How To Get A Template Variable From An ID (Not Current Resource)

[[#id.tvname]]

[[#[[*parent]].tvname]]

$resource = $modx->getObject('modResource',$id);
return $resource->getTVValue('myTV');

$tvId = 12; // ID of the TV
$tv = $modx->getObject('modTemplateVar', $tvId);

$tv= $modx->getObject('modTemplateVar', array('name' => 'TvName'));

$resourceId = 12; // ID of the resource you want the value for
/* Get the raw value of the TV (faster, if you can use it) */
$value = $tv->getValue($resourceId);

/* Get the rendered value of the TV */
$value = $tv->renderOutput($resourceId);