Status Indicators

Overview

This section describes the status indicators for each model, gives a diagram of the indicators, and explains how to interpret the indicator patterns.

Indicators

Each model has a front panel indicator showing its network communication status.

The dual-cable model has two additional indicators which identify communication errors on the two cable paths.

Diagram

The communication status and error indicators are shown in the diagram below

Modbus Plus Active Indicator Patterns

The table below describes the status associated with each active indicator pattern.

Indicator Pattern (Green)	Status
Six flashes/second	Normal operating state. All nodes on a healthy network flash this pattern.
One flash/second	The node is off-line. After being in this state for 5 seconds, the node attempts to go to its normal operating state.
Two flashes, then OFF for 2 seconds	The node detects the network token being passed among other nodes, but it never receives the token.
Three flashes, then OFF for 1.7 seconds	The node does not detect any token passing on the network.
Four flashes, then OFF for 1.4 seconds	The node has detected another node using the same address.

Modbus Plus Channel Error Indicators

Model 170 PNT 160 20 displays the following error indicator patterns:

Indicator (Red)	Status
Channel A Error	Communications error at network port A.
Channel B Error	Communications error at network port B.