18.6 IEC 60870-5-103 communication protocol18.6.1 IntroductionIEC 60870-5-103 communication protocol is mainly used when a protection IEDcommunicates with a third party control or monitoring system. This system must havesoftware that can interpret the IEC 60870-5-103 communication messages.18.6.2 Measurands for IEC 60870-5-103 I103MEAS18.6.2.1 Functionality103MEAS is a function block that reports all valid measuring types depending onconnected signals.The set of connected input will control which ASDUs (Application Service DataUnits) are generated.• 9 Will be generated if at least IL1 is connected. IL2, IL3, UL1, UL2, UL3, P, Q,F are optional but there can be no holes.• 3.4 Will be generated if IN and UN are present.• 3.3 Will be generated if IL2, Ul1L2, P and Q present.• 3.2 Will be generated if IL2, UL1L2 and P or Q missing.• 3.1 Will be generated if IL2 present and IL1 missing (otherwise IL2 in 9).Description for I103MEAS function block:9 = IL13.4 = IN AND UN3.3 = IL2 AND UL1L2 AND P AND Q3.2 = IL2 AND UL1L2 AND NOT 3.33.1 = IL2 AND NOT (3.2 OR 3.3 OR 9)18.6.2.2 IdentificationFunction description Function blocknameIEC 60617identificationANSI/IEEE C37.2device numberMeasurands for IEC 60870-5-103 I103MEAS - -Section 18 1MRK502052-UEN BStation communication1030Technical manual
