Convert four registers into float value

[jhonut]

Hi,

I am using a TM221CE24R PLC to read, through Modbus RTU, some energy parameters from PM5100 power meter. My question is how could I convert the values of 4 registers into the value displayed on power meter?

I have tried to do it in PLC, but EcoStruxure Machine Expert-Basic doesn't the possibility of concatenating and converting the four registers into a float value. On this post, @kasmic_mike offered an excel of converting two registers into a float value. Is there an equivalent for reading and converting 4 registers?

[Marian_Pavlik]

PM5xxx register 3204 - Active Energy Delivered (Into Load) is INT64 of Wh. It's not a float.

PM5xxx register 2700 - Active Energy Delivered (Into Load) is FLOAT32 of kWh.

Read 2 registers from PM5xxx Modbus address 2699.

Result need to swapped to %MFxxx variable.

[Bastian_Schmitz]

And to merge the readed values into a float should be explained in this video from LeTomas