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Split from MODBUS_MASTER and MODBUS_COMM_LOAD difference between initialization and execution.

Hello 일월풍운,

at first welcome to the forum.

English is the official language in the Siemens International Forum. Please be so kind and write your posts in English. Not everyone in the forum speaks Korean. If you don't speak English, then use translators like Google Translate.

일월풍운

나는 t7 v3에서 s7-300을 사용하려고합니다.

저는 cp-341을 사용하여 modbus_master를 사용하여 타기와 통신합니다.

가능한지 여부를 알려주세요.

예를 얻을 수 있습니까?

고맙습니다.

Google Translate

I am going to use s7-300 on t7 v3.
I use the cp-341 to communicate with the ride using modbus_master.
Please let me know if it's possible.
Can I get an example?
thank you.

Hello  Lunar Weather;

There are many discussions and examples available on the forum for a CP 341 programmed as Modbus Master. The function you are referring to unfortunately applies only to S7-1200 and S7-1500 CPUs, not for S7-300 with a CP 341. You must use the functions designed especially for the S7-300/400 CPs as Modbus master (as shown in the following example.).

In order to provide more information to you, we must know more details of the programming software you plan to use. Here is an application example for TIA Portal:

;Sample program MODBUS Master (standard block) zXX21_04_PtP_Com_MODMA.zip for STEP 7 (TIA Portal)

https://support.industry.siemens.com/cs/ww/en/view/99742134

Hope this helps,

Daniel Chartier

Hello

Look here at chapter 57:

https://support.industry.siemens.com/cs/ww/en/view/78028908

Bye Murof