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西門子 6ES7134-4FB52-0AB0    西門子 6ES7134-4FB52-0AB0   西門子 6ES7134-4FB52-0AB0 

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1. HART變量的基本概念與基本使用

1.1 簡介
HART (Highway Addressable Remote Transducer)，可尋址遠程傳感器高速通道的開放通信協(xié)議, HART協(xié)議使用FSK技術(shù)，在4~20mA信號過程量上疊加一個頻率信號，成功的實現(xiàn)模擬信號和數(shù)字信號雙向通訊，而不互相干擾。
HART 模擬量模塊是指除了可以提供模擬量數(shù)值外，還可以提供 HART 通訊功能的模擬量模塊。HART 模擬量模塊可以用于PROFIBUS-DP 的分布式 I/O 從站中。（使用6ES7153-2BA02-0AB0及更高版本或6ES7153-2BB02-0AB0及更高版本的接口模塊作為連接 PROFIBUS-DP 的從站接口）。

1.2 多變量讀取
在實際應(yīng)用中通常用SFC58，SFC59進行數(shù)據(jù)記錄的讀寫實現(xiàn)多變量的讀取。但6ES7153-2BA02-0AB0 或更高版本可以使用HART變量直接進行多變量的讀取。

1.3 HART變量
基本要求：IM 153-2（6ES7153-2BA02-0AB0 或更高版本）和 STEP 7（V5.4 SP3 或更高版本）
地址分配：HART 模塊占用 16 個輸入/輸出字節(jié)。 如果組態(tài) HART 變量，該模塊將為每個 HART變量分配5 個字節(jié)，其中4個字節(jié)表示過程值，一個字節(jié)表示質(zhì)量代碼。
HART變量數(shù)量：6ES7153-2BA02-0AB0模塊可以最多分配 8 個 HART 變量，每個通道的HART 變量不超過 4 個。 您可以在模塊的屬性對話框中為通道分配 HART 變量。
IO資源：如果使用全部 8 個 HART 變量，則 每個HART 模擬量輸入模塊總共占用 56 個輸入/輸出字節(jié)（16 個字節(jié) + 8 x 5 個字節(jié) = 56 個字節(jié)）?！盁o”組態(tài)不占用其它輸入字節(jié)。
組態(tài) HART 變量：可以在 STEP 7 HW Config 中分配 HART 變量。
多變量：PV，SV，TV，QV
● PV（Primary Variable，主變量）
● SV（Secundary Variable，二級變量）
● TV（Teritary Variable，三級變量）
● QV（Quatenary，四級變量）

HART變量結(jié)構(gòu)：

圖1

質(zhì)量代碼含義：

 表1

1.4 直接讀取HART變量的條件：
(1) IM支持這種通訊方式
(2) 模板信息中有hart variables的可以支持
(3) 儀表本身也要能支持多變量
只有在三者滿足的情況下才可以通訊成功。

接口模板是否支持直接讀取HART變量請參見下圖：
6ES7153-2BA02-0AB0:

圖2

6ES7153-2BA01-0AB0:

圖3

HART 模擬量模塊是否支持直接讀取HART變量請參見下圖：
其中6ES7331-7TF01-0AB0支持。6ES331-7TF00-0AB0不支持。

圖4

2. 工程實例

2.1 軟硬件列表

表2

2.2 HART模板接線方法：
對于6ES7331-7TF01-0AB0模板和HART儀表的接線，請參見下圖：
(1)、紅色線為 +24V，黑色線為 0V。
(2)、黃色信號線為S+，棕色信號線為S-。
在例程中使用的HART儀表為兩線制，此時需要短接10，11。如果為四線制則不需要，具體接線請參考模板手冊。

圖5

2.3 硬件組態(tài)步驟：

a. 使用Step7 v5.4 創(chuàng)建300主站項目，在硬件組態(tài)窗口依訂貨號添加背板、電源、CPU、343-1模塊。參見下圖：

圖6

b. 雙擊DP接口，添加DP網(wǎng)絡(luò)并定義網(wǎng)絡(luò)參數(shù)。參見下圖：

圖7

c. 添加訂貨號為6ES7153-2BA02-0AB0的DP從站，并定義地址為8。參見下圖：

圖8

d. 在8號從站插槽中中添加訂貨號為6ES7331-7TF01-0AB0的HART模擬量模板，并在通道4.0添加一個現(xiàn)場設(shè)備。參見下圖：

圖9

地址分配列表：例程使用了4.0通道，即PIW272

	4.0	4.1	4.2	4.3	4.4	4.5	4.6	4.7
PIW	272	274	276	278	280	282	284	286

表3

e. 雙擊HART模擬量模板，在Inputs標簽頁定義傳感器類型。參見下圖配置：

圖10

f. 在HART variables標簽頁定義HART變量，例程使用了前4個HART變量。

HART變量分配列表：
Variable 1為通道0的PV值，地址為PID288
Variable 2為通道0的SV值，地址為PID293
Variable 3為通道0的TV值，地址為PID298
Variable 4為通道0的QV值，地址為PID303
參見下圖配置：

