There is no Constitutional right to a bond on a violation of probation, which means the Judge can hold you in jail on no bond until your hearing date. While some Judges will give bonds on minor violations, if you are on probation for a serious offense or you commit a new crime while on probation you will likely not get a bond.
You will have a right to contest the violation of probation at a hearing. This hearing is in front of a Judge, there is no right to a jury and the state does not have to prove the violation beyond a reasonable doubt like in your original criminal case. In a VOP (violation of probation) the Judge just needs to find based on the evidence that it is more likely than not that you violated the terms or conditions of your probation.