Key Features

1. Hardware Specifications

• Interface: PCI-Express x1 (v2.0 or later)
• Ports: 2× RJ45 (10/100/1000 Mbps auto-negotiation)
• Chipset: Yokogawa-proprietary ASIC for Vnet/IP protocol
• Style: S1 (hardware revision for legacy compatibility)
• Part Marking: AS-S9881DJ-01 (manufacturing code)

2. Communication & Performance

• Protocols:
  • Vnet/IP (Yokogawa’s real-time Ethernet, ≤1 ms cycle time)
  • Standard TCP/IP (for non-real-time traffic)
• Deterministic Latency: <100 µs (Vnet/IP mode)
• Jumbo Frames: Supports up to 9KB MTU for throughput optimization

3. Compatibility

• Systems:
  • CENTUM VP (R4.x to R6.x)
  • ProSafe-RS (safety systems)
• OS Support:
  • Windows 7/10 (32/64-bit, with Yokogawa drivers)
  • Yokogawa HIS (Human Interface Station)

4. Redundancy & Diagnostics

• Dual-Port Failover: Automatic switchover if primary link fails
• LED Indicators: Link/Activity (per port) + system status
• Hot-Swappable: Driver supports hot-plug in supported OS

Installation & Configuration

1. Hardware Setup

• Insert into PCIe x1 slot (x4/x8 slots supported at x1 speed).
• Connect ports to Vnet/IP switches (e.g., YSW-1100) via CAT6 cables.

2. Software Setup

1. Install Yokogawa Vnet/IP drivers (from CENTUM VP media).
2. Configure in CENTUM VP Engineering Studio:
   • Assign Vnet/IP addresses (e.g., 172.16.x.x).
   • Enable QoS tagging for real-time traffic.

3. Network Best Practices

• Segmentation: Isolate Vnet/IP traffic via VLANs.
• Cabling: Use shielded twisted-pair (STP) for EMI immunity.

Part Number Breakdown

Note:

• For newer systems, Yokogawa may recommend VF711 (PCIe x4, 10Gbps).
• Style S1 may lack features in newer revisions (e.g., SR-IOV support).

Troubleshooting

• No Link: Verify driver installation and switch port settings.
• Latency Spikes: Check for network congestion or faulty cables.
• Legacy OS Issues: Windows 10 requires signed drivers.

SKU: YOKO-VF702S1