Rockwell Automation 56AMXN/B ControlLogix AutoMax Comm Module - Manual (Page 8)

Page 8 AutoMax DCSNet /RE RIO Module
Publication number 56AMXN-UM002A-EN-P November 2002
In remote I/O operation, if the ControlLogix was in program mode, the
56AMXN/A set outputs to 0. If there was a loss of connection, outputs
held their last state
The 56AMXN/B firmware sets the outputs to 0 in program mode or on
loss of connection in DCS Master and Slave and Remote I/O operation.
The 56AMXN/B is backward compatible with the 56AMXN/A.
Applications written for the 56AMXN/A do not require modification to
run on the 56AMXN/B. However if you want existing applications to use
the multiple connection feature of the 56AMXN/B, those applications
must be modified.
The firmware in a 56AMXN/A can be FLASH upgraded to 56AMXN/B
operation. Refer to page 67 for details.