Siemens SIMATIC S7-1200 User manual

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SIMATIC
S7-1200
Easy Book
Manual
11/2011
A5E02486774-04
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
Technical specifications
A

Legal information
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
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the relevant information is not taken into account.
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.
Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
Order number: 6ES7298-8FA30-8BQ0
Ⓟ 11/2011
Copyright © Siemens AG 2011.
Technical data subject to change

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Manual, 11/2011, A5E02486774-04 3
Preface
Welcome to the world of S7-1200, the latest in a line of the Siemens SIMATIC controllers.
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 STEP 7 programming tool 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 SIMATIC STEP 7 engineering software. The ability to program both
devices using the same engineering software significantly reduces development costs.
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, 2 pulse generators for
pulse-width applications (Page 109), 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 16).
The SIMATIC HMI Basic panels 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 233).

Preface
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This manual describes the following products:
● STEP 7 V11 Basic and Professional
● S7-1200 CPU firmware release V2.2
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) and printed
manuals. The electronic manuals can be downloaded from the customer support web site
and can also be found on the companion disk that ships with every S7-1200 CPU.
● The online information system of STEP 7 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 information
system of STEP 7. 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, we offer our technical expertise on the Internet on the
customer support web site (http://www.siemens.com/automation/support-request).
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
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Table of contents
Preface ...................................................................................................................................................... 3
1 Introducing the powerful and flexible S7-1200 ......................................................................................... 13
1.1 Introducing the S7-1200 PLC.......................................................................................................13
1.2 Expansion capability of the CPU..................................................................................................16
1.3 S7-1200 modules.........................................................................................................................18
1.4 Basic HMI panels .........................................................................................................................19
1.5 Mounting dimensions and clearance requirements .....................................................................20
1.6 New features for S7-1200 and STEP 7 V11................................................................................23
2 STEP 7 makes the work easy.................................................................................................................. 27
2.1 Easy to insert instructions into your user program.......................................................................28
2.2 Easy access to your favorite instructions from a toolbar .............................................................28
2.3 Easy to add inputs or outputs to LAD and FBD instructions........................................................29
2.4 Expandable instructions...............................................................................................................29
2.5 Easy to change the operating mode of the CPU .........................................................................30
2.6 Easy to modify the appearance and configuration of STEP 7.....................................................31
2.7 Project and global libraries for easy access ................................................................................31
2.8 Easy to select a version of an instruction ....................................................................................32
2.9 Easy to drag and drop between editors.......................................................................................32
2.10 Capturing and restoring a block state ..........................................................................................33
2.11 Changing the call type for a DB ...................................................................................................34
2.12 Temporarily disconnecting devices from a network.....................................................................35
2.13 Easy to virtually "unplug" modules without losing the configuration............................................36
3 Getting started ......................................................................................................................................... 37
3.1 Create a project............................................................................................................................37
3.2 Create tags for the I/O of the CPU...............................................................................................38
3.3 Create a simple network in your user program............................................................................39
3.4 Use the PLC tags in the tag table for addressing the instructions...............................................41
3.5 Add a "box" instruction.................................................................................................................42
3.6 Use the CALCULATE instruction for a complex mathematical equation.....................................43
3.7 Add an HMI device to the project.................................................................................................45
3.8 Create a network connection between the CPU and HMI device................................................46

