4 IEC 60870-5-104 interoperability
4.1 Overview
This companion standard presents sets of parameters and alternatives from which
subsets have to be selected to implement particular telecontrol systems. Certain
parameter values, such as the number of octets in the COMMON ADDRESS of ASDUs
represent mutually exclusive alternatives. This means that only one value of the
defined parameters is admitted per system. Other parameters, such as the listed
set of different process information in command and in monitor direction allow the
specification of the complete set or subsets, as appropriate for given applications.
This Clause summarizes the parameters of the previous Clauses to facilitate a
suitable selection for a specific application. If a system is composed of equipment
stemming from different manufacturers it is necessary that all partners agree on
the selected parameters.
The selected parameters should be marked in the white boxes.
Function or ASDU is not used
Function or ASDU is used as standardized (default)
Function or ASDU is used in reverse mode
Function or ASDU is used in standard and reverse mode
The possible selection (blank, X, R, or B) is specified for each specific clause or
parameter.
The full specification of a system may require individual selection of
certain parameters for certain parts of the system, such as the individual
selection of scaling factors for individually addressable measured values.
4.2 System or device
(System-specific parameter, indicate the station's function by marking one of the
following with “X”.)
System definition
Controlling station definition (client)
Controlled station definition (server)
2NGA001859 A IEC 60870-5-104 interoperability
REX615
IEC 60870-5-104 Communication Protocol Manual
35
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