I am using a Ge 90-30 PLC for reading voltage, current, watthour, etc. from a energy meter using RS 485. I am able to read voltage and current properly but watthour is not coming properly. It seems watthour is in ASCII format. How can I solve this problem?

 

What is the brand of the energy meter? What protocol is being used? Have you checked the manual to see that the information is ASCII? etc.

If the voltage and current are fine then you probably have a format issue with the watthour. You've got lots of options. Start with double int and float. Regardless, the best thing to do is check the manual for the proper format. If the other data isn't ASCII I seriously doubt that the watthour data is.

Good Luck,

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