Hello!
I use omnimeter V4 to collect data from my 4-wire system (3 phase, 230v/50Hz) via RS-485. Everything works fine. Great meter!
I have a question regarding to a Cos Phi data decoding:
Sometimes I receive Cos Phi data as:
HEX:
43 30 37 33 // Cos PHI L1 0.73
20 31 30 30 // Cos PHI L2 1.00
43 30 37 38 // Cos PHI L3 0.78
sometimes as:
HEX:
43 30 39 39 // Cos PHI L1 0.99
20 31 30 30 // Cos PHI L2 1.00
43 30 37 30 // Cos PHI L3 0.70
CRC is ok.
What does the first byte in Cos PHI data means (20 or 43)? Does in this case 43 means “+” in decimal? Is there any other possible values?
Thank you!
Reading Cos Phi data values
Reading Cos Phi data values
Last edited by meter07 on Sun Sep 14, 2014 6:45 am, edited 1 time in total.
Re: Reading Cos Phi data values
Parsing Cos Phi data I have noticed also "4C" as first byte in Cos Phi data, as follows:meter07 wrote: What does the first byte in Cos PHI data means (20 or 43)?
HEX:
4C 30 37 30 // Cos PHI L1 0.70
20 31 30 30 // Cos PHI L2 1.00
43 30 37 38 // Cos PHI L3 0.78
So, possible values are 4C,20,43
Re: Reading Cos Phi data values
I got it
0x4C is for L and 0x43 is for C.
So, the correct readings for the my last case will be
4C 30 37 30 // Cos PHI L1 0.70L
20 31 30 30 // Cos PHI L2 1.00
43 30 37 38 // Cos PHI L3 0.78C
0x4C is for L and 0x43 is for C.
So, the correct readings for the my last case will be
4C 30 37 30 // Cos PHI L1 0.70L
20 31 30 30 // Cos PHI L2 1.00
43 30 37 38 // Cos PHI L3 0.78C