A.PROFINET
B.PROFIBUS-DP
C.EtherNET
D.MPI
When will a company renew an existing model?
A.When it sells well and brings in a good profit.
B.When it needs improvement to meet the needs of users.
C.When some of its features have to be deleted.
D.When certain options have to be added.
A.分析器执行的结果放在G表里面
B.分析器不是自动执行的,要手动刷表
C.先要把结果刷到表里面,才能优化执行结果
D.-prof选项,可以避免造成内存溢出
A.PROFIBUS-DP用于现场一级的高速数据传送
B.传输波特率从9.6kbps到12Mbps
C.传输介质只可用RS485双绞线
D.每个DP从站的输入和输出数据最大为246字节