What a program rescue deliverable looks like
This is a redacted example showing the structure and documentation level of a typical PLC/HMI program rescue deliverable. It is not based on any real client project, and all numbers, names and diagrams are fictional.
Document structure
- Cover and project summary — controller type, I/O count, program size, and a short description of what the machine does.
- Program file inventory — a list of every file exported from the controller, with checksums and version notes.
- I/O and tag tables — digital and analogue addresses, signal descriptions, and cross-references to the electrical drawings.
- Program structure overview — organization blocks, function blocks, data blocks, and how they relate to the machine sequences.
- Alarms, recipes, HMI screens — a summary of operator-facing logic and any safety interlocks.
- Backup verification record — checksum comparison, restore test result, and recommended backup schedule.
- Hand-over checklist — what was delivered, where the backups are stored, and who has access.
Example figures used in this sample: Siemens S7-1200, 54 digital I/O points, 12 analogue channels, 34 pages of program documentation, 6 HMI screens, 2 recipe data sets.
What is not included
This sample is for illustration only. A real deliverable will reflect the actual controller, program complexity and site conditions observed during the rescue. It will also include the written authorization from the equipment owner and any site-specific safety notes required by your plant.
Request a real assessment
For a real project we start with a free remote triage: tell us the controller model and the symptom, and we will tell you what can be read remotely and what needs an on-site visit.