采用什么协议？ 连接到840Dsl NCU那个口？
NCU上有很多接口
PLC I/O via PROFIBUS DP or PROFINET I/O
MPI
Ethernet IE1/OP X120 (Eth 2)： Connection to the system network with preset IP address
192.168.214.1 with subnet screen form 255.255.255.0
and active DHCP server for SINUMERIK
Ethernet IE2/NET X130 (Eth 1)： Connection to company network as standard DHCP
client
PROFIBUS DP1 X126
PROFIBUS DP2/MPI X136
Ethernet X127 (Ibn 0)： Service terminal with fixed IP address 192.168.215.1 and
fixed subnet screen form 255.255.255.224 with active
DHCP server
---------------
连接到不同的Profibus 总线上HMI能全部访问吗？
例如：如果 HMI连接到profiNet上 ，能访问DP上的IO状态吗？