From the freely available from GW IG reference sheet, so I can repeat it here for the avoidance of doubt.
Profile 1. 36", S10, Ap2, large blast, Ordnance
Profile 2 48" S10, AP1, small blast, 2d6 added together
There are NO restrictions on moving and firing normal(i.e. not barrage) ordnance weapons over and above a normal weapon of their strength.
You may not fire ordnance and any other weapon, unless you have a special rule, which Russes do, but the vanquisher cannon isn't ordnance anyway...