@machines = ('machinename','machinename2');
${'machinename'}{'config'}   = 2000;
${'machinename'}{'speed'}    = 19600;
${'machinename'}{'setting'}  = value1, value2, value3;
${'machinename2'}{'config'}  = 2020;
${'machinename2'}{'speed'}   = 19600;
${'machinename2'}{'setting'} = value1, value2, value3;
etc...