From OpenSCADAWiki
Default values of the command-line options and generic parameters you can pass through environment variables in form "OSCADA_{OPT}={VAL}" after enabling by the environment variable OSCADA_CMD_EN, like to — OSCADA_CMD_EN=1 OSCADA_log=0 OSCADA_limObjDscr_SZ=1000 OSCADA_sub_UI_mod_QTStarter_Style=Fusion ./openscada_AGLKS. That is you can prepare individual default environment of OpenSCADA execution for your system in whole in a file of the folder /etc/profile.d/ or for concrete user in the file {USER-HOME}/.profile.