Appendix 1Interoperability list for IEC104 Slave OPC ClientNot supportedSupportedSupported, may need additional engineeringThis companion standard presents sets of parameters and alternatives from which subsetsmust be selected to implement particular telecontrol systems. Certain parameter values,such as the choice of “structured“ or “unstructured“ fields of the Information ObjectAddress (IOA) of ASDUs represent mutually exclusive alternatives. This means thatonly one value of the defined parameters is admitted per system. Other parameters, suchas the listed set of different process information types in command and in monitor direc-tion allow the specification of the complete set or subsets, as appropriate for the applic-ations. This clause summarizes the parameters of the previous clauses to facilitate asuitable selection for a specific application. If a system is composed of equipmentstemming from different manufacturers, it is necessary that all partners agree on theselected parameters.The interoperability list is defined as in the IEC 60870-5-104 protocol and extended withparameters used in this standard. The text descriptions of parameters which are notapplicable to this companion standard are struck out (the corresponding check box ismarked black).The full specification of a system requires individual selectionof certain parameters for certain parts of the system, forexample individual selection of scaling factors for individuallyaddressable measured values.Application layer telegram formatsFunction or ASDU is not usedFunction or ASDU is used as standardized (default)Function or ASDU is used in reverse modeFunction or ASDU is used in standard and reverse modeFunction or ASDU may need some additional application level work63COM600 series 5.01MRS758692Slave Protocols (Ethernet) and Applications Technical Refer-ence Manual