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3.9 Create an HMI connection to share tags .................................................................................... 46
3.10 Create an HMI screen................................................................................................................. 47
3.11 Select a PLC tag for the HMI element ........................................................................................ 48
4 PLC concepts made easy........................................................................................................................ 49
4.1 Tasks performed every scan cycle ............................................................................................. 49
4.2 Operating modes of the CPU...................................................................................................... 50
4.3 Execution of the user program.................................................................................................... 51
4.3.1 Processing the scan cycle in RUN mode....................................................................................52
4.3.2 OBs help you structure your user program.................................................................................52
4.3.3 Event execution priorities and queuing ....................................................................................... 54
4.4 Memory areas, addressing and data types................................................................................. 59
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 .............................................................................................................................. 68
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 Adding modules to the configuration........................................................................................... 74
5.4 Configuring the operation of the CPU and modules ................................................................... 76
5.4.1 System memory and clock memory provide standard functionality............................................ 78
5.5 Configuring the IP address of the CPU....................................................................................... 80
5.6 Protecting access to the CPU or code block is easy .................................................................. 82
5.6.1 Know-how protection................................................................................................................... 83
5.6.2 Copy protection ........................................................................................................................... 84
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 ................................................................... 91
6.1.4 Creating a new code block.......................................................................................................... 92
6.1.5 Calling a code block from another code block ............................................................................ 93
6.2 Easy-to-use programming languages......................................................................................... 93
6.2.1 Ladder logic (LAD) ...................................................................................................................... 93
6.2.2 Function Block Diagram (FBD) ................................................................................................... 94
6.2.3 SCL overview .............................................................................................................................. 95
6.2.4 SCL program editor..................................................................................................................... 95
6.3 Powerful instructions make programming easy .......................................................................... 97
6.3.1 Providing the basic instructions you expect................................................................................ 97
6.3.2 Compare and Move instructions ................................................................................................. 99
6.3.3 Conversion instructions............................................................................................................. 100
6.3.4 Math made easy with the Calculate instruction......................................................................... 102

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6.3.5 Timers ........................................................................................................................................103
6.3.6 Counters.....................................................................................................................................107
6.3.7 Pulse-width modulation (PWM)..................................................................................................109
6.4 Easy to create data logs ............................................................................................................110
6.5 Easy to monitor and test your user program..............................................................................112
6.5.1 Watch tables and force tables....................................................................................................112
6.5.2 Cross reference to show usage .................................................................................................113
6.5.3 Call structure to examine the calling hierarchy..........................................................................113
6.5.4 Diagnostic instructions to monitor the hardware........................................................................114
6.5.4.1 Reading the states of the LEDs on the CPU .............................................................................114
6.5.4.2 Instructions for reading the diagnostic status of the devices .....................................................115
6.6 High-speed counter (HSC).........................................................................................................115
6.6.1 Operation of the HSC.................................................................................................................117
6.6.2 Configuration of the HSC...........................................................................................................120
7 Easy to communicate between devices................................................................................................. 123
7.1 Creating a network connection ..................................................................................................124
7.2 Communication options .............................................................................................................125
7.3 Number of asynchronous communication connections .............................................................126
7.4 PROFINET and PROFIBUS instructions ...................................................................................126
7.5 PROFINET.................................................................................................................................127
7.5.1 Ad hoc mode..............................................................................................................................128
7.5.2 Connection IDs for the PROFINET instructions.........................................................................129
7.5.3 Configuring the Local/Partner connection path..........................................................................132
7.5.4 Parameters for the PROFINET connection ...............................................................................135
7.6 PROFIBUS.................................................................................................................................137
7.6.1 Distributed I/O Instructions.........................................................................................................138
7.6.2 Configuration examples for PROFIBUS ....................................................................................138
7.6.3 Adding the CM 1243-5 (DP master) module and a DP slave....................................................142
7.6.4 Assigning PROFIBUS addresses to the CM 1243-5 module and DP slave..............................143
7.7 AS-i ............................................................................................................................................145
7.7.1 Adding the CM 1243-2 AS-i Master module and AS-i slave......................................................145
7.7.2 Assigning AS-i addresses to the CM 1243-2 AS-i Master module and AS-i slave....................146
7.8 S7 communication .....................................................................................................................147
7.8.1 GET and PUT instructions .........................................................................................................147
7.8.2 Creating an S7 connection.........................................................................................................148
7.8.3 GET/PUT connection parameter assignment............................................................................149
7.9 GPRS.........................................................................................................................................150
7.9.1 Connection to a GSM network...................................................................................................150
7.10 PtP, USS, and Modbus communication protocols.....................................................................157
7.10.1 Using the RS232 and RS485 communication interfaces...........................................................157
7.10.2 PtP instructions ..........................................................................................................................158
7.10.3 USS instructions ........................................................................................................................159
7.10.4 Modbus instructions ...................................................................................................................160

