IS200ACLEH1B
IS200ACLEH1B
IS200ACLEH1B
介绍了如何在WinCC中使用BSEND/BRCV类型的原始数据类型，来实现与S7-300/400 PLC的大数据量交换。
WinCC支持Rawdata（原始数据）类型的变量，可以实现和PLC的批量数据交换。其中Send/Receive类型的Rawdata变量因其受PDU尺寸的限制（240/480字节），故最大尺寸为208/448字节，能够实现中小规模的批量数据交换。
但对于大批量的数据交换可以考虑使用AR SEND和BSEND/BRCV功能。两者都需要PLC端调用功能块，主动将最大16K字节的数据发到WinCC的Rawdata变量。AR_SEND(SFB37)只适用于S7-400系列PLC，S7-300PLC不支持。
而对于BSEND/BRCV功能，PLC端需要调用BSEND/BRCV功能块(SFB12/13，FB12/1 3)将数据发送给WinCC的Rawdata变量。使用S7-300PLC也可以实现（需要CP模板或集成的PN口等硬件支持）。但WinCC无法直接在画面中使用该变量，需要用脚本处理字节数组的方式来访问它。
本文以Step7 5.4、WinCC V6.2和CPU315—2 PN/DP为例，利用以太网实现8K字节的批量数据交换。
operators
station (800xA) or other OPC client. Freelance Control System
Real-time process values ??and alarms in the system can be accessed via OPC.
We also provide a C language programming interface to embed external
In Windows operating system applications, it is suitable for implementing user
Communicate with non-standard OPC, ie DMS-API software 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 directly in FBD or IL
Revise.
List other features include:
Project-wide modification of names, comments, data or module types
●Search and display based on specific criteria
● Cross reference can be used in systems that use a large number of variables or process points
Programs and drawings to quickly find the desired variable or process point within the scope
noodle.
ABB is the world’s largest in measurement and process automation
One of the equipment and system suppliers.
An important factor in maintaining this market position is the quality of our products
quantity, and quality from manufacture all the way to service. ABB automation early
In 1990, it obtained the DQS certificate based on ISO9001 certification,
EQnet quality based on ISO 9000/EN 29000 was subsequently achieved
Certification.
However, the Freelance 800F is more than technical excellence, I
We have also spent a lot of effort in proper planning, installation and revision too
This makes engineering design and maintenance faster, more economical and more efficient.
Industrial” is a world-leading all-round integrated open control system launched by ABB Group Automation Headquarters.
It integrates the advantages of traditional DCS and PLC in one body and supports a variety of international field bus standards. It has both the complex analog loop regulation capability of DCS
Power-friendly human-machine interface (HMI) and convenient engineering software, and at the same time have high-speed logic and sequence control equivalent to high-end PLC indicators.
control performance. The system can be connected to both conventional I/0 and various field bus devices such as Profibus, FF, CAN, and
