PAC3200 TCP/IP vs Kepware

[MB_10908610]

Hello developers,

I am trying to read value of energy consumption from PAC3200 connected through TCP/IP.

Could you share with me what is the address for this value, which would be readable?

I will share with you addresses and values which I am getting, but none of them seems correct.

Thank you for your help

[pshashipreetham · Accepted solution]

Hi, 

1. Common Register: For Siemens PAC3200, the total active energy (kWh) is usually at Modbus address 40093. Depending on the Modbus mode, it may also appear as 4092 (zero-based offset).

2. Data Type: Set the data type as Float (32-bit). The energy values are typically stored in IEEE-754 format.

3. Swap Words: In many PAC devices, Modbus registers are stored in two 16-bit words. Enable "Swap Words" in KEPServerEX if values appear to be in the wrong order or reversed.

4. Alternate Addresses: If 40093 doesn’t give correct data, try:

   • 40091

   • 40092

   • 40094
     Always test them as Float with and without word swap.

5. Modbus Scanner: Use a tool like ModScan32 or QModMaster to read registers directly and verify correct values outside of KEPServerEX.

6. Manual Confirmation: Download the Siemens PAC3200 Modbus register map (PDF) from Siemens' official site. That document confirms exact addresses for energy-related values.

7. Example Setup in KEPServerEX:

   • Tag Name: Energy_Total

   • Address: 40093

   • Data Type: Float

   • Swap Words: Enabled (if needed)

   • Scan Rate: 1000 ms (or as needed)

This approach will help you correctly read energy consumption from PAC3200 using Modbus TCP in KEPServerEX.

Thanks,