ProSoft Technology 5201-DFNT-104S - Manual (Page 127)

Reference 104S v2 ♦ ProLinx Gateway
Protocol Manual (Firmware v2.xx)
ProSoft Technology, Inc.
Page 127 of 157
March 19, 2010
5.6 Parameter Qualifiers
Type of Parameter Description
0 Not used.
1 Threshold value (deadband). This parameter is used as the value of
variation from the last reported event value to generate events. Each
measured value has a user-assigned deadband value. The low and high
limit parameter values are computed using the value entered for each
measure data point. This parameter can be set and read by the controlling
device (client).
2 Smoothing factor (filtered time constant) - NOT SUPPORTED
3 Low limit for transmission of metered values. This value is used as the lower
limit for event generation. The value of this parameter is determined based
on the value of the last reported event and the deadband set for the specific
point. This parameter can be read by the controlling device (client).
4 High limit for transmission of measured values. This value is used as the
upper limit for event generation. The value of this parameter is set based on
the value of the last reported event and the deadband for the specific point.
This parameter can be read by the controlling device (client).
5 to 31 Reserved for standard definitions of standard - NOT SUPPORTED
32 to 63 Reserved for special use - NOT SUPPORTED.
5.7 IEC 60870-5-104 Server Interoperability Document
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.
Note: In addition, 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.
The selected parameters should be marked in the white boxes as follows:
Function or ASDU is not used
⌧ Function or ASDU is used as standardized (default)
R Function or ASDU is used in reverse mode
B Function or ASDU is used in standard and reverse mode
The possible selection (blank, X, R, B) is specified for each specific clause or
parameter.