing your user program ................................................................................ 89
6.1.2 FBs and FCs make programming the modular tasks easy......................................................... 90
6.1.3 Data blocks provide easy storage for program data................................................................... 92
6.1.4 Creating a new code block.......................................................................................................... 92
6.1.5 Creating reusable code blocks.................................................................................................... 93
6.1.6 Calling a code block from another code block............................................................................ 94
6.2 Easy-to-use programming languages......................................................................................... 94
6.2.1 Ladder logic (LAD) ...................................................................................................................... 94
6.2.2 Function Block Diagram (FBD) ................................................................................................... 95
6.2.3 SCL overview.............................................................................................................................. 96
6.2.4 SCL program editor..................................................................................................................... 96
6.3 Powerful instructions make programming easy.......................................................................... 98
6.3.1 Providing the basic instructions you expect................................................................................ 98
6.3.2 Compare and Move instructions ............................................................................................... 100
6.3.3 Conversion instructions............................................................................................................. 101

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6.3.4 Math made easy with the Calculate instruction .........................................................................103
6.3.5 Timers ........................................................................................................................................104
6.3.6 Counters.....................................................................................................................................109
6.3.7 Pulse-width modulation (PWM)..................................................................................................111
6.4 Easy to create data logs ............................................................................................................112
6.5 Easy to monitor and test your user program..............................................................................114
6.5.1 Watch tables and force tables....................................................................................................114
6.5.2 Cross reference to show usage.................................................................................................115
6.5.3 Call structure to examine the calling hierarchy..........................................................................116
6.5.4 Diagnostic instructions to monitor the hardware........................................................................117
6.5.4.1 Reading the states of the LEDs on the CPU .............................................................................117
6.5.4.2 Instructions for reading the diagnostic status of the devices.....................................................117
6.6 High-speed counter (HSC).........................................................................................................118
6.6.1 Operation of the high-speed counter .........................................................................................119
6.6.2 Configuration of the HSC...........................................................................................................125
7 Easy to communicate between devices............................................................................................... 127
7.1 Creating a network connection ..................................................................................................128
7.2 Communication options .............................................................................................................129
7.3 Number of asynchronous communication connections.............................................................131
7.4 PROFINET and PROFIBUS instructions...................................................................................132
7.5 PROFINET.................................................................................................................................133
7.5.1 Open user communication.........................................................................................................133
7.5.1.1 Ad hoc mode..............................................................................................................................134
7.5.1.2 Connection IDs for the Open user communication instructions.................................................134
7.5.1.3 Parameters for the PROFINET connection ...............................................................................137
7.5.2 Configuring the Local/Partner connection path..........................................................................140
7.6 PROFIBUS.................................................................................................................................142
7.6.1 Communications services of the PROFIBUS CMs....................................................................144
7.6.2 Reference to the PROFIBUS CM user manuals........................................................................145
7.6.3 Adding the CM 1243-5 (DP master) module and a DP slave....................................................145
7.6.4 Assigning PROFIBUS addresses to the CM 1243-5 module and DP slave..............................146
7.7 AS-i ............................................................................................................................................148
7.7.1 Adding the AS-i master CM 1243-2 and AS-i slave...................................................................149
7.7.2 Assigning an AS-i address to an AS-i slave ..............................................................................150
7.8 S7 communication .....................................................................................................................153
7.8.1 GET and PUT instructions .........................................................................................................153
7.8.2 Creating an S7 connection.........................................................................................................154
7.8.3 GET/PUT connection parameter assignment............................................................................155
7.9 GPRS.........................................................................................................................................156
7.9.1 Connection to a GSM network...................................................................................................156
7.10 PtP, USS, and Modbus communication protocols.....................................................................163
7.10.1 Point-to-point communication ....................................................................................................163
7.10.2 Using the serial communication interfaces ................................................................................163
7.10.3 PtP instructions..........................................................................................................................164
7.10.4 USS instructions.........................................................................................................................165

