Truyền thông giữa S7 300 và S7 200 qua EM 277

I.Configuration Simatic Manager.

1.   To open Simatic Manager, select File > “New” project, Insert Name is following box. Then click OK. 

2. Right Click on “S7 300 Connect Em277” at  the above left corner of Simatic Manager. Please insert the following picture :

3.   Click Hardware to open “HW Config” :

Ø At the right side of “HW config” click SIMATIC 300 > RACK-300 to insert Rail :

Ø Please insert PS 307 10A (Power Supply). At CPU 314C – 2DP and choosing serial of CPU 314C – 2DP exactly. Seeing the following picture :

Ø The box “ Properties – PROFIBUS interface DP (R0/S2.1) ” show to choose profibus networked. Please click “ New ” :

Ø At Tab “ Network Setting ” to select the paramater as the above pictrure. Then click “OK”.

Notice: The DI/DO address of CPU 314 is important to program PLC input and PLC output exactly.

Ø At tab Address of box  “ Properties – DI24/DO16 (R0/S2.2) ” please insert Address input and ouput with  “ Start – End ”. Then Click Ok. In the sample “Input start : 0; Input start : 2” are correlative “I0.0 – I2.7” . “Output start : 0 ; Output end : 1” are correlative “Q0.0 – Q1.7” . 

Ø To connect S7 200 through EM 277 Module profibus DP, Click line “PROFIBUS (1) DP master system (1)” then select EM 277 PROFIBUS – DP at The tree folder PROFIBUS DP. 

Notice: if your HW Config don’t have EM 277 Profibus device in library. Please search GSD file for EM 277 at Website http://support.automaitons.siemens.com .

 Note: Address of EM 277 must be selected as following.

-          Turn Off power supply’s EM 277

-          Select :  “ x10 ” address  at zero. “ x1 ” address at 4. Then address of EM 277 is four (4).

-          Turn On power supply’s EM 277

  

Ø Then click EM277 on line profibus and select “ 2Byte Out / 2 Byte in ” to define data type transfer.

-    Input memory master is “I Memory” to receive data from One defined Slave.

-    Onput memory master is “O Memory” to send data from Master to the defined Slaves.

Example: signal 2byte in of master is IB3/IB4 and signal 2 byte out of master is QB2/QB3.

Ø Specify “ I/O Offset in the V – Memory ”.  The default is zero (0).

Ø To finish click button “ Save and complile ”. Then download Hardware to PLC.

II.       Writing program PLC

1.      PLC S7 300:

Ø  Send signal from S7 300 to S7 200 through Module EM 277

Ø  Receive signal from S7 200 to S7 300 through Module EM277.

Please open HW Config to specify address of S7 300, EM277 exactly.

2.      PLC S7 200:

Ø  Receive signal forum s7 300 transfer to S7 200 through EM277 Module. 

Ø  Send signal from S7 200 to S7 300 through EM 277 Module

Notice: Input and output address of S7 300 and S7 200 belong in “HW Config” 

Please watch the following picture to see clearly.