Front panel components, continued – Schneider Electric Processor Adapter User Manual
Page 81
Option Adapters
870 USE 101 10 V.2
81
Front Panel Components, Continued
LED Indicators
This Option Adapter has three LED indicators. Their functions are described in the
table below.
Continued on next page
LED
Status
Function
MB+ ACT
Green
Indicates activity on one or both of the Modbus Plus ports (see
the flash pattern table below)
Off
No activity on either Modbus Plus port
ERR A
Red
Indicates a communications failure on Modbus Plus port A*
Off
No problems detected on Modbus Plus port A
ERR B
Red
Indicates a communications failure on Modbus Plus port B*
Off
No problems detected on Modbus Plus port B
* If you are not using redundant cabling on the Modbus Plus link (i.e., if only one of the ports
is being used) the Error LED for the unused port will be on constantly when Modbus Plus
communication occurs on the network.