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7.10.5 Modbus instructions .................................................................................................................. 167
8 PID is easy ..........................................................................................................................................169
8.1 Inserting the PID instruction and technology object.................................................................. 171
8.2 PID_Compact instruction........................................................................................................... 173
8.3 PID_Compact instruction ErrorBit parameters.......................................................................... 177
8.4 PID_3Step instruction................................................................................................................ 179
8.5 PID_3Step instruction ErrorBit parameters............................................................................... 186
8.6 Configuring the PID controller................................................................................................... 188
8.7 Commissioning the PID controller............................................................................................. 190
9 Web server for easy Internet connectivity.............................................................................................193
9.1 Easy to use the standard Web pages....................................................................................... 194
9.2 Constraints that can affect the use of the Web server.............................................................. 196
9.2.1 Feature restrictions when the Internet options disable JavaScript ........................................... 197
9.2.2 Feature restrictions when the Internet options do not allow cookies........................................ 198
9.3 Easy to create user-defined web pages.................................................................................... 198
9.3.1 Easy to create custom "user-defined" web pages .................................................................... 198
9.3.2 Constraints specific to user-defined Web pages....................................................................... 199
9.3.3 Configuration of a user-defined Web page ............................................................................... 200
9.3.4 Using the WWW instruction ...................................................................................................... 201
10 Motion control is easy ..........................................................................................................................203
10.1 Phasing ..................................................................................................................................... 208
10.2 Configuring a pulse generator................................................................................................... 210
10.3 Configuring the axis .................................................................................................................. 211
10.4 Configuring the TO_CommandTable_PTO............................................................................... 214
10.5 Motion control instructions ........................................................................................................ 217
10.5.1 MC instruction overview............................................................................................................ 217
10.5.2 MC_Power (Release/block axis) instruction.............................................................................. 217
10.5.3 MC_Reset (Confirm error) instruction ....................................................................................... 221
10.5.4 MC_Home (Home axis) instruction ........................................................................................... 222
10.5.5 MC_Halt (Pause axis) instruction.............................................................................................. 224
10.5.6 MC_MoveAbsolute (Position axis absolutely) instruction ......................................................... 226
10.5.7 MC_MoveRelative (Position axis relatively) instruction ............................................................ 228
10.5.8 MC_MoveVelocity (Move axis at predefined velocity) instruction............................................. 230
10.5.9 MC_MoveJog (Move axis in jog mode) instruction ................................................................... 233
10.5.10 MC_CommandTable (Run axis commans as movement sequence) instruction...................... 235
10.5.11 MC_ChangeDynamic (Change dynamc settings for the axis) instruction................................. 237
10.5.12 MC_WriteParam (write parameters of a technology object) instruction.................................... 239
10.5.13 MC_ReadParam instruction (read parameters of a technology object) instruction .................. 241
10.6 Operation of motion control for S7-1200................................................................................... 242
10.6.1 CPU outputs used for motion control........................................................................................ 242
10.6.2 Hardware and software limit switches for motion control.......................................................... 244
10.6.3 Homing...................................................................................................................................... 247
10.6.3.1 Homing the axis ........................................................................................................................ 247

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10.6.3.2 Configuration of homing parameters .........................................................................................249
10.6.3.3 Sequence for active homing ......................................................................................................251
10.7 Commissioning...........................................................................................................................252
11 Easy to use the online tools................................................................................................................. 257
11.1 Going online and connecting to a CPU......................................................................................257
11.2 Interacting with the online CPU..................................................................................................258
11.3 Going online to monitor the values in the CPU..........................................................................259
11.4 Displaying status of the user program is easy...........................................................................260
11.5 Using a watch table for monitoring the CPU..............................................................................260
11.6 Using the force table..................................................................................................................261
11.7 Capturing the online values of a DB to reset the start values....................................................264
11.8 Copying elements of the project ................................................................................................265
11.9 Comparing offline and online CPUs...........................................................................................266
11.10 Displaying the diagnostic events................................................................................................267
11.11 Setting the IP address and time of day......................................................................................267
11.12 Resetting to factory settings.......................................................................................................268
11.13 Updating firmware......................................................................................................................269
11.14 Downloading an IP address to an online CPU...........................................................................270
11.15 Using the "unspecified CPU" to upload the hardware configuration..........................................271
11.16 Downloading in RUN mode........................................................................................................272
11.16.1 Changing your program in RUN mode ......................................................................................273
11.17 Tracing and recording CPU data on trigger conditions..............................................................274
12 IO-Link is easy.................................................................................................................................... 275
12.1 Overview of IO-Link technology.................................................................................................275
12.2 Components of an IO-Link system.............................................................................................275
12.3 After power-up............................................................................................................................275
12.4 IO-Link protocol..........................................................................................................................276
12.5 Configuration in the fieldbus ......................................................................................................276
12.6 IO-Link and your STEP 7 program.............................................................................................276
12.7 The SM 1278 4xIO-Link Master.................................................................................................277
A Technical specifications ...................................................................................................................... 281
A.1 General technical specifications ................................................................................................281
A.2 CPU modules.............................................................................................................................289
A.3 Digital I/O modules.....................................................................................................................293
A.3.1 SB 1221, SB 1222, and SB 1223 digital input/output (DI, DQ, and DI/DQ)...............................293
A.3.2 SM 1221 digital input (DI) ..........................................................................................................296
A.3.3 SM 1222 digital output (DQ) ......................................................................................................297

