Chapter 5 — Troubleshooting

5 Troubleshooting

Several hardware diagnostics capabilities have been implemented using the LED indicator lights on the front of the 1560-MBP card.

5.1LED Locations

The location of the LEDs on the units are shown in the following diagrams:

L

 

Modbus Plus Port Status

 

N

G

SCANport Status

LED Locations

5.1.1 LED Troubleshooting Table

The following table details the meaning of the LEDs in the 1560- MBP unit.

NAME

Color

Status

Indication

 

 

 

 

Modbus Plus

Green

Six flashes

The 1560-MBP is working normally in

Port Status

 

per second

that it is successfully receiving and

 

 

 

passing the token. All nodes on the link

 

 

 

should be flashing this pattern.

 

 

 

 

 

 

One Flash

This node is off-line after just being

 

 

per second

powered up, or after exiting the four

 

 

 

flashes per second mode. In this state,

 

 

 

the node monitors the network and

 

 

 

builds a table of active nodes and

 

 

 

token-holding nodes. It remains in this

 

 

 

state for five seconds, then attempts to

 

 

 

go to its normal operating state.

 

 

 

 

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SMC Networks 1560 user manual LED Locations, LED Troubleshooting Table