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User Manual
R8563G
KITZ 204
Page 27/107
In IEC2 mode, VDEW fixed messages will be created. Also, every Courier event will
be converted to an IEC60870-5-103 generic event message. This results in two
different event messages, but providing the same information, being created
wherever the Courier event causes a VDEW fixed message.
In IEC3 mode, no VDEW fixed messages will be created. A generic event message
only will be created for each Courier event.
If the Alarm bit of the Courier status byte is set in any relay, a VDEW “Group alarm”
(Information Number (INF) 47) is created for that relay.
All VDEW/IEC60870-5-103 messages will be time tagged with an IEC60870 time tag
(1 millisecond resolution).
After it has been initially reported (either as spontaneous information (COT=1) or in
a GI response (COT=9)), only Class 1 data which has changed state is reported. This
means, for example, that once all auxiliary inputs have been previously reported,
then if auxiliary input 1 changes state to ON, INF 27 "Auxiliary input 1" is reported as
ON (DPI=2), but INF 28, 29 and 30 (Auxiliary inputs 2, 3 and 4) are not reported as
OFF.
The KITZ204 responds to a "General Interrogation" (GI) request (ASDU7) and
subsequent "Poll Class 1" request, at any time, with specific Class 1 data, which will
have a "Cause of Transmission" = “General Interrogation” (COT=9). The Class 1
data returned is VDEW Information Numbers 27 "Auxiliary input 1", 28 "Auxiliary
input 2", 29 "Auxiliary input 3", 30 "Auxiliary input 4", 23 "Characteristic 1", 24
"Characteristic 2", 25 "Characteristic 3", 26 "Characteristic 4", 47 "Group alarm" and
84 "General start", or a subset thereof depending on the relay type.
9.5
Measurands
The measurands which are available for extraction by a VDEW/IEC60870-5-103
(Port 1/2) master, using Class 2 data retrieval, depend on the relay type and are
detailed in Sections 9.6 to 9.14 below.
The KITZ204 automatically polls the relevant measurement values from connected
relays, in order to regularly make updated measurands available to the
VDEW/IEC60870-5-103 master. Where a specific measurement value is not
available to be returned in the measurand message, that value will be set to Overflow
(with “OV” bit set), as defined in Section 7.2.6.8 of the IEC60870-5-103 Companion
Standard (Reference 1).
The frequency with which the KITZ204 polls the measurement values from connected
relays can be set separately for each connected relay, in the KITZ204 “Devx Timer”
Courier database cell (in the MEASUREMENTS column). The minimum frequency is
every 10 seconds.
NOTE:
A value of zero (“Devx Timer”=0) means that KITZ204 polling of
measurement values is disabled, and so there will be no data in
response to a Class 2 poll from the VDEW/IEC60870-5-103
master.
For compatibility with VDEW, the measurands are referenced to a Rated Value of
voltage, current, power, VAr and frequency. These rated values must be entered into
the KITZ204 Courier database separately for each connected relay, in the
MEASUREMENTS column.
The maximum value of each of the measurands can be selected to be either “±1.2 x
Rated Value” or “±2.4 x Rated Value” separately for each connected relay, in the
“Devx Value” database cell (in the MEASUREMENTS column).