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8 PID is easy ............................................................................................................................................ 163
8.1 Inserting the PID instruction and technological object.............................................................. 165
8.2 PID_Compact instruction........................................................................................................... 167
8.3 PID_3STEP instruction.............................................................................................................. 170
8.4 Configuring the PID controller................................................................................................... 178
8.5 Commissioning the PID controller............................................................................................. 180
9 Web server for easy Internet connectivity.............................................................................................. 181
9.1 Easy to use the standard web pages........................................................................................ 181
9.2 Constraints that can affect the use of the Web server.............................................................. 182
9.2.1 Constraints when JavaScript is disabled ..................................................................................183
9.2.2 Features restricted when cookies are not allowed.................................................................... 183
9.3 Easy to create user-defined web pages.................................................................................... 184
9.3.1 Easy to create custom "user-defined" web pages .................................................................... 184
9.3.2 Constraints specific to user-defined Web pages ...................................................................... 185
9.3.3 Configuration of a user-defined Web page ............................................................................... 186
9.3.4 Using the WWW instruction ...................................................................................................... 187
10 Motion control is easy ............................................................................................................................ 189
10.1 Configuration of the axis ........................................................................................................... 192
10.2 MC_Power instruction ............................................................................................................... 194
10.3 MC_Reset instruction ................................................................................................................ 197
10.4 MC_Home instruction................................................................................................................ 198
10.5 MC_Halt instruction ................................................................................................................... 202
10.6 MC_MoveAbsolute instruction .................................................................................................. 204
10.7 MC_MoveRelative instruction.................................................................................................... 206
10.8 MC_MoveVelocity instruction.................................................................................................... 208
10.9 MC_MoveJog instruction........................................................................................................... 210
10.10 MC_CommandTable instruction................................................................................................ 212
10.11 MC_ChangeDynamic ................................................................................................................ 215
11 Easy to use the online tools................................................................................................................... 217
11.1 Going online and connecting to a CPU..................................................................................... 217
11.2 Interacting with the online CPU................................................................................................. 218
11.3 Going online to monitor the values in the CPU......................................................................... 219
11.4 Displaying status of the user program is easy .......................................................................... 220
11.5 Using a watch table for monitoring the CPU............................................................................. 220
11.6 Using the force table ................................................................................................................. 221
11.7 Capturing the online values of a DB to reset the start values................................................... 224
11.8 Copying elements of the project ............................................................................................... 225

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11.9 Comparing offline and online CPUs...........................................................................................226
11.10 Displaying the diagnostic events................................................................................................227
11.11 Setting the IP address and time of day......................................................................................227
11.12 Resetting to factory settings.......................................................................................................228
11.13 Downloading an IP address to an online CPU...........................................................................229
11.14 Using the "unspecified CPU" to upload the hardware configuration..........................................230
11.15 Downloading in RUN mode........................................................................................................231
11.15.1 Changing your program in RUN mode ......................................................................................232
A Technical specifications......................................................................................................................... 233
A.1 General Technical Specifications ..............................................................................................233
A.2 CPU modules.............................................................................................................................239
A.3 Digital I/O modules.....................................................................................................................242
A.3.1 SB 1221, SB 1222, and SB 1223 digital input/output (DI, DQ, and DI/DQ) ..............................242
A.3.2 SM 1221 digital input (DI) ..........................................................................................................245
A.3.3 SM 1222 digital output (DQ) ......................................................................................................246
A.3.4 SM 1223 VDC digital input/output (DI / DQ) ..............................................................................247
A.3.5 SM 1223 120/230 VAC input / Relay output..............................................................................248
A.4 Specifications for the digital inputs and outputs.........................................................................249
A.4.1 24 VDC digital inputs (DI) ..........................................................................................................249
A.4.2 120/230 VAC digital AC inputs...................................................................................................251
A.4.3 Digital outputs (DQ) ...................................................................................................................252
A.5 Analog I/O modules ...................................................................................................................254
A.5.1 SB 1231 and SB 1232 analog input (AI) and output (AQ).........................................................254
A.5.2 SM 1231 analog input (AI) .........................................................................................................255
A.5.3 SM 1232 analog output (AQ) .....................................................................................................255
A.5.4 SM 1234 analog input/output (AI/AQ)........................................................................................255
A.5.5 Wiring diagrams for SM 1231 (AI), SM 1232 (AQ), and SM 1234 (AI/AQ)................................256
A.6 Specifications for the analog I/O................................................................................................257
A.6.1 Specifications for the analog inputs (CPU, SM, and SB)...........................................................257
A.6.2 Input (AI) measurement ranges for voltage and current............................................................258
A.6.3 Step response for the analog inputs (AI) ...................................................................................259
A.6.4 Sample time and update times for the analog inputs ................................................................259
A.6.5 Specifications for the analog outputs (SB and SM) ...................................................................260
A.6.6 Output (AQ) measurement ranges for voltage and current .......................................................261
A.7 RTD and Thermocouple modules..............................................................................................262
A.7.1 SB 1231 RTD and SB 1231 TC specifications ..........................................................................262
A.7.2 SM 1231 RTD specifications......................................................................................................264
A.7.3 SM 1231 TC specifications ........................................................................................................265
A.7.4 Analog input specifications for RTD and TC (SM and SB)........................................................266
A.7.5 Thermocouple type ....................................................................................................................267
A.7.6 Thermocouple filter selection and update times ........................................................................268
A.7.7 RTD sensor type selection table................................................................................................268
A.7.8 RTD filter selection and update times........................................................................................270
A.8 Communication interfaces .........................................................................................................270
A.8.1 PROFIBUS master/slave ...........................................................................................................270

