PM5320 Modbus TCP

[wevolt]

We are currently setting up a PowerLogic PM5320 meter and attempting to retrieve real-time meter load data via Modbus TCP. However, despite being connected to the network, the meter does not seem to be responding to Modbus TCP requests, and port 502 does not appear open when scanning the device.

Setup Details:

• Meter Model: PM5320
• Communication Method: Ethernet (Modbus TCP)

IP address has been setup on the local network with stored (static) IP address.

I have also tried to scan with IOn setup and cannot connect to it.

[Jesus_Diaz · Accepted solution]

Hi @wevolt ,

The meter should allow Modbus TCP communications by default. Please ensure that the IP and subnet configurations in both the meter and PC are correct, and that they are within the same subnet. If this does not work, I suggest trying a direct 1-to-1 connection between the PC and the meter by setting the IPs manually within the same network. Also, make sure that there is no firewall blocking this connection.

Additionally, when reading Modbus from a Modbus TCP meter, ensure that you configure the Modbus software to point to the correct meter's IP and set the ID to 255. You might also try a simple Modbus software tool like Modbus Tester and share the results.

Regards,

JD

[wevolt]

we have tried all this and it does not work - is there a setting to enable modbus somewhere? 

[Jesus_Diaz]

Hi @wevolt,

In the PM5320, Modbus TCP is enabled by default and should work as long as the Ethernet IP settings are properly configured.

Are you able to ping the meter in direct communication? Have you tried using a different laptop? You should disable antivirus software, firewalls, and Wi-Fi if needed.

If you continue to have issues connecting to the meter, I would suggest contacting your local support team to discuss the best options for you.

BR,

JD

[Robert_Lee · Accepted solution]

Are you plugged directly into the PM5320 from a laptop (or are they IT switches involved?).  You may need a Ethernet cross over cable if plugged directly into a laptop.  Are the Link LED solid green and Activity (ACT) LED blinking when a cable is plugged into it?

Further tests you can try assuming the above are working is to open a command prompt and attempting to Ping the IP address you've programmed from the front panel.