Siemens PLC programming in TIA Portal — send the sequence, get the program free
Siemens controllers we write for
| S7-1200 | CPU 1211C to CPU 1217C |
|---|---|
| S7-1500 | S7-1500 and ET 200SP CPUs |
| HMI | SIMATIC Basic and Comfort panels in WinCC |
| Networks | Profinet I/O and Modbus TCP |
| Software | TIA Portal — name your version |
| Languages | LAD, FBD and SCL (Structured Text) |
| Tested in | PLCSIM, against a scripted machine |
| You receive | A TIA Portal project archive for your version, a PDF printout of every block, and the PLC tag table |
How we write a Siemens program
On top of the rules every program of ours follows: one I/O map, one owner per output, a timeout on every wait.
- The tag table is the one I/O map; blocks use symbolic names, never absolute addresses.
- The sequence is one FB with its own instance DB: a step number, a timer per step and a named alarm when it runs out.
- Settings sit in retentive DB variables, with limits checked before they are used.
- Alarms are HMI discrete alarms with cause text, so the panel says what to check, not just which bit is on.
How the free PLC program works
No meeting, no quotation, no payment. The sequence is the specification.
- STEP 01You describe the sequenceThe PLC and software version, every input and output, then the steps in order: what the machine does, what it waits for, how long that may take, and what happens if it takes longer.
- STEP 02We write it and test itAn engineer reads it, asks if anything is unclear, writes the program and runs it in the simulator against your sequence — a normal cycle, a sensor that never arrives, a stop mid-cycle.
- STEP 03You get it in 3 daysBy email: the project file for your software and version, the I/O, sequence and alarm lists, download and test notes — and the EPLAN or AutoCAD Electrical schematic if you asked for it.
What you receive
- The PLC project — a TIA Portal project archive for your version, a PDF printout of every block, and the PLC tag table.
- A PDF printout of the program, to read and check before anything is downloaded.
- The I/O list, with every address, name and device.
- The sequence chart: each step, what it switches, what it waits for and its maximum time.
- The alarm list, with the cause and what to check for each one.
- Download and test notes: how to load it, settings to check, and the order to test it in.
- The electrical schematic, if you asked for it — EPLAN Electric P8 (project backup and PDF) or AutoCAD Electrical (DWG and PDF).
It all comes by email to the address on the form, within 3 days. Anything too large to attach comes as a download link. Questions while you commission it go to free PLC support.
What the free program covers
One machine's sequence program on a CODESYS, Delta, Siemens or Omron controller, written from what you send, and the electrical schematic if you ask for it. Free, delivered in 3 days, with no obligation.
HMI screens, commissioning on site, fail-safe (safety PLC) programs, multi-axis motion and lines where several machines work together are quoted separately. If what you send needs one of those, we say so and give a fixed price before starting — never after.
The program is written and simulated from your description; a simulator does not know your wiring. It has to be commissioned on the machine by a qualified person — first with air and actuator power off, checking every input and output — and the emergency stop and guards must work in hardware, through a safety relay, not only in the program.
Siemens PLC programming questions
Which TIA Portal version do you write for?
Yours. A TIA Portal project can be upgraded into a newer version but not opened in an older one, which is why the form asks. We save in the version you name and send the archive file it opens from.
Is the program tested before it is sent?
In PLCSIM, step by step against a scripted machine: a normal cycle, a sensor that never arrives, an emergency stop in the middle. What a simulator cannot know is your wiring, which is why it is commissioned on the machine before production.
Can you write the safety program on an F-CPU?
A fail-safe program is separate, validated work, so it is not part of the free offer — ask and we will quote it. The free program reads the safety relay's status and stops the sequence; the safety function itself stays in the hardware.
Is the PLC program really free?
Yes. Send your machine's sequence through the form and the program — and the electrical schematic, if you ask for one — is free, with no obligation to buy anything else. Helping first is how we earn the bigger jobs: new machines, retrofits and upgrades.
How long does it take?
3 days from the day we have your sequence. If something in it is unclear we ask first, by email or WhatsApp, and the 3 days run from your answer.
How is the program delivered?
By email to the address on the form: the project file in your software's own format and version, a PDF printout, the I/O list, the sequence and alarm lists, and notes on downloading and testing it. Files too large to attach come as a download link.
Can I get the electrical schematic as well?
Yes — choose EPLAN Electric P8 or AutoCAD Electrical on the form. It is drawn from your I/O list: the power and control circuits, PLC I/O wiring and the terminal list, as the drawing files and a PDF.
Will the program run my machine straight away?
It is written and simulated against your sequence, but a simulator does not know your wiring. It has to be commissioned on the machine by a qualified person — first with air and actuator power off, checking every input and output — and the emergency stop and guards must work in hardware, not only in the program. Questions while you commission it go to our free PLC support.
What is not part of the free program?
HMI screens, commissioning on site, fail-safe (safety PLC) programs, multi-axis motion, and lines where several machines work together are quoted separately. If what you send needs one of those, we say so and give a fixed price before starting — never after.
What happens to my sequence and drawings?
They are used only to write your program. We do not publish them, share them or reuse them for anyone else.
Other platforms in the free program
Have a job that a machine should be doing?
Send the part and the target output. You get a concept, a sequence and a budget range back — free, and with no obligation to build it with us.