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A.8.1.1 CM 1242-5 PROFIBUS slave.................................................................................................... 271
A.8.1.2 CM 1243-5 PROFIBUS master................................................................................................. 272
A.8.2 GPRS CP .................................................................................................................................. 274
A.8.2.1 Technical specifications of the CP 1242-7................................................................................ 274
A.8.3 Teleservice (TS)........................................................................................................................ 277
A.8.4 RS485, RS232, and RS422 communication............................................................................. 277
A.8.4.1 CB 1241 RS485 Specifications................................................................................................. 277
A.8.4.2 CM 1241 RS485 and RS232..................................................................................................... 279
A.8.4.3 CM 1241 RS422/485 Specifications ......................................................................................... 280
A.9 Companion products................................................................................................................. 282
A.9.1 PM 1207 power module ............................................................................................................ 282
A.9.2 CSM 1277 compact switch module...........................................................................................282
Index...................................................................................................................................................... 283

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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 83) to hide the code within a specific block.
● You can use copy protection (Page 84) 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
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Table 1- 1 Comparing the CPU models
Feature CPU 1211C CPU 1212C CPU 1214C
Physical size (mm) 90 x 100 x 75 90 x 100 x 75 110 x 100 x 75
Work 25 Kbytes 25 Kbytes 50 Kbytes
Load 1 Mbyte 1 Mbyte 2 Mbytes
User memory
Retentive 2 Kbytes 2 Kbytes 2 Kbytes
Digital 6 inputs/4 outputs 8 inputs/6 outputs 14 inputs/10 outputs Local on-board I/O
Analog 2 inputs 2 inputs 2 inputs
Inputs (I) 1024 bytes 1024 bytes 1024 bytes Process image
size Outputs (Q) 1024 bytes 1024 bytes 1024 bytes
Bit memory (M) 4096 bytes 4096 bytes 8192 bytes
Signal module (SM) expansion None 2 8
Signal board (SB) or communication
board (CB)
1 1 1
Communication module (CM)
(left-side expansion)
3 3 3
Total 3 4 6
Single phase 3 at 100 kHz 3 at 100 kHz
1 at 30 kHz
3 at 100 kHz
3 at 30 kHz
High-speed
counters
Quadrature phase 3 at 80 kHz 3 at 80 kHz
1 at 20 kHz
3 at 80 kHz
3 at 20 kHz
Pulse outputs1 2 2 2
Memory card SIMATIC Memory card (optional)
Real time clock retention time 10 days, typical / 6 day minimum at 40 degrees C
PROFINET 1 Ethernet communications port
Real math execution speed 18 μs/instruction
Boolean execution speed 0.1 μs/instruction
1 For CPU models with relay outputs, you must install a digital signal board (SB) to use the pulse outputs.
Each CPU provides dedicated HMI connections to support up to 3 HMI devices. The total
number of HMI is affected by the types of HMI panels in your configuration. For example,
you could have up to three SIMATIC Basic panels connected to your CPU, or you could
have up to two SIMATIC Comfort panels with one additional Basic panel.
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 233).

