Set,<%Variable%>,<NewValue>[,GLOBAL / PERMANENT]
With this command we can change the value of a variable. If more variables are linked to this variable, then you might need to call System,RefreshVars to ensure that all variables get refreshed values and work properly.
WB076 added a new variable handling mechanisim that makes System,RefreshVars unnecessary.
Usually the variable's definition has a lifetime of the current script.