Modbus TCP Communication between Freelance 2013 AC700F and SM500F

Hi.
I want to receive data from a ABB SM500F (paperless recorder).
It is no problem to set ip adress, but I can‘t set a modbus adress in SM500F because there is no input field for that.
In FBD function blocks I have to quote a modbus adress.
Many years ago I established another modbus tcp communication to a third-party device that works fine.
Kind regards

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Achim Briss Rank: 2330

Asked 2 months ago

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Greetings,

AFAIK if you set IP Address for Modbus TCP Slave device, you dont need any other address decleration.
Maybe you need to use "Uniqe ID" for TCP slave devices, you can use "255" if you dont know exact ID of device.
For your FBD block, is it used for Modbus Serial or TCP? You have to be sure first.

Hope it helps you.

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by Achim Briss Rank: 2330 on 9/11/2018 12:06:31 PM | Like (0) | Report

Thx for answering.
I set "255" in MODM_R8R for slave-adress.
In HWSYS there is a MODTCP_M with the slave IP adress.
In commissioning mode the diagnostic values are:
Active connection 0
Transmit count 0
Receive count 0
Invalid frames 0
Timeouts 0
Connection aborts 3837 (counting up 1 per second)
Status 6
What do you mean with 'For your FBD block, is it used for Modbus Serial or TCP? You have to be sure first.'
The FBD blocks are the same for serial and tcp. The connected interface in HWSYS ist MODM_DEV (serial) or MODTCP_M (tcp). Am I right?
For the established connection with an other Modbus TCP device I also use MODTCP_M in HWSYS and in FBD MODM_R1R. In MODM_R1R is the right slave adress (35) set.

by Dieter Henkel AKS expert

Rank: 13 on 9/12/2018 5:46:19 AM | Like (0) | Report

Did you check which TCP Port address the SM500F uses for communication and configure it in the Master device function block parameters?

by Achim Briss Rank: 2330 on 9/12/2018 11:10:38 AM | Like (0) | Report

Both use TCP-Port 502.
If 'Slow down send cycle' is set, the transmit count is permanent 0.
If it isn't set, transmit counts 1 up every 10s.

by Achim Briss Rank: 2330 on 9/12/2018 1:28:01 PM | Like (0) | Report

The subnet mask on SM500F wasn't 255.255.240.0!
Now the connection is active! In HWSYS everything is fine.
In FBD the MODM_R8R Pin ERR:TRUE and STA:256.
I can't find the description for STA:256.
No value is transmitted.

by Dieter Henkel AKS expert

Rank: 13 on 9/13/2018 1:00:27 AM | Like (0) | Report

Error 256 means "Illegal function"

by Achim Briss Rank: 2330 on 9/13/2018 11:01:00 AM | Like (0) | Report

Is there a list with all errors in any documentation?

by Dieter Henkel AKS expert

Rank: 13 on 9/14/2018 12:56:56 AM | Like (0) | Report

The engineering manual Communication and Fieldbusses in section 4, Modbus Master function blocks, on page 336, 337 contains a list of Modbus related error codes.

by Achim Briss Rank: 2330 on 9/14/2018 2:22:54 AM | Like (0) | Report

Thanks a lot

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Titus

Rank: 8

Answered 2 months ago

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Modbus TCP Communication between Freelance 2013 AC700F and SM500F

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