过程控制站内部通讯(控制器与I/0 等各种智能设备或现场仪表间)采用的是国际标准现场总
线。现场控制器支持Profibus等各种现场总线，Profibus 是目前世界上应用最广泛的开放型现场总
线国际标准，分为FMS、DP 及PA三级，DP 通讯速率可高达12Mb。而CAN (DIN/IS011898 标准)总线
最大特点是它的超级坚固性和数据安全性。
package.
Project database
All configured signals, variables and process points are in Freelance
800F system’s public database for management.
● List of all variables (input, output, internal variables)
● Process point list (function block)
●Graphics
●Program
Because the database is system-wide. The data only needs to enter a
times, to avoid possible errors caused by multiple configurations.
Project database files can be easily archived or backed up.
When programmed by the user, a list of variables and labels is automatically created.
Moreover, both variables and process points can be opened and closed
