appropriate. ex: pulse-On, on-time=100, off-time=300, count=5 would give 5 positive100 ms pulses, 300 ms apart.There is a BLOCK input signal, which will disable the operation of the function, in thesame way the setting Operation: On/Off does. That means that, upon activation of theBLOCK input, all 32 CMDBITxx outputs will be set to 0. The BLOCK acts like anoverriding, the function still receives data from the DNP3 master. Upon deactivationof BLOCK, all the 32 CMDBITxx outputs will be set by the DNP3 master again,momentarily. For AUTOBITS , the PSTO input determines the operator place. Thecommand can be written to the block while in “Remote”. If PSTO is in “Local” thenno change is applied to the outputs.For description of the DNP3 protocol implementation, refer to DNP3 communicationprotocol manual.12.9 Function commands for IEC 60870-5-103 I103CMD12.9.1 FunctionalityI103CMD is a command function block in control direction with pre-defined outputsignals. The signals are in steady state, not pulsed, and stored in the IED in case ofrestart.12.9.2 Function blockIEC10000282-1-en.vsdI103CMDBLOCK 16-AR17-DIFF18-PROTIEC10000282 V1 ENFigure 208: I103CMD function block12.9.3 SignalsTable 278:I103CMD Input signalsName Type Default DescriptionBLOCK BOOLEAN 0 Block of commandsTable 279:I103CMD Output signalsName Type Description16-AR BOOLEAN Information number 16, off/on of autorecloser17-DIFF BOOLEAN Information number 17, block of differentialprotection18-PROT BOOLEAN Information number 18, block of protectionSection 12 1MRK 502 048-UEN AControl426Technical manual