Train depart MSL SB at 1kph. TSC did VOBC switchover. Train EB applied when 'B' side cab door opened . TC released EB-ok. Train proceed in normal speed. EB appli ed once more when train was departing ADM SB. TC thereafter, ~~~~~ Train depart MSL SB at 1kph. TSC did VOB        #3679 B Side cab door able to self open when for pull.Adjust the cab door magnet sensing s/w and function test ok.No reoccurance DIR-ok.ER download PTU006. ER show #3679-DIR twice when moveing off (Time:6.57am,7.05am) Done by Alauddin/Zulq. 05/09/21