Stale / Communication Failure - Emerson IEC 62591 Instruction Manual

IEC62591 Wireless Interface Instruction Manual (for ROC800-Series and FloBoss 107)

4.3.2 Stale / Communication Failure

4-4
Figure 4-1. NaN warning in Transmitter tab)
When NaN is reported, the RTU supports a failsafe operation defined
by the user (Retain Last Value, Use Failsafe Value).
Figure 4-2. User-defined failsafe operation
If the RTU reports a Stale or Communication Failure status in the
Communication Status field, interrogate the transmitter using
475/AMS/Field Tools. The location of the transmitter's network
diagnostics can be found the transmitter's manual.
Additionally, if the RTU reports a Stale status, assess the physical
layout of the network. The Stale status can be triggered if there is any
kind of physical anomaly in the network (tanker trucks between
transmitter and RTU, transmitter between the end device and the RTU is
powered down, etc.).
The RTU supports gathering Diagnostic Logs of the wireless network.
You can extract these logs and send them to Technical Support for
further analysis of the network issue.
Troubleshooting Revised June-2018