Generating Operator Training Directly from PLC Code
A packaging plant needed to onboard a new operator in two weeks but had no up-to-date training documentation. By uploading the machine's ACD file and MER project, they generated a complete 120-page training manual covering safety interlocks, operating procedures, alarm response, and HMI screen guides -- and discovered 4 critical signals invisible to the operator.
New Operator, No Documentation
A packaging plant hired a new operator for their Case Packer line. The machine had been running for eight years, maintained by a senior technician who knew every rung of the PLC program by memory. He was retiring in three weeks.
The last written training manual was from the original machine build -- outdated, missing years of modifications, and missing the HMI screens that were added during a controls upgrade two years ago. Writing a new manual from scratch would take weeks of the senior technician's time, time they did not have.
The maintenance supervisor uploaded the machine's ACD file and MER project to PLC Company. Within minutes, they had a complete, machine-specific training manual built directly from the current PLC program and HMI project -- no guesswork, no outdated documentation, every tag name and interlock reflecting the actual running code.
“Our last training manual was from 2016. The machine has had dozens of changes since then. We needed something that matched the code actually running on the PLC today, not what it looked like eight years ago.”
-- Maintenance Supervisor, Case Packer Line
12 Training Modules from One File Upload
The system analyzed the PLC program structure, tag naming conventions, and instruction patterns to generate a complete operator training manual organized into 12 modules.
Analysis Summary
Training Manual Generated
Every module references the actual tag names, instruction parameters, and device configurations from the running PLC program. The safety interlock module identified 47 interlock conditions across 14 safety rungs, including E-stop circuits, guard door interlocks, and light curtain monitoring.
Training Modules
Complete Module Breakdown
Every Detail Pulled from Code
The Alarm Response module lists every fault code found in the PLC program, maps each to its trigger condition (which sensor, which interlock), and generates a response procedure based on the rung logic. The Preventive Maintenance module extracts timer presets and counter accumulator values to identify service intervals -- such as “lubrication pump runs every 4 hours (T4:7 preset = 14400s)” and “blade replacement after 50,000 cycles (C5:2 preset = 50000).”
HMI Analysis
HMI Blind Spot Detection
By cross-referencing the PLC I/O tags against the MER project's screen definitions, the system identified 4 PLC signals with no HMI visibility. These are inputs and outputs the PLC monitors or controls, but the operator cannot see from any HMI screen.
Signals the Operator Cannot See
The SafetyRelayStatus blind spot was particularly concerning: the PLC monitors the safety relay feedback to confirm the E-stop circuit is intact, but this status was never added to any HMI screen. If the safety relay failed to energize after an E-stop reset, the operator would have no indication from the panel -- they would need to physically check the relay in the electrical cabinet.
The maintenance team added indicators for all four blind spots to the main HMI overview screen before the new operator's first day.
What the Training Generation Revealed
120-Page Manual in Minutes
A complete, structured training document generated from a single file upload. No weeks of writing, no interviewing the retiring technician about every rung.
Machine-Specific, Not Generic
Every example, tag name, interlock condition, and alarm code references the actual machine. No generic "check the safety interlock" -- it says exactly which interlock, which I/O point, which rung.
4 HMI Blind Spots Found
Cross-referencing PLC I/O against HMI screens revealed 4 signals the operator could not monitor from the control panel, including a safety relay feedback with no display.
Print-Ready Format
Table of contents, page breaks, color-coded safety sections, device tables, and structured procedures. Ready for the shop floor binder or digital distribution.
Three Steps to Training
Upload PLC File
Upload your ACD, L5X, or RSS file. Optionally include a MER file for HMI analysis. The system parses every routine, rung, tag, and I/O point from the program.
Training Generated
The system analyzes tag names, instruction patterns, safety rungs, and process logic to build 12 training modules. If a MER file is included, HMI screens are cross-referenced for blind spot detection.
Print and Train
Download the training manual as a print-ready HTML document with table of contents, page breaks, and color-coded sections. Use it for onboarding, refresher training, or audit documentation.
Try It With Your PLC File
Upload an ACD, L5X, or RSS file to generate a machine-specific training manual.
Common Questions
What file types are supported for training generation?
PLC program files in ACD (ControlLogix/CompactLogix), L5X (Logix export), and RSS (SLC 500/MicroLogix) formats are supported. For HMI analysis, MER files from FactoryTalk View ME can also be uploaded alongside the PLC file to generate screen guides and detect blind spots.
How does it generate training without seeing the physical machine?
The system analyzes the PLC program structure: tag names reveal equipment (motors, valves, conveyors), safety rungs identify interlocks and E-stop circuits, timer presets indicate process timing, counter values show batch sizes, and I/O configuration maps physical devices. Combined, these elements paint a complete picture of machine operation that forms the basis for each training module.
Can I customize the generated training manual?
The generated manual is a complete starting point covering all 12 modules. Each module is structured with headings, tables, and procedural steps that can be edited, rearranged, or supplemented with plant-specific policies. The HTML format supports direct printing with table of contents, page breaks, and color-coded sections.
What are HMI blind spots and why do they matter?
HMI blind spots are PLC I/O points that have no corresponding indicator or display on the operator's HMI screen. For example, if a safety relay status is monitored by the PLC but never shown on any HMI screen, the operator has no visibility into that signal. Blind spots mean operators cannot monitor critical signals from the control panel and may miss early warning signs of equipment issues.