Faulty Loop Status / Mixed Network Modules

What does F112 mean?

The network loop is in a faulty state, indicating a serious communication problem. This can be caused by physical network issues or incompatible network module types being mixed within the same system.

• Faulty network cables or incorrect cable wirings
• Faulty network hardware
• Electrical noise
• Duplicate station numbers or duplicate control/remote master stations
• Mixing of MESLECNET/H and MELSECNET/10 network modules in the same system

Click steps to track your progress.

1. 1

   Inspect network cables for damage, integrity, and correct wiring

2. 2

   Check for sources of electrical noise impacting communication

3. 3

   Verify all station numbers are unique

4. 4

   Confirm control station and remote master station settings are not duplicated

5. 5

   Ensure that only one type of network module (e.g., MESLECNET/H or MELSECNET/10) is used within the same network, matching the control station type

6. 6

   Check for faulty network hardware