Proworx | 32

Modbus Plus (MB+) was Modicon’s proprietary high-speed token-passing network. ProWORX 32 includes a built-in Modbus Plus Peer Cop configuration tool, allowing engineers to set up global data links between multiple PLCs without complex messaging code.

If you are planning a migration, here is how ProWORX 32 stacks up against current software: proworx 32

| Feature | ProWORX 32 | Control Expert (Unity Pro) | | :--- | :--- | :--- | | Programming Languages | 984 Ladder Logic only | LD, FBD, ST, IL, SFC | | Data Types | Limited (3x, 4x, 0x, 1x) | Rich (UDTs, arrays, ENUMs) | | Ethernet/IP | No | Yes | | OPC UA | No | Yes | | Online Change | Yes (limited) | Yes (advanced) | | Learning Curve | Low (for veteran techs) | Moderate | | Cost | Discontinued (used licenses only) | Active licensing | Note: Schneider Electric no longer sells new ProWORX

Note: Schneider Electric no longer sells new ProWORX 32 licenses. If you need a license, you must buy it on the secondary market or find an old installation DVD from a decommissioned laptop. By the mid-2000s, the automation world was moving

By the mid-2000s, the automation world was moving toward the IEC 61131-3 standard. Schneider Electric introduced Unity Pro (later EcoStruxure Control Expert) for the new Modicon M340, M580, and Quantum V2.0 PLCs. Unity Pro offered tag-based programming, user-defined function blocks, SFC, ST, and much better memory management.

Schneider officially discontinued ProWORX 32 around 2010, ceasing technical support and new sales. However, they provided conversion utilities to migrate ProWORX 32 projects (.PRO files) into Unity Pro. The conversion was rarely perfect—function blocks might be misaligned, comments lost, or addressing schemes mangled—so many sites chose to keep running ProWORX 32 on dedicated legacy engineering workstations.

A Tier 1 automotive supplier has a transfer line controlled by ten Modicon 984-685 PLCs. The line produces $500,000 worth of parts per shift. Retrofitting to a new control platform would cost $2 million and require two weeks of downtime. Instead, the plant keeps a dedicated Windows XP laptop with ProWORX 32 to troubleshoot and make minor logic changes.