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How to get 100ms+ data for total kW... PF on the 3 generators using Modbus.

When I am at a land oil rig in North America (or Arabia) I would like to get 100ms+ data for total kW, kVA and kWh, PF on the 3 generators using my real-time controller with Modbus.

 

Please correct any assumptions that are wrong and your recommendations, rough guesses are helpful. I understand that over 90% of the NA landrigs use 3512c generators. Do these rigs have EMCP version 3.2 (released ~2004) or higher? I understand before 3.2, kW etc wasn’t broadcasted. Any other way this acquisition is possible? What % of the rigs have this info over Modbus?

 

Thank you. I appreciate your help.