Metasys Graphics Show "????" Question Marks (All Values Offline)

Problem

Metasys UI suddenly shows all readings as "????" across all graphics. System was working yesterday. Operators can't read setpoints or status.

Root Cause

Network Engine (NAE/SNE) is offline or experiencing network communication loss. All downstream controllers unable to report values to Server.

Solution

1. Check Network Engine Status:

   • In Metasys Server, navigate to the Network tab
   • Look for the Network Automation Engine (NAE) or Site Network Controller (SNC)
   • If you see a red "X" next to it, the engine is offline

2. If Engine is Offline:

   • Check 24VAC power to the engine (verify with multimeter if possible)
   • Listen for the power supply—should have a slight hum
   • If no power, check circuit breaker and wiring connections

3. Verify Network Communication:

   • Check Ethernet connection to the engine (look for link light on port)
   • Try power-cycling the engine (unplug 10 seconds, plug back in)
   • Wait 2–3 minutes for full startup and discovery

4. Use FQR Hyperlinks to Isolate Problem:

   • Click on any "????" value in the graphics
   • In the pop-up, a fully qualified reference (FQR) will appear as a hyperlink
   • Click the FQR to navigate to the Network tab and see which controller owns that point
   • If the controller shows red "X", it's offline or unreachable

5. If Specific Controllers are Offline:

   • Check controller power and network wiring
   • Verify Ethernet switch port for that controller (check for link light)
   • Try replacing the network cable (bad cable is surprisingly common)

6. If Engine Restarted Recently:

   • Engine may be re-discovering controllers—wait 5–10 minutes for full sync
   • Check Event Log in Metasys UI for "discovery" events