例子用到的块：
OB1:cyclic program processing
OB100:startup OB for restart
FC100:FC for start OB
FC210:FC calling SFB BSEND
FC230:FC calling SFB BRCV
FC250:FC calling SFB STATUS
DB22:instance DB fOr STATUS
DB50:instance DB for BSEND
DB70:instance DB for BRCV
DB400:work DB for FC210 and BSEND
DB401:work DB for FC230 and BRCV
DB410:BSEND source DB with send data
DB430:BRCV destination DB for receive data
DB450:work DB and systat receive DB for FC250 and status

哪些数据需要修改？怎么修改？谢谢了