ABB 3BDH000032R1
ABB 3BDH000032R1
ABB 3BDH000032R1
绍了通过DP总线建立MM440（版本V2. 09及以上）和S7-300之间的通讯，对于不同数据结构类型的参数，则分别以具体例程介绍了以周期和非周期通讯方式来读写参数的不同方法，同时对周期和非周期通讯报文结构进行了说明。
MM440变频器既支持和主站的周期性数据通讯，也支持和主站的非周期性数据通讯，即S7-300可以使用功能块SFC14/SFC15读取和修改MM440参数值，调用一次可以读取或者修改一个参数。同时也可以使用功能块SFC58/SFC59或SFB52/SFB53读取和修改MM440参数值，一次最多可以读取或者修改39个参数。
have been expanded. any complex control
The scheme can be realized by the combination of these function blocks.
The function blocks provided by the system mainly include the following categories:
o
Analog processing
o
digital processing
loop regulation
Logical sequence control
c
logic operation
Monitoring function
Collection function.
c
arithmetic operations
c
TCP/IP protocol communication interface
Modbus protocol communication interface
1EC870-5 protocol communication interface (Telecontrol)
4.2 Field Controller PS
Industrial” field controller PS is a special process control station, which is embedded with field bus communication interface for users to use
Fieldbus technology offers very flexible options. Each PS allows to insert 4 fieldbus interface cards (the card type can be different),
Each card is connected to 1 field bus to collect process data and diagnostic information from the bus, the interface card is easy to replace and plug and play
(Plug & Play), and can be plugged and unplugged.
The field controller PS has the following characteristics:
o
Flexible: supports all international standard open fieldbuses and can be mixed
Simultaneous connection of 4 high-speed fieldbuses (max. 12 MBd)
Simple engineering: configuration, commissioning and diagnostics using only the same tool CBF (Control
