thanks siemens!
the setting of p700,p701 are same as the value in simovis!!
the rs232 line is also ok,because it works between simovis and simoreg (6ra70)!!
I made a rs232/rs485 converter today and solved this problem!!
but i think this is a strange problem!!
I need the manual of 6se70!!! who can help me ,thanks a lot!!