圖11

g. 至此，組態(tài)完成，編譯保存并退出硬件組態(tài)界面。
h. 在程序塊中添加OB82、OB86、OB122冗錯塊。參見下圖：

圖12

i. 在程序塊中添加變量表，并添加通道地址以及HART變量地址。參見下圖：

圖13

j. 至此，保存項目并下載至CPU。

2.4 測試
打開變量表，在線監(jiān)控通道模擬量值(通道電流值)以及HART變量實際值。請參看下圖：

1. TDC IE communication introduction

TDC system is the newest digital control system of SIMADYN D family and it has the highest quality in the SIMATIC control system family.

As one part of TIA family it has powerful communication function. The system provides the MPI communication protocol, Profibus communication protocol, Ethernet communication protocol. It is easy to communicate with other simatic product, for example S7-300, S7-400, HMI and drives product.

For Ethernet communication, the hardware platform is CP51M1 which supply a standard RJ45 Ethernet interface; the old interface CP5100 is discontinued as per Aug. 1 2005.

For communication task, system can exchange process data with other TDC system or PLC S7 system through CP51M1 module.

For communication protocol, TDC system supplies TCP/IP protocol and/or UDP protocol.

For transfer modes, refresh mode, handshake mode, multiple mode and select mode are available for selection.

For net speed it can work with 10Mbit and 100Mbit network, the module can automatically sense the net speed.

2. TDC configuration steps

2.1 Hardware configuration in SIMATIC Manager

2.1.1 Create a new S7 project

2.1.2 Insert a TDC station

2.1.3 Select hardware configuration in SIMATIC Manager, double click to open it

2.1.4 Insert the subrack, CPU, communication board CP51M1 and other module from the hardware catalog
Keep the same type with which is used in the sub rack.

2.1.5 Define the CPU module and communication module properties

For CP51M1, we need to define the module name firstly

For Ethernet property we need to define the IP address and subnet mask

2.1.6 Save and compiled the hardware configuration

2.2 CFC programming

2.2.1 Insert a CFC program in SIMATIC Manager, double click it to open it

2.2.2 Insert the TCPIP communication block into the chart, define the connection address which is set in the hardware configuration and select the proper cycle time

2.2.3 Insert the send function block CTV_P, define the connection:

2.2.4 Insert the DWR_D block to write the communication content to the communication buffer

Here we can define the offset in the communication buffer by set connector1/2. The final result is the sum of offset1 and offset2.

For connector SWP we set it to 1 if it communicates with a PLC.

The data we try to send is set in connector X, here is 44 as an example.

For receive part, we can do it in the same way.

For connector AR of CRV_P, we do not need to define the partner IP address–partner port number.

2.2.5 Compiled the program and download it to the memory card and restart the system

3. S7-400 configuration steps

3.1 S7 hardware configuration

First insert the S7-400 station, and then open the hardware configuration to insert the modules which are available on the sub rack.

For CP443-1 module we need to define the IP address and subnet mask.
The IP address will be used in the CFC program.

3.2 network configuration in the Netpro software
Open Netpro under hardware configuration menu

Select the CPU in the SIMATIC station and insert a new connection,
Select unspecified station and
TCP connection, press apply button.

Select the ID number, record the address LADDR.
Both of them will be used in the S7 program.

Under address menu we need to set the local port number, partner address and port number, press OK button to confirm the setting.

For other connection you need, you can do it in the same way.

Then we need to save and compile the configuration.

We need to download not only the hardware configuration, but also the Netpro configuration to the CPU.

3.3 Programming in the S7 CPU

For the industrial Ethernet communication we use the FC5 AG_SEND, FC6 AG_RECV block.

These blocks transfer and receive the data on the configured TCP connection to and from the Ethernet CP.

Here we made two FC separately for send and receive function, one is FC 30 for FC5, and another is FC31 for FC6.

For FC5, we need to define:

For error evaluate we can check the connector Error and Status. For the status code we can get detail information in the FC5 description documentation.

For FC6, we can do it in the same way.

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