The TINE instant client gives access to the system:
$ /usr/lib/jvm/jdk-8-oracle-x64/jre/bin/javaws \ -localfile -J-Djnlp.application.href=https://www-zeuthen.desy.de/pitz/apps/jaws/ticlient/ticlient.jnlp \ /home/p99user/.java/deployment/cache/6.0/27/36bb80db-5ab8e0c3
You have to select contect, server, etc.:
Device Context PETRA Device Server GLOBALS Device subsystem ALL Device name keyword
The tget command is another way to check specific parameters:
$ tget "PETRA/GLOBALS/keyword" BeamCurrent