communication between PM571 and CP630 (RS232)

Good Morning,

I'm sorry my English,

I have a problem, e don't know who to communication between PM571 and CP630. I use RS232, but console give me a error.
I tried every protocol or appear "!" Communication error ou "?" data not yet available.

What I am doing wrong.

Please i need help, it's for work and in Portugal ABB don't have support.

Comments (0) New comment

silvialopes.sl Rank: 2502

Asked 4 months ago

Answer this question Follow

Voted best answer

Greetings,

For PM571 PLCs have built-in serial Modbus RTU protocol with RS-485 and RS232
And it is he same for CP630 operator panel.

You can use Modbus RTU protokol, define PLC as slave and Operator Panel as master. You need to define variable under "Global Variable" side and define same tags under Panel Builder software.
If your wiring is correct, there is no reason not to communicate these devices.

Also if you have ethernet ports for both devices, you can use Modbus TCP protocol.

Hope it helps you.

Comments (6) New comment

by silvialopes.sl Rank: 2502 on 11/7/2018 1:39:28 PM | Like (0) | Report

Thanks for the answer and i'm sorry for my ignorance but the program have many Modbus RTU protocol, I use ABB Modbus RTU (selected Pm571) and put the tags from the PLC program in Panel Builder,but don't work, i'm doing something wrong for sure. ;(

How I do this: "(...)define PLC as slave and Operator Panel as master. You need to define variable under "Global Variable" side and define same tags under Panel Builder software". It's my first time with ABB software.

The PM571 installed in client don´t have ETH :P I'm working with another PM571 but it's not the some thing, because i have to adapted the program to test, it's not the same thing and I have very errors in the program PLC.

by ak Rank: 233 on 11/8/2018 3:14:13 AM | Like (0) | Report

Selecting "ABB Modbus RTU" in CP600 defines that panel is acting as master. In PLC Configuration you have to change one COM interface as Modbus type. Then under the Modbus parameters you need to select "Operation Mode" as "Slave". Also you need to give "Address" which has to match CP600 parameter "Node ID" example value 10.

When you say "put the tags from the PLC program in Panel Builder,but don't work" do you mean, that in Codesys you have declared variables with memory address (%M or %R) and these variables are also defined in CP600 Tags section? Example: Codesys side variable declared as: Var1 AT %MW0.0 : INT; in CP600 side Tags list variable address matches to %MW0.0 type short.

When you say "I have very errors in the program PLC" do you mean that the PLC's error led is on all the time but you can download the software and it goes to run mode or do you mean that during compilation you get errors which you can't solve and because of this you can't download the program?

by silvialopes.sl Rank: 2502 on 11/8/2018 6:18:43 AM | Like (0) | Report

I do that, it's ok. I use the PLC Com 2 (RS232 - i will test the cable again), in cp630 it's COM 1 or 2?

No, I mean, when i connect HDMI to PLC it's appear the symbol "!" or "?" in the local of PLC tags.

I mean "PLC's error led is on all the time but you can download the software and it goes to run mode".

by silvialopes.sl Rank: 2502 on 11/8/2018 6:25:53 AM | Like (0) | Report

the "!" on manual is communication error
the "?" on manual is data not yet available (slow comunicattion protocol)
I don't understand what they mean exatly.

by ak Rank: 233 on 11/8/2018 8:58:58 AM | Like (0) | Report

Procedure should be this:
1. In Panel Builder 600 project protocol section, create a plc connection type ABB Modbus RTU with configuration matching your slave device. Use COM1 in panel. Now panel is acting as Modbus master.
2. In Codesys PLC project PLC configuration section (Under Resource tab), modify your COM settings to create Modbus slave port with parameters matching your master bus parameters eg. baud, parity, slave address etc. Now PLC is acting as Modbus slave.
3. In Codesys create variable(s) into PLC program with memory address (%M or %R). Now you have data in slave that master can read/write.
4. In Panel Builder 600 software Tags section, import or create manually variables that match variables created in PLC program. Now the master is reading/writing data from/to slave and returning the value to Tags section variable name.
5. Now you can create elements to panel pages and attach variables to these elements. If you see a symbol "!" or "?" with the element that generally means your bus configuration (Point 1 or 2), variable declaration (Point 3 or 4) or bus wiring is incorrect.

CP600 have internal variable named "Communication status" which might provide some additional information.

by silvialopes.sl Rank: 2502 on 11/8/2018 9:48:09 AM | Like (0) | Report

THANKS! :)
I appreciate the response, it was really very useful, very much. Clarified my doubts all.

I will try a new cable, I think that's it.

if it works i told you and i thanks again :P

Add new comment