I am trying to integrate orion jr 2 bms with victron energy multiplus 12v,1200w ,I even did so I have successfully controlled the charging current but I am not able to control the discharging current ,can any one help?
You will be better off asking Orion for assistance, they have a victron profile for their BMS, you will need to customise it accordingly for your battery.
If you are new to this I would encourage you to get professional help as getting it wrong can be expensive or dangerous, but third part BMS config is beyond the scope of this community.