IEC60870_5_104_MAX_ASDU_LENGTH (Questions)

[serumhyb]

// send information objects
var signalAsdu = new ASDU(parameters, cot, isTest, isNegative, oa, ca, isSequence);

        foreach (var rtuSignal in rtuSignals)
        {
            signalAsdu.AddInformationObject(new MeasuredValueNormalized(rtuSignal.IOA, scaleValue(rtuSignal), new QualityDescriptor()));            
        }

        return signalAsdu;

Please see above code. We have created an ASDU unit and trying to add information objects to the unit. We have around 45 Signals to be embedded into the unit object. But the AddInformationObject will not go over 40 because there is no space left due to max length of IEC60870_5_104_MAX_ASDU_LENGTH =249. Is there anyway to go over this limit or we have to send with 2 ASDU unit?

Thanks a lot in advance.

[mzillgith]

The 249 bytes is a hard limit. If you have more data you have to create additional ASDU.