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A.3.4 SM 1223 VDC digital input/output (DI / DQ) ............................................................................. 299
A.3.5 SM 1223 120/230 VAC input / Relay output............................................................................. 300
A.4 Specifications for the digital inputs and outputs........................................................................ 302
A.4.1 24 VDC digital inputs (DI).......................................................................................................... 302
A.4.2 120/230 VAC digital AC inputs.................................................................................................. 303
A.4.3 Digital outputs (DQ)................................................................................................................... 304
A.5 Analog I/O modules................................................................................................................... 306
A.5.1 SB 1231 and SB 1232 analog input (AI) and output (AQ)........................................................ 306
A.5.2 SM 1231 analog input (AI) ........................................................................................................ 307
A.5.3 SM 1232 analog output (AQ) .................................................................................................... 308
A.5.4 SM 1234 analog input/output (AI/AQ)....................................................................................... 308
A.5.5 Wiring diagrams for SM 1231 (AI), SM 1232 (AQ), and SM 1234 (AI/AQ)............................... 309
A.6 BB 1297 battery board.............................................................................................................. 310
A.7 Specifications for the analog I/O............................................................................................... 311
A.7.1 Specifications for the analog inputs (CPU, SM, and SB).......................................................... 311
A.7.2 Input (AI) measurement ranges for voltage and current........................................................... 312
A.7.3 Step response for the analog inputs (AI) .................................................................................. 313
A.7.4 Sample time and update times for the analog inputs................................................................ 314
A.7.5 Specifications for the analog outputs........................................................................................ 315
A.7.6 Output (AQ) measurement ranges for voltage and current ...................................................... 315
A.8 RTD and Thermocouple modules............................................................................................. 317
A.8.1 SB 1231 RTD and SB 1231 TC specifications.......................................................................... 318
A.8.2 SM 1231 RTD specifications..................................................................................................... 319
A.8.3 SM 1231 TC specifications ....................................................................................................... 321
A.8.4 Analog input specifications for RTD and TC (SM and SB) ....................................................... 323
A.8.5 Thermocouple type ................................................................................................................... 324
A.8.6 Thermocouple filter selection and update times ....................................................................... 325
A.8.7 RTD sensor type selection table............................................................................................... 326
A.8.8 RTD filter selection and update times....................................................................................... 327
A.9 Communication interfaces......................................................................................................... 328
A.9.1 PROFIBUS master/slave .......................................................................................................... 328
A.9.1.1 CM 1242-5 PROFIBUS slave.................................................................................................... 328
A.9.1.2 CM 1243-5 PROFIBUS master................................................................................................. 329
A.9.2 GPRS CP.................................................................................................................................. 331
A.9.2.1 Technical specifications of the CP 1242-7 GPRS .................................................................... 331
A.9.3 Teleservice (TS)........................................................................................................................ 334
A.9.4 RS485, RS232 and RS422 communication.............................................................................. 334
A.9.4.1 CB 1241 RS485 specifications.................................................................................................. 334
A.9.4.2 CM 1241 RS422/485 specifications.......................................................................................... 337
A.9.4.3 CM 1241 RS232 specifications................................................................................................. 338
A.10 Technology modules................................................................................................................. 339
A.10.1 SM 1278 4xIO-Link Master SM................................................................................................. 339
A.10.1.1 SM 1278 4xIO-Link Master signal module specifications ......................................................... 339
A.10.1.2 SM 1278 4xIO-Link Master SM wiring diagrams....................................................................... 342
A.11 Companion products................................................................................................................. 343
A.11.1 PM 1207 power module............................................................................................................ 343
A.11.2 CSM 1277 compact switch module........................................................................................... 343
A.11.3 CM CANopen module............................................................................................................... 344

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B Exchanging a V3.0 CPU for a V4.0 CPU............................................................................................. 345
B.1 Exchanging a V3.0 CPU for a V4.0 CPU...................................................................................345
Index................................................................................................................................................... 349

