Allen-Bradley PLC-5 Reverse Engineering Consulting & Migration Roadmap

We deliver complete reverse engineering, functional specifications, and a clear migration roadmap for legacy PLC-5 systems — so your team or chosen integrator can execute efficiently.

PLC-5 Reverse Engineering Consulting

Even with minimal documentation, we provide a full, accurate picture of your PLC-5 program through our structured consulting process.

Our Step-by-Step Consulting Process

  1. Full program upload and project backup
  2. Processor type, I/O chassis, and module documentation
  3. Data file inventory and address mapping
  4. Cross-reference analysis and functional block identification
  5. Plain-English functional specification
  6. Modern descriptive tag database
  7. Phased migration roadmap and cutover guidance

Common PLC-5 Data Files & Real-World Examples

Data FileTypeTypical UseExample Addresses
N FilesIntegerSetpoints, analog valuesN7:0 (Pump Speed SP), N7:42 (Level PV)
B FilesBinaryDiscrete flags, permissivesB3:0/0 (Motor_Run), B3:10/5 (High_Level_Alarm)
T FilesTimerDelay timersT4:0 (Pump_Start_Delay)
C FilesCounterBatch countersC5:0 (Batch_Counter)
R FilesControlSequencersR6:0 (Step_Sequencer)
M0/M1 FilesModule-specificSpecialty I/OM0:3.0 (HSC data)
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