A 36
2
IEC 60870-5-102 Protocol
Apart from the SCTM protocol, the protocol according to IEC 60870-5-102
can also be used for data retrieval.
2.1
Telegram processing
•
Transmission settings: 8, E, 1 (1 start bit, 8 data bits, even parity, 1 stop
bit)
•
Only telegrams according to IEC 60870-5-1 format FT 1.2 are supported.
•
Only asymmetrical transmission procedures according to section 5 of IEC
60870-5-2 are applied. The basic polling procedure uses the re-
quest/respond service with function code 11 for data retrieval of class 2.
Data of class 1 is indicated by the ACD bit. Values of the most recent regis-
tration period are assigned to class 2, whereas values from previous regis-
tration periods and all information requested by the polling ASDU are
assigned to class 1.
•
The link address (address field of the link or connection layer) must have 2
bytes ( fixed system parameter)
•
The counter address (the common ASDU address) must have 2 bytes (
and can be identical to the link address).
•
The maximum telegram length is 256 byte.
•
Telegrams with wrong link address, wrong checksum or wrong format are
discarded.
2.2
Date retrieval (Periodic buffers Tm1/MP1 & Tm2/MP2)
You can retrieve current data (from the most recent registration period :=
class 2), data from the oldest registration period and any complete registra-
tion period, data from a selected time period as well as the manufacturer
information.
The following selection was made from the user standard IEC 60870-5-3/4:
•
All values are transferred per buffer either as “Billing data“ or as “„opera-
tional data“ (You can program this using DLXPARA).
•
A maximum of two registration periods (MP1 and MP2) are supported.
•
The register addresses are entered in ascending numerical order (the se-
quence is defined by the device parameters set using DLXPARA: inputs
are entered before totals).
•
Under the heading “periodically reset readings“ either energy increments
(e.g. kWh) or demand values (e.g. kW) will be transferred, depending on
the parameters set with DLXPARA.
Summary of Contents for DLX
Page 9: ...9 1 Scope of Application 1 1 Application environment Figure 1 Application environment...
Page 42: ...42 4 2 Installation diagram Figure 13 Dimensions of mounting points...
Page 54: ...54 7 Menus 7 1 Flow diagram Figure 24 Flow diagram of menus...
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Page 111: ...E116012215052 Appendix A Data Retrieval Protocols...
Page 112: ...A 2...
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Page 157: ...E116012215052 Appendix B Table Addresses...
Page 158: ...B 2...
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Page 171: ...E116012215052 Appendix C List of Parameters and Constants...
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