RIEVTECH STUDIO SOFTWARE MANUAL l Pre-set Station No. The option “ Pre-set Station No. ” is used to set the PLC station number. You can set it byConstant orVariable. You can input a fixed station number of the connected PLC by Constant way. It is the default station number for the new address. The station number which is already set will not change if you modify the preset station number. You can use the button “ Synchronize Station No. ” to unify the station number. You can set the “ Pre-set Station No. ” by variable. It means the preset station number will depend on the value of a variable which you can input by a numeric value input 446