ABS Printing with Heated Bed

#1
I'm using Silplify3D printer software and GMax printer. I have the bed set to 90C. The software shows 200C but the GMax shows 240C I think the 240C is right but that's not my problem. Partially thru the print the GMax has an error "Max Temperature" and stops. Any help on correcting this error?

Last the ABS sticks so good to the heated bed it's hard to get off, any suggestions?? I do wait for the bed to cool.
 
#2
I turned down the extrude temperature to 230C that kept the Max Temperature error away but now it seems like it may not be hot enough because the filament gets stuck in the nozzle and that messes uo the entire print.