SIMATIC S7 S7-1200 Programmable Controller

PrefaceSIMATIC S7 S7-1200 Programmable controllerSIMATICS7S7-1200 Programmable controllerSystem Manual1Product overview2Installation3PLC concepts4Device configuration5Programming concepts6Programming instructions7PROFINETPoint-to-Point (PtP)communications89Online and diagnostic toolsATechnical specificationsBCalculating a power budgetCOrder numbers04/2009A5E02486680-01

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PrefacePurpose of the manualThe S7-1200 series is a line of programmable logic controllers (PLCs) that can control avariety of automation applications. Compact design, low cost, and a powerful instruction setmake the S7-1200 a perfect solution for controlling a wide variety of applications. The S71200 models and the Windows-based programming tool give you the flexibility you need tosolve your automation problems.This manual provides information about installing and programming the S7-1200 PLCs andis designed for engineers, programmers, installers, and electricians who have a generalknowledge of programmable logic controllers.Required basic knowledgeTo understand this manual, it is necessary to have a general knowledge of automation andprogrammable logic controllers.Scope of the manualThis manual is valid for STEP 7 Basic V10.5 and the S7-1200 product family. For a completelist of the S7-1200 products described in this manual, refer to the technical specifications(Page 283).Certification, CE label, C-Tick, and other standardsRefer to the technical specifications (Page 283) for more information.Service and supportIn addition to our documentation, we offer our technical expertise on the Internet stContact your Siemens distributor or sales office for assistance in answering any technicalquestions, for training, or for ordering S7 products. Because your sales representatives aretechnically trained and have the most specific knowledge about your operations, processand industry, as well as about the individual Siemens products that you are using, they canprovide the fastest and most efficient answers to any problems you might encounter.S7-1200 Programmable controllerSystem Manual, 04/2009, A5E02486680-013

Preface4S7-1200 Programmable controllerSystem Manual, 04/2009, A5E02486680-01

Table of contentsPreface . 31234Product overview . 91.1Introducing the S7-1200 PLC.91.2Signal boards .111.3Signal modules .111.4Communication modules .121.51.5.11.5.2TIA Portal software .12Different views to make the work easier .13Help when you need it .141.6Display panels.17Installation . 192.12.1.12.1.22.1.32.1.42.1.5Installation and removal procedures.22Installing and removing the CPU .24Installing and removing a signal module.25Installing and removing a communication module.27Installing and removing a signal board .28Removing and reinstalling the S7-1200 terminal block connector.292.2Wiring guidelines.30PLC concepts . 353.13.1.13.1.23.1.33.1.4Execution of the user program.35Operating modes of the CPU.37Event execution priorities and queuing.40CPU memory.45Password protection for the S7-1200 CPU.483.2Data storage, memory areas and addressing.493.3Data types .543.43.4.13.4.23.4.3Saving and restoring memory .57Understanding how the S7-1200 saves and restores data.57Using the memory card as a "Program" card .58Using the memory card as a "Transfer" card.60Device configuration . 634.1Inserting a CPU.644.2Configuring the operation of the CPU.654.3Adding modules to the configuration .664.4Configuring the parameters of the modules.674.5Creating a network connection .694.6Configuring a permanent IP address .70S7-1200 Programmable controllerSystem Manual, 04/2009, A5E02486680-015

Table of contents566Programming concepts . idelines for program design. 73Structuring your user program . 74Using blocks to structure your program . 75Organization block (OB). 76Function (FC) . 78Function block (FB) . 78Data block (DB). 79Selecting the programming language . 805.2Copy protection . 825.3Debugging and testing the program. 83Programming instructions . sic instructions . 85Bit logic. 85Set and reset instructions. 87Positive and negative edge instructions. 89Timers . 91Counters. 94CTRL HSC instruction . 97Compare. 99Math . 101MOD instruction . 102Move. 108Swap instruction. 112Convert. 113Scale and normalize instructions . 115Program control. 116Logical operations . 118Shift and Rotate . 36.2.66.2.76.2.86.2.8.1Extended instructions. 124Clock and calendar instructions . 124String and character instructions . 128String conversion instructions . 128String operation instructions. 137Program control instructions . 146Reset scan cycle watchdog instruction . 146Stop scan cycle instruction. 147Get Error instructions . 147Communications instructions . 151Open Ethernet Communication. 151Point-to-Point instructions . 164Interrupt instructions. 165Attach and detach instructions. 165Start and cancel time delay interrupt instructions . 168Disable and Enable alarm interrupt instructions . 170PID control. 171Motion control instructions . 171Pulse instruction. 172CTRL PWM instruction. 1726.36.3.16.3.1.1Global library instructions. 175USS . 175Requirements for using the USS protocol. 175S7-1200 Programmable controllerSystem Manual, 04/2009, A5E02486680-01

Table of 3.2.16.3.2.26.3.2.378USS DRV instruction.177USS PORT instruction .179USS RPM instruction .180USS WPM instruction.182USS status codes .183MODBUS .184MB COMM LOAD.184MB MASTER .187MB SLAVE .198PROFINET . munication with a programming device.208Establishing the hardware communications connection.209Configuring the devices .209Assigning Internet Protocol (IP) addresses .210Assigning IP addresses to programming and network devices .

1200 models and the Windows-based programming tool give you the flexibility you need to solve your automation problems. This manual provides information about installing and programming the S7-1200 PLCs and is designed for engineers, programmers, installers, and electricians who have a general knowledge of programmable logic controllers.