64 bit values in a FX3U

[Bryll 31]

Need to read a couple of values from a ABB B24 energy meter via Modbus RTU. Some of the values occupies 4 registers (4 x 16 bits). Anyone with a good suggestion how to present this on the HMI before I start testing myself ? Working with GX IEC Dev. The HMI is a E1101

[Inntele 60]

Bryll, Once I wrote in this topic, how to represent on HMI screen a value, that is being read from some device via network, depends on representation of the value in datagram. 64-bit format is not informative data to give you a suggestion. The 64-bit may contain BIN, BCD and other data format...

[Bryll 31]

What the energy meter will return as an example, is a reply for accumulated kWh with the size of 4 registers (signed) with the resolution of 0.01kWh. I could discard the two highest registers, but when the unit has been in operation long enough will I need the two upper registers to present a correct value. That will give me 21 474 836,47 kWh as the maximum value if I only use two registers. It might be enough for the first ten years of operation, so I'll go for it

[Inntele 60]

Likely, the recieving data is represented in BCD format (in range 0000000000000000h-9999999999999999h = 00000000000000.00-99999999999999.99 kWh ) Thus to dispay it on HMI screen you should use HEX format. If the value from e-meter is represented in BIN format (while it would be a little bit stange to use BIN), you should convert it into BCD before.