PAC3200 TCP/IP vs Kepware

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

Best answer by pshashipreetham

Hi,

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).
Data Type: Set the data type as Float (32-bit). The energy values are typically stored in IEEE-754 format.
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.
Alternate Addresses: If 40093 doesn’t give correct data, try:
- 40091
- 40092
- 40094
  Always test them as Float with and without word swap.
Modbus Scanner: Use a tool like ModScan32 or QModMaster to read registers directly and verify correct values outside of KEPServerEX.
Manual Confirmation: Download the Siemens PAC3200 Modbus register map (PDF) from Siemens' official site. That document confirms exact addresses for energy-related values.
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,

Answer

18-Opal

Hi,

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).
Data Type: Set the data type as Float (32-bit). The energy values are typically stored in IEEE-754 format.
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.
Alternate Addresses: If 40093 doesn’t give correct data, try:
- 40091
- 40092
- 40094
  Always test them as Float with and without word swap.
Modbus Scanner: Use a tool like ModScan32 or QModMaster to read registers directly and verify correct values outside of KEPServerEX.
Manual Confirmation: Download the Siemens PAC3200 Modbus register map (PDF) from Siemens' official site. That document confirms exact addresses for energy-related values.
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,

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