S7-1200 Programming Cable

[Kylee Evancho]

TheS7-1200 expansion cable you are pointing to is designed to connect a CPU to a SM (DI, DO, AI, AO module) at a distance of 2 m, but not to a CM See te S7-1200 Programmable Controller manual for details on the insstallation of this cable:

The extension cable is only for modules that can be installed to the right of the PLC. Modules which require being placed to the left of the plc, like COMM modules (rs232/rs422/rs485/profibus for example), they must be placed directly to the left of the plc. I have not heard of any extension cable for the left side of the plc. If it exists, it will be in the s7-1200 system manual, as are the instructions for using the s7-1200 extension cable.

In the S7-300 and s7-400 families, connections on the backplane connectors between the CPUs and the modules on the rack were distinguished between 2 different connections: P-bus and K-bus, and the distinction was extended to the expanded rack IMs: for example, with a IM 365, there was no support on rack 1 (rack 0 being the one where the CPU was located) for the K-bus, so no communication module or function module could be located on it. Only the P-bus was connected to rack 1, so it could only handle SMs .

I can wish all I want for the old style USB cable to flip over and plug in, but even though it looks like it might, it simply refuses to insert and function. If you do manage to force the plug to go in, the odds of anything other than a ruined usb port and damaged cable are 0.

I completely understand that. I work with someone that used to consistently undersized enclosures, used shallow wire ducting, and ended up having to mount stuff in very strange configurations, like din-rail with terminals and active components on the sides and sometimes enclosure door just to fit everything.

Now, he finally understands why 30% extra space is not really extra (at least in our line of work where change is a constant rather than sporadic thing). I personally worked on a project I felt like I had right-sized it. After many engineering changes and new sensors and 6 more enclosure penetrations (the enclosure had been customized with pre-done holes.....), everything fits, with room for maybe a couple small terminals, and that's about it. One new sensor's amplifier module was as large as the s7-1211 PLC.

Siemens S7 1200 PLC with everything you need to start programming. NO SOFTWARE, the software is not included with this trainer and start creating your own programs. We sell the software TIA Portal or you can buy the trainer that incuses the software if needed.

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The Siemens SIMATIC S7-1200 is a programmable logic controller (PLC) that is commonly used in industrial automation applications. It is a powerful device that is designed to control and monitor processes in real-time. In this article, we will discuss how to work with the Siemens SIMATIC S7-1200 and the basic concepts of programming a PLC.

Before we delve into the programming aspect of the SIMATIC S7-1200, let's take a quick look at its hardware components. The SIMATIC S7-1200 comes with a central processing unit (CPU), digital and analog inputs and outputs, communication modules, and power supply. The CPU is the heart of the system and is responsible for executing the program instructions. The digital and analog inputs and outputs allow the PLC to interface with the outside world, while the communication modules enable the PLC to communicate with other devices in the network.

Programming a SIMATIC S7-1200 is accomplished using the STEP 7 Basic software. This software is used to create, edit, and download programs to the PLC. The programming language used for the SIMATIC S7-1200 is Ladder Logic, which is a graphical programming language that resembles an electrical schematic.

Ladder Logic programming is based on a series of ladder rungs, where each rung represents a logic function. The ladder rungs are executed from top to bottom, and the outputs of each rung are connected to the inputs of the next rung. This allows for complex logic functions to be created using simple building blocks.

To create a basic program, start by opening the STEP 7 Basic software and creating a new project. Once the project is created, add a new program to the project. Next, add the inputs and outputs that will be used in the program. This is done by selecting the "Hardware" tab and then selecting the appropriate modules.

Once the inputs and outputs are configured, it is time to create the logic for the program. This is done by adding ladder rungs to the program. The ladder rungs are created by selecting the "Ladder" tab and then selecting the appropriate instruction from the toolbar. The instructions can be dragged and dropped onto the ladder rung and then configured with the appropriate parameters.

Once the program is created, it is time to download it to the PLC and test it. To download the program, connect the PC to the PLC using a programming cable and then select the "Download" option in the software. This will transfer the program to the PLC.

To test the program, use the "Online" mode in the software to monitor the inputs and outputs of the PLC. This will allow you to see the state of the inputs and outputs in real-time. If the program is not working as expected, use the "Debug" mode to step through the program and identify any issues.

Working with the Siemens SIMATIC S7-1200 is an essential skill for anyone involved in industrial automation. The ability to program a PLC using Ladder Logic and troubleshoot issues is critical to ensure that processes are running efficiently and safely. By following the basic steps outlined in this article, you should be able to create and test a basic program using the SIMATIC S7-1200.

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