Cause : External warning 2 . Fault in external device 2 comes when fault in external device 2 which is used for generate fault in drive or connection brake between drive and external device.

1. This is a Programmable warning: 31.03 External event 2 source & 31.04 External event 2 type
2. Check the external device.
3. Check setting of parameter 31.03 External event 2 source.