MODBUS Data

[Abdul03]

Hi Friends,

I have a MODBUS device which is responsible to carry data to one of the SCADA system. The problem what I have is, when the data received by the SCADA it gets round up to the nearest value. Say for example, if the actual value is 5.8 it shows as 6 in the SCADA. I have checked this using modscan as well and the result is same.

I hope somebody might able to help me out, what could be the actual reason for this and what parameters I am missing to configure.

Please suggest.

 

[tragically1969]

Some rounding will always happen, however this can normally be controlled, usually at the SCADA end, you have neglected to tell us what that system is though.

 

[Abdul03]

It's SIEMENS WinCC SCADA. Can u please tell me how can I able to control this at the SCADA end.

Much appreciated !

 

[tragically1969]

I'm afraid i cant as i dont use that platofrm, which is why i asked in the first place.

But you could start by checking data types and scaling at both ends.

 

[mk42]

It's SIEMENS WinCC SCADA. Can u please tell me how can I able to control this at the SCADA end.

Much appreciated !

At the IO field, make sure that the formatting allows for decimals. That's the most common place I see this rounding.