Code:
$ awk '$10==24{$10="8"} $10==8{$10="5"} $10==0{$10="6"}1' FS=, OFS=, input.txt
Col1,Col2,Col3,Col4,Col5,Col6,Col7,Col8,Col9,Col10,Col11,Col12,Col13,Col14,Col15,Col16,Col17
2015/03/14 15:00:04,2015/03/14 15:00:04,0,Server05,Omega-God,Beta_G,101011247,1,1,5,7,0,,339083645,1,1,
2015/03/14 15:13:48,2015/03/14 09:40:38,0,Server04,Omega-God,Beta_G,101011247,5,1,5,7,0,,319207661,1,1,103510841
2015/03/14 15:14:55,2015/03/14 09:40:38,0,Server04,Omega-God,Beta_G,101011247,6,1,5,7,0,,319207661,1,1,
2015/03/14 15:29:56,2015/03/14 09:40:38,0,Server03,Omega-God,Beta_G,101011247,7,1,5,7,0,,319207661,1,1,
2015/03/14 15:50:53,2015/03/14 09:40:38,0,Server04,Omega-God,Beta_G,101011247,8,1,5,7,0,,319207661,1,1,103510841
2015/03/14 18:50:58,2015/03/14 09:40:38,0,Server04,Omega-God,Beta_G,101011247,12,0,6,0,1,1,319207661,1,1,103510841
2015/03/14 18:51:03,2015/03/14 09:40:38,1,Server01,101011247,Server04,Omega-God,1,0,6,0,1,1,347955199,1,1,
2015/03/14 18:51:11,2015/03/14 15:05:19,1,Server04,101011247,Server04,Omega-God,1,0,6,0,1,1,347963352,1,1,