Vision 280 and zenon SCADA communication

[Milos]

Hello all,

 

I have question related to connecting Vision 280 with Modbus TCP zenon SCADA driver. I have experience with other PLC-s but not with Unitronics.

Please find attached config below:

Below you can see zenon driver config and one variable config. I tried to see ML12 from program. Is this the way to directly call adress from SCADA or I missed some step?

sigma is PLC name, PLC IP is in range of PLC.

[Fernando Castro]

On 9/19/2023 at 9:35 AM, Milos said:

Hello all,

 

I have question related to connecting Vision 280 with Modbus TCP zenon SCADA driver. I have experience with other PLC-s but not with Unitronics.

Please find attached config below:

Below you can see zenon driver config and one variable config. I tried to see ML12 from program. Is this the way to directly call adress from SCADA or I missed some step?

sigma is PLC name, PLC IP is in range of PLC.

I believe you are missing socket connection after TCP/IP Card Init (I am not sure if it is required only if you are not using the standarconfig) . and the correct Offset is : 20492, the 5000 in the documentation is an Hexadecimal value, and I have the hunch that zenon uses a decimal value:  5000h = 20480 DEC : 20480 + 12 = 20492.

 

 

 

 

 

[Milos]

Thank you Fernando.

I will check with socket connection. Regarding adressing,  Vision 280 should be basic model so adressess listed in manual should be Decimal, for advanced is Hex. Anyway I will try.

Thank you one more time.

[Fernando Castro]

6 hours ago, Milos said:

Thank you Fernando.

I will check with socket connection. Regarding adressing,  Vision 280 should be basic model so adressess listed in manual should be Decimal, for advanced is Hex. Anyway I will try.

Thank you one more time.

I think you are correct. Also i found another manual online that says ML statrs on 5100, you could try 5112 and see if that works

 

[Milos]

Thank you Fernando,

 

I already tried 5112, 5112, 5113 type Int, Dint but Scada indicate that there is no communication. In the moment my problem is because I dont have comm and with finding the right value I belive will not be problem...

Regards

[sgull]

Did you try to use net address 255 in ZENON instead of 2

[Milos]

Yes

[Joe Tauser]

1.    I don't put any conditions on my SCAN_EX Modbus Slave block - 

 

2.  As Fernando pointed out, your net ID should be 255.

3.  All of the V280's memory is open to read via Modbus.  Rather than fighting to get the right offset for an ML read, try setting your offset to 0 to read MI 0 to establish a baseline that your communication works.   Set your Data Type to INT.  If that doesn't work try offset 1.

4.  Your "Data Block" is set to 0.  Should that be at least 1?

 

Otherwise, upload your program.

 

Joe T.

 

 

[Fernando Castro]

On 9/22/2023 at 3:47 PM, Joe Tauser said:

2.  As Fernando pointed out, your net ID should be 255.

It wasn't me but yeah ID matters for some vendors, although over TCP/IP slave addressing is based on IP and it should be irrelevant.

[Flex727]

1 hour ago, Fernando Castro said:

although over TCP/IP slave addressing is based on IP and it should be irrelevant

Yes. However it will come into play if you have an Ethernet to serial conversion in the communication path. I don't think it's applicable here though.

[Milos]

Thank you all for the advices. After a bit struggle I succeded

For the ID, I put 2 and it was OK, the tricky was for the DWORD bzte order, default is Big-Endian and it should be Little-Endian.

@Fernando Castro thank you for the advice to try with MI, after that I figured out that comm is ok and that I have problem with adressing.