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Introducing the powerful and flexible S7-1200
1
1.1
Introducing the S7-1200 PLC
The S7-1200 controller provides the flexibility and power to control a wide variety of devices
in support of your automation needs. The compact design, flexible configuration, and
powerful instruction set combine to make the S7-1200 a perfect solution for controlling a
wide variety of applications.
The CPU combines a microprocessor, an integrated power supply, input and output circuits,
built-in PROFINET, high-speed motion control I/O, and on-board analog inputs in a compact
housing to create a powerful controller. After you download your program, the CPU contains
the logic required to monitor and control the devices in your application. The CPU monitors
the inputs and changes the outputs according to the logic of your user program, which can
include Boolean logic, counting, timing, complex math operations, and communications with
other intelligent devices.
The CPU provides a PROFINET port for communication over a PROFINET network.
Additional modules are available for communicating over PROFIBUS, GPRS, RS485 or
RS232 networks.
①
Power connector
②
Memory card slot under top
door
③
Removable user wiring
connectors (behind the
doors)
④
Status LEDs for the on
-
board I/O
⑤
PROFINET connector (on
the bottom of the CPU)
Several security features help protect access to both the CPU and the control program:
●Every CPU provides password protection (Page 82) that allows you to configure access
to the CPU functions.
●You can use "know-how protection" (Page 84) to hide the code within a specific block.
●You can use copy protection (Page 85) to bind your program to a specific memory card or
CPU.

Introducing the powerful and flexible S7-1200
1.1 Introducing the S7-1200 PLC
Easy Book
16 Manual, 03/2014, A5E02486774-AF
Table 1- 1 Comparing the CPU models
Feature
CPU 1211C
CPU 1212C
CPU 1214C
CPU 1215C
CPU 1217C
Physical size (mm)
90 x 100 x 75
90 x 100 x 75
110 x 100 x 75
130 x 100 x 75
150 x 100 x 75
User memory
Work
30 Kbytes
50 Kbytes
75 Kbytes
100 Kbytes
125 Kbytes
Load
1 Mbyte
1 Mbyte
4 Mbytes
4 Mbytes
4 Mbytes
Retentive
10 Kbytes
10 Kbytes
10 Kbytes
10 Kbytes
10 Kbytes
Local on-board
I/O Digital 6 inputs/4
outputs
8 inputs/6
outputs
14 inputs/10
outputs
14 inputs/10
outputs
14 inputs/10
outputs
Analog 2 inputs 2 inputs 2 inputs 2 inputs/2
outputs
2 inputs/2
outputs
Process image
size
Inputs (I)
1024 bytes
1024 bytes
1024 bytes
1024 bytes
1024 bytes
Outputs (Q)
1024 bytes
1024 bytes
1024 bytes
1024 bytes
1024 bytes
Bit memory (M)
4096 bytes
4096 bytes
8192 bytes
8192 bytes
8192 bytes
Signal module (SM) expansion
None
2
8
8
8
Signal board (SB), Battery board
(BB), or communication board
(CB)
1 1 1 1 1
Communication module (CM)
(left-side expansion)
3 3 3 3 3
High-speed
counters
Total
Up to 6 configured to use any built-in or SB inputs
1 MHz
--
--
--
--
Ib.2 to Ib.5
100/
1
80 kHz
Ia.0 to Ia.5
Ia.0 to Ia.5
Ia.0 to Ia.5
Ia.0 to Ia.5
Ia.0 to Ia.5
30/
1
20 kHz
--
Ia.6 to Ia.7
Ia.6 to Ib.5
Ia.6 to Ib.5
Ia.6 to Ib.1
Pulse outputs2
Total
Up to 4 configured to use any built-in or SB outputs
1 MHz
--
--
--
--
Qa.0 to Qa.3
100 kHz
Qa.0 to Qa.3
Qa.0 to Qa.3
Qa.0 to Qa.3
Qa.0 to Qa.3
Qa.4 to Qb.1
20 kHz
--
Qa.4 to Qa.5
Qa.4 to Qb.1
Qa.4 to Qb.1
--
Memory card
SIMATIC Memory card (optional)
Real time clock retention time
20 days, typ./12 day min. at 40 degrees C (maintenance-free Super Capacitor)
PROFINET
Ethernet communication port
1 1 1 2 2
Real math execution speed
2.3 μs/instruction
Boolean execution speed
0.08 μs/instruction
1
The slower speed is applicable when the HSC is configured for quadrature mode of operation.
2For CPU models with relay outputs, you must install a digital signal (SB) to use the pulse outputs.
The different CPU models provide a diversity of features and capabilities that help you create
effective solutions for your varied applications. For detailed information about a specific
CPU, see the technical specifications (Page 281).

