Fallback Strategy
Original instructions
Overview
The CANopen X80 master module switches in FALLBACK state:
The following table gives an overview of the module behavior following a PLC STOP:
RIO Scanner
DIO Scanner
BMEP58•040
BMEP58•040
BMEP58•020
Default configuration
Default configuration
Default configuration
User configuration
EtherNet/IP
Connection(1)
Open
Closed
Open
Closed
Run/Idle flag
Run
Idle
Data (I/O Exchange)
Hold previous
No exchange.
Device DDT is cleared
Hold previous
No exchange.
Device DDT is cleared
(1) 
CIP connection between the CPU and the CANopen X80 master module.
Output Fallback Strategy
In FALLBACK state the module applies the fallback strategy configured in the Ethernet IO tab of the DTM:
Input Fallback Strategy
In case of EtherNet/IP connection is lost between the PLC and the BMECXM module, all inputs values of the device DDT are set to 0 (zero), including the Health bits.
In case of PLC stopped event, the behavior of inputs differs according to the EtherNet/IP connection state: EtherNet/IP connections are closed: input data values are set to 0 (zero). EtherNet/IP connections are not closed, Run/Idle flag to Idle: input data are refreshed EtherNet/IP connections are not closed, Run/Idle flag to Run, output data contains the CPU state (STOP): input data are refreshed
States in Fallback Mode Strategy
The following diagram gives the CANopen fieldbus states in fallback mode: