Vijeo Designer reading 64bit value

[Jacek_P]

Hello,

I would like to read energy from masterpact circuit breaker.

Value is stored in 64 bit value

Is it a way to read such value ?

Regards

[Mark_Marusich]

Yes, you can. Declare a new variable as type "REAL". You might also have to check the communication driver setting for the Double Word order.

[Marian_Pavlik]

Vijeo Designer math is 32bit based. INT64 is not possible to present at standard way. I see only possibility to write JAVA code it Vijeo Designer script to convert value to kWh or MWh float32. Good demand for AI.

[Marian_Pavlik]

I tested this small script 64bit resolution solution for MasterPacT energy value to be able represent it in Vijeo Designer runtime as MWh real value with 7+3 digits of Float.

Define Variables arINT64_01 as UINT with dimension 4 and rMvalue as REAL value.

//run this script periodically

int[] uiINT64 = { 0, 0, 0, 0 };
float[] rINT64 = { 0, 0, 0, 0 };
float rMINT64;

//get data to script
uiINT64[0] = arINT64_01[0].getIntValue();
uiINT64[1] = arINT64_01[1].getIntValue();
uiINT64[2] = arINT64_01[2].getIntValue();
uiINT64[3] = arINT64_01[3].getIntValue();
//convert double types to float and rescale to MEGA x1 000 000 * 2^16 by WORD
rINT64[0] = (((float)uiINT64[0])/1000000);
rINT64[1] = (((float)uiINT64[1])/1000000)*65536;
rINT64[2] = (((float)uiINT64[2])/1000000)*65536*65536;
rINT64[3] = (((float)uiINT64[3])/1000000)*65536*65536*65536;
//Max value of MWh if 6000A =4MW*30years=1 092 439MWh = 0xFE 5A71 9126 Wh
//rINT64[2] max = 254
//rINT64[3] max = 0

rMINT64 = rINT64[3]+rINT64[2]+rINT64[1]+rINT64[0];

rMvalue.write(rMINT64);

[GeoffChisholm]

Another idea, you could just examine the bottom 32 bits and treat it as a UDINT. The value will roll over more often (but a Udint is still a long time between rollovers)