How to configure Modbus tcp/ip data in M580

[MrBong]

How to read data from modbus tcp/ip in M580. I tried ADDM & ADDMX and Read_var but not getting data.

Please guide further.

[YONGHO-KIM]

Are you trying to do Modbus TCP/IP communication with the M580 CPU or are you trying to communicate through BMENOC?

[MrBong]

@YONGHO-KIM I am trying to do Modbus TCP/IP communication with M580 CPU.

[YONGHO-KIM]

1.Change FFB Type
AS-IS : ADDMX
TO-BE : ADDM

2. Accoding to the information you set, SLAVE is as follows.
Please check if the information is correct.
1) IP : 192.168.0.120
2) Slave ID : 14
3) Holding register

[MrBong]

@YONGHO-KIM I have tried with ADDM also but no result. I have 16 device in loop.

[RoozeeR]

In addition to the previous:

1: Set the timeout value (GEST parameter 3rd word) to a value other then 0 (=infinite) example 20;

2: Do this for all GEST parameters of alle communication functions;

3: INIT and (re)start the CPU

4: Check GEST parameter 2nd word for any errors (see control expert help on READ_VAR)

[YONGHO-KIM]

Please refer to the attached files.

[Sophearak]

Hi,

For ADDM we will use IP for modbus TCP not IP of CPU ?

[YONGHO-KIM]

- Do not enter the CPU's IP.
- Enter the IP of the device you want to communicate with.

[Sophearak]

Dear ,

I am new for modbus TCP with M580 I have a few question as below:

1. For M580 CPU will work with ADDM or ADDMX?

2. How to create string for input ADDM or ADDMX for CPU 580?

3. In order to read data Modbus TCP we must to do both DTM and function block READ_VAR? 

Thanks.

[YONGHO-KIM]

1. Use ADDM.
2. Please refer to the attached file
ex) ADDM('{192.168.1.40}TCP.MBS')
3. Yes

[Bosswaffle]

3. Would be a no. You do not need to use a DTM and READ_VAR at the same time. Either will work by themselves, and it would probably work better to only use one at a time.

[Sophearak]

Dear 

I has follow the step and I do not received any data from power meter. Can you me to check ? because I still can not found the mistake for reading modbus TCP.

      

[YONGHO-KIM]

Please upload the PLC project file, and I will review it.

[Sophearak]

Dear ,

I will use NOC for reading modbus TCO of power meter brand lovato.

Thanks 

[YONGHO-KIM]

What is the password?

[Sophearak]

PW:Ats!@#123

[YONGHO-KIM]

After reviewing the attached file, please proceed with testing. Once the testing is completed, kindly share the results.

[Sophearak]

Dear ,

Thanks for your support now it work.

[Simplicio]

Hello! Can I poll modbus rtu over tcp (moxa nport) data in the M580? Nport is running in TCP server mode. I am interested in the format of the addm or addmx string.

[YONGHO-KIM]

If the nport is a Modbus tcp server, the m580 supports Modbus tcp clients, allowing communication.

Please refer to the attached file for addm and addmx information.

[Simplicio]

If I use plcsim, what channel number should I specify in addm?

 

 

[YONGHO-KIM]

Please try as below.

[Adib]

Hi I would like to ask for the power meter how do you decide the slave ID as 1? doesnt modbus tcp does not require slave id

[YONGHO-KIM]

The ID setting of Slave is also required in modbus tcp.
Below is an example of when the slave id is number 2 in modbus tcp.

If the M580 is the master of Modbus tcp and you want to send a signal to slave device 2, set the yellow marking to 2 and test it.