Introducing the powerful and flexible S7-1200
1.1 Introducing the S7-1200 PLC
Easy Book
Manual, 03/2014, A5E02486774-AF 17
Table 1- 2 Blocks, timers, and counters supported by S7-1200
Element
Description
Blocks
Type
OB, FB, FC, DB
Size 30 Kbytes (CPU 1211C)
50 Kbytes (CPU 1212C)
64 Kbytes (CPU 1214C, CPU 1215C, and CPU 1217C)
Quantity
Up to 1024 blocks total (OBs + FBs + FCs + DBs)
Nesting depth 16 from the program cycle or startup OB;
6 from any interrupt event OB
Monitoring
Status of 2 code blocks can be monitored simultaneously
OBs
Program cycle
Multiple
Startup
Multiple
Time-delay interrupts
4 (1 per event)
Cyclic interrupts
4 (1 per event)
Hardware interrupts
50 (1 per event)
Time error interrupts
1
Diagnostic error interrupts
1
Pull or plug of modules
1
Rack or station failure
1
Time of day
Multiple
Status
1
Update
1
Profile
1
Timers
Type
IEC
Quantity
Limited only by memory size
Storage
Structure in DB, 16 bytes per timer
Counters
Type
IEC
Quantity
Limited only by memory size
Storage Structure in DB, size dependent upon count type
•SInt, USInt: 3 bytes
•Int, UInt: 6 bytes
•DInt, UDInt: 12 bytes

Introducing the powerful and flexible S7-1200
1.2 Expansion capability of the CPU
Easy Book
18 Manual, 03/2014, A5E02486774-AF
1.2
Expansion capability of the CPU
The S7-1200 family provides a variety of modules and plug-in boards for expanding the
capabilities of the CPU with additional I/O or other communication protocols. For detailed
information about a specific module, see the technical specifications (Page 281).
①
Communication module (CM or communication processor (CP)
②
CPU
③
Signal board (SB), communication board (CB), or Battery Board (BB)
④
Signal module (SM)
Table 1- 3 Digital signal modules and signal boards
Type
Input only
Output only
Combination In/Out
③
digital SB •4 x 24 VDC In,
200 kHz
•4 x 5 VDC In,
200 kHz
•4 x 24 VDC Out, 200 kH
z
•4 x 5 VDC Out,
200 kHz
•2 x 24 VDC In/2 x 24 VDC Out
•2 x 24 VDC In/2 x 24 VDC Out,
200 kHz
•2 x 5 VDC In/2 x 5 VDC Out,
200 kHz
④digital SM •8 x 24 VDC In •8 x 24 VDC Out
•8 x Relay Out
•8 x Relay Out
(Changeover)
•8 x 24 VDC In/8 x 24 VDC Out
•8 x 24 VDC In/8 x Relay Out
•8 x 120/230 VAC In/8 x Relay Out
•16 x 24 VDC In •16 x 24 VDC Out
•16 x Relay Out
•16 x 24 VDC In/16 x 24 VDC Out
•16 x 24 VDC In/16 x Relay Out

Introducing the powerful and flexible S7-1200
1.2 Expansion capability of the CPU
Easy Book
Manual, 03/2014, A5E02486774-AF 19
Table 1- 4 Analog signal modules and signal boards
Type
Input only
Output only
Combination In/Out
③analog SB •1 x 12 bit Analog In
•1 x 16 bit RTD
•1 x 16 bit Thermocouple
•1 x Analog Out -
④analog SM •4 x Analog In
•4 x Analog In x 16 bit
•8 x Analog In
•Thermocouple:
–4 x 16 bit TC
–8 x 16 bit TC
•RTD:
–4 x 16 bit RTD
–8 x 16 bit RTD
•2 x Analog Out
•4 x Analog Out
•4 x Analog In/2 x Analog Out
Table 1- 5 Communication interfaces
Module
Type
Description
①Communication module (CM)
RS232
Full-duplex
RS422/485 Full-duplex (RS422)
Half-duplex (RS485)
PROFIBUS Master
DPV1
PROFIBUS Slave
DPV1
AS-i Master (CM 1243-2)
AS-Interface
①
Communication processor (CP) Modem connectivity GPRS
③
Communication board (CB) RS485 Half-duplex
TeleService1
TS Adapter IE Basic
Connection to CPU
TS Adapter GSM
GSM/GPRS
TS Adapter Modem
Modem
TS Adapter ISDN
ISDN
TS Adapter RS232 RS232
1
The TS Adapter IE Basic allows you to connect various communication interfaces to the PROFINET port of the CPU
using an Ethernet cable. You can install up to 3 TS adapter modules onto the TS Adapter IE Basic.

Introducing the powerful and flexible S7-1200
1.2 Expansion capability of the CPU
Easy Book
20 Manual, 03/2014, A5E02486774-AF
Table 1- 6 Technology modules
Module
Type
Description
④
IO Link SM 1278 4xIO-Link Master Supports 4 IO link slaves
Table 1- 7 Other boards
Module
Description
③Battery board Plugs into expansion board interface on front of CPU. Provides long term
backup of realtime clock