Introducing the powerful and flexible S7-1200
1.1 Introducing the S7-1200 PLC
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Table 1- 2 Blocks, timers and counters supported by S7-1200
Element Description
Type OB, FB, FC, DB
Size 25 Kbytes (CPU 1211C and CPU 1212C)
50 Kbytes (CPU 1214C)
Quantity Up to 1024 blocks total (OBs + FBs + FCs + DBs)
Address range for FBs, FCs,
and DBs
1 to 65535 (such as FB 1 to FB 65535)
Nesting depth 16 from the program cycle or start up OB; 4 from the time delay
interrupt, time-of-day interrupt, cyclic interrupt, hardware interrupt,
time error interrupt, or diagnostic error interrupt OB
Blocks
Monitoring Status of 2 code blocks can be monitored simultaneously
Program cycle Multiple: OB 1, OB 200 to OB 65535
Startup Multiple: OB 100, OB 200 to OB 65535
Time-delay interrupts and
cyclic interrupts
41 (1 per event): OB 200 to OB 65535
Hardware interrupts (edges
and HSC)
50 (1 per event): OB 200 to OB 65535
Time error interrupts 1: OB 80
OBs
Diagnostic error interrupts 1: OB 82
Type IEC
Quantity Limited only by memory size
Timers
Storage Structure in DB, 16 bytes per timer
Type IEC
Quantity Limited only by memory size
Counters
Storage Structure in DB, size dependent upon count type
SInt, USInt: 3 bytes
Int, UInt: 6 bytes
DInt, UDInt: 12 bytes
1 Time-delay and cyclic interrupts use the same resources in the CPU. You can have only a total of 4 of these interrupts
(time-delay plus cyclic interrupts). You cannot have 4 time-delay interrupts and 4 cyclic interrupts.

Introducing the powerful and flexible S7-1200
1.2 Expansion capability of the CPU
Easy Book
16 Manual, 11/2011, A5E02486774-04
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 233).
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ཱི
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① Communication module (CM), communcation processor (CP), or TS Adapter
② CPU
③ Signal board (SB) or communication board (CB)
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 24VDC In,
200 kHz
4 x 5VDC In,
200 kHz
4 x 24VDC Out,
200 kHz
4 x 5VDC Out,
200 kHz
2 x 24VDC In / 2 x 24VDC Out
2 x 24VDC In / 2 x 24VDC Out,
200 kHz
2 x 5VDC In / 2 x 5VDC Out,
200 kHz
8 x 24VDC In 8 x 24VDC Out
8 x Relay Out
8 x Relay Out
(Changeover)
8 x 24VDC In / 8 x 24VDC Out
8 x 24VDC In / 8 x Relay Out
8 x 120/230VAC In / 8 x Relay Out
④ digital SM
16 x 24VDC In 16 x 24VDC Out
16 x Relay Out
16 x 24VDC In / 16 x 24VDC Out
16 x 24VDC In / 16 x Relay Out

Introducing the powerful and flexible S7-1200
1.2 Expansion capability of the CPU
Easy Book
Manual, 11/2011, A5E02486774-04 17
Table 1- 4 Analog signal modules and signal boards
Type Input only Output only Combination In/Out
③ analog SB 1 x 12 bit Analog In
1 x 16 bit RTD
1 x 16 bit Thermocouple
1 x Analog Out -
④ analog SM 4 x Analog In
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
RS232 Full-duplex
RS485 Half-duplex
RS422/485 Full-duplex (RS422)
Half-duplex (RS485)
PROFIBUS Master DPV1
PROFIBUS Slave DPV1
① Communication module (CM)
AS-i Master (CM 1243-2) AS-Interface
① Communication processor (CP) Modem connectivity GPRS
① Communication board (CB) RS485 Half-duplex
TS Adapter IE Basic1 Connection to CPU
TS Adapter GSM GSM/GPRS
TS Adapter Modem Modem
TS Adapter ISDN ISDN
① TeleService
TS Adapter RS232 RS232
1 The TS Adapter allows you to connect various communication interfaces to the PROFINET port of the CPU. You install
the TS Adapter on the left side of the CPU and connect the TS Adapter modular (up to 3) onto the TS Adapter.

