Every safety PLC on your floor already records the moments that matter to EHS: an e-stop hit on Line 2, a guard opened mid-cycle, a maintenance key turned to run a light curtain out of the loop. Most of those events stay inside the controller or scroll off a SCADA alarm screen, and never reach the near-miss or incident record. Safety data integration reads those signals, keeps their original timestamps and links them to EHS records, so repeated bypasses show up as a pattern long before they show up as an injury. Trace the signal path in a short safety data demo.
Turn E-Stops, Interlock Trips and Bypasses Into EHS Evidence
iFactory Turnkey Integration reads e-stop, interlock and bypass signals from your PLCs and SCADA and feeds them to the EHS platform. The AI flags frequent bypasses as SIF precursors, so EHS can act before someone is hurt.
Six Machine Safety Signals Your Controllers Already Record
A safety PLC or safety relay knows a great deal that EHS never sees. It knows when an e-stop was pressed and which one, when a guard opened, when a light curtain was muted and when someone turned a key to run with a safeguard out of the loop. Each of those is a fact with a time attached, which is exactly what most incident reviews lack. List the signals on your own lines with our controls support team.
Read the Stop Category Before You Read the Count
IEC 60204-1 and NFPA 79 define three stop categories. Category 0 removes power from the actuators at once. Category 1 is a controlled stop that keeps power until the machine stops, then removes it. Category 2 is a controlled stop with power left on. An emergency stop may only be Category 0 or 1. Knowing the category tells you what each logged event means, and what an e-stop pressed fifteen times a shift is really saying. Review your stop functions in a stop data session.
Under ISO 13850, resetting an emergency stop device must not by itself restart the machine. Logging the gap between stop, reset and restart shows whether that rule holds on every line.
The Safety Layer Stays Untouched, Only Its Status Moves
Safety functions carry a rating. ISO 13849-1 grades them by Performance Level from PL a to PL e, and IEC 62061 by Safety Integrity Level up to SIL 3 for machinery, both resting on IEC 61508. That rating belongs to the validated safety program, so the integration only reads status and event tags. Rockwell's GuardLogix guidance notes that reading does not affect safety system behaviour, while warning that heavy read rates can load a controller. Agree the read path with our OT support team.
- E-stop, guard, curtain and key status bits
- Safety fault and diagnostic codes
- SCADA alarm events with source timestamps
- Run state and mode, for context
- All over OPC UA, EtherNet/IP or your SCADA server, set to read
- Safety tags, safety programs or their signatures
- Reset, mute or bypass commands
- Setpoints or outputs of any kind
- The stop category or rating of any function
Every Bypass Lands in the EHS Record, With Its Time
iFactory reads the safety signals your controllers already produce, links each one to the permit, LOTO or near-miss record it belongs with, and tells EHS when a pattern starts to look like SIF potential.
From a Turned Key to a Flag in the EHS Queue
Defeated safeguards are common, not rare. A 2006 HVBG study, reported by the German KAN commission, found that around 37% of protective devices on machinery were defeated, temporarily or permanently. ISO 14119 asks machine designers to minimise the motivation to defeat interlocks, and OSHA 1910.147 brings servicing under lockout rules whenever a worker must remove or bypass a guard or other safety device. Bypass key logging shows where both are slipping. Map your bypass points with our machine safety team.
OSHA's minor servicing exception covers routine, repetitive tasks integral to production only when other measures give effective protection. A bypass key with no such measure on record deserves a look.
Three Conditions That Make a Bypass a Serious Injury Risk
Not every safety event carries the same weight. The Campbell Institute at the National Safety Council describes SIF precursors as high-risk situations where controls are broken, absent or not complied with. Its framework names three conditions together: a high-risk activity, missing critical controls and a serious outcome likely if things continue. PLC data shows the first two directly. People judge the third. Talk through your SIF criteria with our EHS support team.
Patterns Worth a Second Look, and Where Each One Links
One e-stop is an event. The same e-stop pressed every night at the same station, or a bypass that always appears just before a jam alarm, is a pattern. Correlation only works when each source keeps its own timestamp, the safety PLC's time for the stop and the SCADA server's time for the alarm, synced to one plant clock. Thresholds are set with your EHS team, not by default. Walk through your alarm history in a correlation review.
Five Steps From Safety I/O List to Live EHS Flags
The order matters. Controls engineering confirms what each signal means before anyone draws conclusions from it, and EHS agrees what counts as a flag before alerts reach anyone. Each step ends with something the plant signs. Get a step plan for your lines from our support team.
One Record per Safety Signal, Signed by Controls and EHS
Fill in one record for each safety signal before data flows. It stops a raw bit from being misread and keeps controls, maintenance and EHS reading the same thing. Get a blank version in a template walkthrough.
Three Signal Patterns and What EHS Did Next
These are illustrations of how flags usually play out, not case studies. Your own procedures decide the response. Bring a recent event to our support engineers to see how it would read.
Price the Hours Spent Digging Through Stop Logs
The real value is the serious injury that never happens, and that should never be turned into a made-up figure. What you can size is the manual work of pulling stop and bypass logs today. Every input below is assumed, to show the arithmetic only. Build the case with your own figures in a value session.
Set those hours against the integration scope for your own lines. Keep injury cost estimates out of the sum unless your own claims data supports them.
Safety Tie-Ins, EHS Link and an NVIDIA Server in One Scope
A pre-configured NVIDIA AI server ships racked and ready, with iFactory, the PLC and SCADA connectors and the safety pattern models pre-loaded. Our team maps the safety I/O with your controls engineers and links it to the EHS platform. You rack it, plug in power and Ethernet, and the AI is live. Scope it for your lines with a turnkey quote.
- Pre-configured NVIDIA AI server, racked and ready
- Read-only PLC and SCADA connectors for safety status
- Safety I/O mapping with your controls engineers
- E-stop, interlock and bypass pattern models
- Links to near-miss, LOTO, permit and work order records
- SIF precursor flags routed to EHS review
- 24×7 remote monitoring of server and data flows
Safety devices listed, read path signed off, server racked, status tags flowing.
Signals linked to EHS records, flags run silently and are checked by EHS.
Flags switched on, EHS and supervisors trained, weekly pattern review started.
Controls Data and EHS Records, Finally in One Place
Safety signals usually live with controls engineering and safety records with EHS, in different tools. iFactory joins the two without touching the safety layer. Our support team can walk you through a pilot plan.
What Plant Managers Ask About Safety Data From PLCs and SCADA
Let the Safety PLC Tell EHS What It Already Knows
Read e-stops, interlocks and bypasses from your PLCs and SCADA, link them to EHS records and get SIF precursor flags before the next serious incident. Delivered turnkey, live in 6 to 12 weeks.
