Do you have software access to view and configure the DeviceNet network, such as RSNetWorx for DeviceNet?
So it is possible that the DNI "might" need to be "touched"?
As I've mentioned, there are also parameters in the DNI to configure the default integer Data Files for the DF1 controller I/O data mapping. These parameters should have been set to "7" for the default N7 Data File in the MicroLogix 1000 and should be left at "7" for the MicroLogix 1400, as its default is also the N7 Data File. However, if for instance you are now using say an N10 Data File in the MicroLogix 1400, then you would have to change these parameters from "7" to "10".
Note: If you do find you need or would like to change any parameter settings in a Series B DNI, then you must first set it into idle mode. You do this by first setting parameter 0012 "I/O Scan Enable" to "0" - "Disabled" and then, after you've changed any parameters, set it back to "1" - "Enabled"