Introducing the powerful and flexible S7-1200
1.3 S7-1200 modules
Easy Book
18 Manual, 11/2011, A5E02486774-04
1.3 S7-1200 modules
Table 1- 6 S7-1200 expansion modules
Type of module Description
① Status LEDs on
the SB
The CPU supports one plug-in
expansion board:
A signal board (SB) provides
additional I/O for your CPU.
The SB connects on the front of
the CPU.
A communication board (CB)
allows you to add another
communication port to your
CPU.
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② Removable user
wiring connector
① Status LEDs
② Bus connector
Signal modules (SMs) add
additional functionality to the CPU.
SMs connect to the right side of the
CPU.
Digital I/O
Analog I/O
RTD and thermocouple
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③ Removable user
wiring connector
① Status LEDs
Communication modules (CMs)
and communications processors
(CPs) add communication options
to the CPU, such as for
PROFIBUS or RS232 / RS485
connectivity (for PtP, Modbus or
USS), or the AS-i master. A CP
provides capabilities for other types
of communication, such as to
connect the CPU over a GPRS
network.
The CPU supports up to 3 CMs
or CPs
Each CM or CP connects to the
left side of the CPU (or to the
left side of another CM or CP)
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② Communication
connector

Introducing the powerful and flexible S7-1200
1.4 Basic HMI panels
Easy Book
Manual, 11/2011, A5E02486774-04 19
1.4 Basic HMI panels
Because visualization is becoming a standard component for most machine designs, the
SIMATIC HMI Basic Panels provide touch-screen devices for basic operator control and
monitoring tasks. All panels have a protection rating for IP65 and have CE, UL, cULus, and
NEMA 4x certification.
Basic HMI Panel Description Technical data
KP 300 Basic PN
3.6" membrane keyboard with 10 freely
configurable tactile keys
Mono (STN, black/white)
87 mm x 31 mm (3.6")
Backlight color programmed (white,
green, yellow or red)
Resolution: 240 x 80
250 tags
50 process screens
200 alarms
25 curves
40 KB recipe memory
5 recipes, 20 data records, 20 entries
KTP 400 Basic PN
4" touch screen with 4 tactile keys
Mono (STN, gray scale)
76.79 mm x 57.59 mm (3.8")
Portrait or landscape
Resolution: 320 x 240
250 tags
50 process screens
200 alarms
25 curves
40 KB recipe memory
5 recipes, 20 data records, 20 entries
KTP 600 Basic PN
6" touch screen with 6 tactile keys
Color (TFT, 256 colors) or Mono
(STN, gray scales)
115.2 mm x 86.4 mm (5.7")
Portrait or landscape
Resolution: 320 x 240
500 tags
50 process screens
200 alarms
25 curves
40 KB recipe memory
5 recipes, 20 data records, 20 entries

Introducing the powerful and flexible S7-1200
1.5 Mounting dimensions and clearance requirements
Easy Book
20 Manual, 11/2011, A5E02486774-04
Basic HMI Panel Description Technical data
KTP 1000 Basic PN
10" touch screen with 8 tactile keys
Color (TFT, 256 colors)
211.2 mm x 158.4 mm (10.4")
Resolution: 640 x 480
500 tags
50 process screens
200 alarms
25 curves
40 KB recipe memory
5 recipes, 20 data records, 20 entries
TP 1500 Basic PN
15" touch screen
Color (TFT, 256 colors)
304.1 mm x 228.1 mm (15.1")
Resolution: 1024 x 768
500 tags
50 process screens
200 alarms
25 curves
40 KB recipe memory (integrated
flash)
5 recipes, 20 data records, 20 entries
1.5 Mounting dimensions and clearance requirements
The S7-1200 PLC is designed to be easy to install. Whether mounted on a panel or on a
standard DIN rail, the compact size makes efficient use of space.
Each CPU, SM, CM, and CP supports mounting on either a DIN rail or on a panel. Use the
DIN rail clips on the module to secure the device on the rail. These clips also snap into an
extended position to provide screw mounting positions to mount the unit directly on a panel.
The interior dimension of the hole for the DIN clips on the device is 4.3 mm.