Memory Area & Register Address example

[amacierzynski]

Hello!

Just wanted to use your library as a part of my project. Great work btw!

One question is that I simply have no idea how to use it with PLC. I am not PLC guy at all, just Java Programmer.

For example I have three addresses: D01194, H0003.03 & CIO1003.10

As I understood you are sending this as a part of msg frame.
Now in the FinsConnection class I have readRegister methods:

public int readRegister(int memoryArea, int registerAddress, int bits)
&
public int readRegister(int memoryArea, int registerAddress)

From the PLC doc, I found that D, H or CIO are PC Communication Areas. It is memoryArea in the lib?
Should I convert those to HEX, so for example:

D -> 0x000044
H -> 0x000068
CIO -> 0x63696f ?

Then I assume that number is just a register with a spcific bit after dot, right?

Would be great to have simple explanation!

Best Regards,
Adam

[amacierzynski]

Or maybe there is a list of predifined hex's for those codes. I think I found this:
https://paginas.fe.up.pt/~pfs/recursos/plcs/omron/cs1/com_manual/sec52.pdf

On 3rd page there is a list of Memory Areas, so I think this is what I was looking for.

Let me know if I am correct.

[koszoaron]

I think the manual you linked has the right definitions for the memory areas. It was a while ago when I worked on this project, but from this file https://github.com/koszoaron/bsc_thesis/blob/master/maguScada/src/com/github/koszoaron/maguscada/communication/PlcConnection.java it's clear that CIO is 0x30 which matches the description from the manual you linked.
The original implementation was done by reverse-engineering the communication between the PLC and an Omron utility called Multiway, that's why there are only two areas defined in the file above, which are the ones that were needed for my project.

[amacierzynski]

Thank you for your response.
So do you think that communication between PLC & standard PC can be different than in your example?
I was able to ping & connect to the PLC using your lib, but the response is always -1 (for booleans & int/words as well).

I will add logger inside your code and try to debug it a little bit.

[amacierzynski]

The problem is that streamFromServer is always not available.
Do I really need to wait 1 sec to read data from this stream?

[Tofax]

The problem is that streamFromServer is always not available. Do I really need to wait 1 sec to read data from this stream?

Were you able to fix this?