Knowledge

Analog input raw counts mapped to engineering units with a Logix SCL instruction

Setting Raw and Engineering Limits for Logix SCL

A field guide to Logix SCL scaling that derives raw limits from module configuration, engineering limits from the calibrated instrument, preserves signal quality and verifies normal and fault behavior.

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Managed-switch packet capture of EtherNet/IP traffic from an Allen-Bradley 842E encoder

Capturing EtherNet/IP Traffic from an Allen-Bra...

A nonintrusive packet-capture workflow for an Allen-Bradley 842E encoder, covering mirror-port placement, EtherNet/IP traffic classes, RPI timing, switch evidence, sequence gaps and safe interpretation.

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PLC-5 engineering workstation and documented Data Highway Plus network

Maintaining a PLC-5 Data Highway Plus Engineeri...

A field-ready plan for keeping PLC-5 Data Highway Plus access recoverable, covering adapter identity, node and baud records, physical diagnostics, workstation backups, controlled routing and migration evidence.

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Laptop service interface for SLC 500 DH-485 and DF1 communications

Connecting a Modern Laptop to SLC 500 DH-485 an...

Connect a current laptop to an SLC 500 without confusing USB, DF1, DH-485, DH+, or Ethernet. Identify the port, choose the correct interface, configure RSLinx, and prove stable access.

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Allen-Bradley 1785-ENET sidecar module beside a compatible PLC-5 processor

Adding a 1785-ENET to PLC-5 Without Breaking th...

A commissioning-focused guide to adding a 1785-ENET sidecar to a compatible PLC-5, covering chassis fit, firmware, connector protection, Channel 3A setup, diagnostics, rollback and network boundaries.

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Engineer measuring RSLogix 500 online edit performance on an SLC controller

Why RSLogix 500 Slows Down During Online Editing

A fault-first workflow for slow RSLogix 500 online editing that separates workstation rendering, communications latency, project consistency, controller resources and process risk before changes are accepted.

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Grain dryer automation system with PLC I/O sensors and operator interface

Sizing PLC I/O and Sensors for Grain Dryers

Size grain-dryer PLC I/O from approved operating sequences, hazard analysis, area classification, and failure responses—not generic point counts, dust classifications, or spare percentages.

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SLC 5/04 day-of-year code for industrial label printing

SLC 5/04 Day-of-Year Codes for Label Printers

Build a validated YYYYDDD production code in an SLC 5/04. This guide separates ordinal day from Julian Day Number and covers clock sampling, leap years, overflow, formatting, and printer handshakes.

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