Option Adapters

Front Panel Components, Continued

MB+ ACT Flash

This table provides the patterns that the MB+ ACT indicator will flash to indicate the

Patterns

status of the Modbus Plus node.

 

 

 

 

Pattern

Meaning

 

 

 

 

6 flashes/s

This is the normal operating state for the node. It is

 

 

receiving and passing the network token. All nodes on a

 

 

healthy network flash this pattern.

 

 

 

 

1 flash/s

The node is offline just after power-up or after exiting the

 

 

6 flashes/s mode. In this state, the node monitors the

 

 

network and builds a table of active nodes. After being in

 

 

this state for 5s, the node attempts to go to its normal

 

 

operating state, indicated by 6 flashes/s.

 

 

 

 

2 flashes, then OFF for 2s

The node detects the token being passed among the other

 

 

nodes, but never receives the token. Check the network for

 

 

an open circuit or defective termination.

 

 

 

 

3 flashes, then OFF for 1.7s

The node is not detecting any tokens being passed among

 

 

the other nodes. It periodically claims the token but cannot

 

 

find another node to which to pass it. Check the network for

 

 

an open circuit or defective termination.

 

 

 

 

4 flashes, then OFF for 1.4s

The node has detected a valid message from a node using

 

 

a network address identical to its own address. The node

 

 

remains in this state for as long as it continues to detect the

 

 

duplicate address. If the duplicate address is not detected

 

 

for 5s, the node changes to its 1flash/s mode.

 

 

 

 

ON

Indicates an invalid node address.

 

 

 

 

OFF

Possible fault with Modbus Plus Option Adapter.

 

 

 

Continued on next page

82

870 USE 101 10 V.2

Page 82
Image 82
Schneider Electric Processor Adapter manual MB+ ACT Flash, Patterns, Status of the Modbus Plus node