Yokogawa ALE111-S00 Ethernet Communication Module

The Yokogawa ALE111-S00, also cataloged as the ALE111-S00 Ethernet Communication Module, serves as the primary ALE111 Ethernet Communication Module utilized to execute subsystem network interfacing and data packet exchange across Yokogawa Distributed Control System platforms.

Hardware Specifications

Process Control and Distributed Control Architecture

• Multi-Protocol Subsystem Interfacing The communication module executes dedicated driver stacks within its firmware to establish deterministic data mapping links with external programmable logic controllers and data acquisition nodes. The subsystem interface framework actively supports Modbus, FA-M3, MELSEC, YFGW, DARWIN/DAQSTATION, and PLC-5/SLC500 communication protocols.
• Deterministic Backplane Bus Ingestion The module mounts directly into standard Yokogawa node units and field control units, including ANB10, ANB11, ANR10, AFF50, AFV10, AFV30, and AFV40 chassis. It captures external device registers and injects the processed data packets into the high-speed controller backplane bus within a fixed, predictable processing window.
• Standardized Ethernet Physical Layer Execution Operating on an IEEE802.3 10BASE-T physical layer, the network controller utilizes standard CSMA/CD media access protocols. It routes data packets over 100 ohm unshielded twisted-pair (UTP) copper cabling across a maximum structural segment length of 100 m between the field control station or network hub and the peripheral subsystems.

Frequently Asked Questions

Q: Can the ALE111-S00 port be forced to operate in Full-Duplex mode to match modern network switches?

A: No. The ALE111-S00 hardware layer is strictly restricted to Half-Duplex transmission at a fixed speed of 10 Mbps. Connecting the module to an external switch requires setting the corresponding switch port to auto-negotiation or forcing it to 10 Mbps Half-Duplex to prevent duplex mismatch errors and packet collisions.

Q: What happens to the controller data registers if the RJ-45 communication link fails?

A: Upon loss of the physical Ethernet link or communication timeout, the module triggers an internal diagnostic fault bit across the backplane bus. The hosting Yokogawa field control station intercepts this flag and updates the associated data registers to a "Bad" status, allowing the control logic to execute fallback safety procedures.