Applicable Systems
PanelView Plus 7
Symptoms
Intermittent 'Device Not Found' message on DH+ or ControlNet interface.
Possible Causes
- Loose or oxidized connector on the DH+ tap or ControlNet BNC coax.
- Duplicate node address on the network causing arbitration collisions.
- Excessive network traffic from misconfigured producer/consumer tags.
Troubleshooting Steps
- Step 1: Inspect BNC terminators (75 Ohm) at both ends of the ControlNet trunk.
Terminators are present, tight, and within 72–78 Ohm measured resistance. - Step 2: Use RSNetWorx to scan the network and verify all node addresses are unique.
No duplicate node IDs reported and all devices respond to explicit messaging. - Step 3: Check the PanelView node address switch settings against network documentation.
Switch settings match the assigned node address in the project file.
How to Reset
Power down the network segment, reseat all connectors, verify unique node addresses, and restart the PanelView.
Common Replacement Parts
- 75 Ohm BNC terminator: 75 Ohm BNC terminator
Source: Allen-Bradley PanelView Plus 7 Network Configuration Guide
Category: HMI