Compatible Devices
- Allen‑Bradley PLC‑5 with Ethernet capability
- Allen‑Bradley SLC with Ethernet capability
- Allen‑Bradley MicroLogix with Ethernet capability [g3-df1tcp | Word]
Verified Device
- SLC 5/05 [g3-df1tcp | Word]
Device Selection
Many PLC‑5 users may use the SLC device selection.
To use this option, the PLC‑5 must support:
- “Protected typed logical write with three address fields” commands [g3-df1tcp | Word]
Accessible Data
| **Prefix** | **Description** |
|---|---|
| O | Outputs |
| I | Inputs |
| S | Status |
| B | Bits |
| N | Integers |
| T | Timers |
| C | Counters |
| F | Floating Point |
| L | Long Word |
| R | String Area (80 characters support) * |
* When mapping String Area to arrays, use 80 characters per string [g3-df1tcp | Word]
Cable Information
- Standard 10‑Base‑T Ethernet cable [g3-df1tcp | Word]
Summary
This driver provides Ethernet-based DF1 communication using Allen‑Bradley addressing. Key characteristics:
- Uses classic Allen‑Bradley file structure (O, N, T, etc.)
- Supports Ethernet instead of serial (DF1 TCP encapsulation)
- Allows string access (80-character blocks)
- Compatible with PLC‑5, SLC, and MicroLogix Ethernet processors
👉 Practical takeaway:
- This is essentially DF1 over TCP/IP, making it ideal when you want legacy AB data access over Ethernet without moving to EtherNet/IP.
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