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GE Multilin
M60 Motor Protection System
D-1
APPENDIX D
D.1 IEC 60870-5-103
D
APPENDIX D IEC 60870-5-103 COMMUNICATIONSD.1IEC 60870-5-103
D.1.1 OVERVIEW
IEC 60870-5-103 is defined as a companion standard for the informative element of the protection equipment. IEC 60870-
5-103 defines communication for a serial, unbalanced link only. Communication speeds are defined as either 9600 or
19200 baud.
This manual assumes basic knowledge of the IEC 60870-5-103 protocol and the standard IEC 60870 documents relating to
the protocol.
Standard IEC 60870 documents relating to IEC 60870-5-103:
•
IEC 60870-5-1 Transmission frame formats
•
IEC 60870-5-2 Link transmission procedures
•
IEC 60870-5-3 General structure of application data
•
IEC 60870-5-4 Definition and coding of application information elements
•
IEC 60870-5-5 Basic application functions
•
IEC 60870-5-6 Conformance testing guidelines
An IEC 60870-5-103 device is required to provide an interoperability table. Interoperability means that any required applica-
tion data in the device, which can be coded into an IEC 60870-5-103 data type, can be mapped into the IEC 60870-5-103
address space. This data is recognized by any IEC 60870-5-103 master.
D.1.2 FACTOR AND OFFSET CALCULATION TO TRANSMIT MEASURAND
The general formula for the transmitted value is Xt = a * X + b
where X is the measurand, a is the multiplication factor, b is the offset and Xt is the value transmitted.
The conditions for determining a and b, when the values exceed the range are:
4096 = a*Xmax + b (Xmax is the maximum value for the measurand)
-4095 =a*Xmin + b (Xmin is the minimum value for the measurand)
By solving the above system of equations for a and b, we find that:
a = 8191 / (Xmax - Xmin)
b = -4096 * (Xmax + Xmin) / (Xmax - Xmin)
So
Xt = 8191/(Xmax - Xmin)) * X - 4096 * (Xmax + Xmin) / (Xmax - Xmin)
We may further simplify the above formula for situations where:
1)
Xmin = -Xmax (positive and negative values) :
Xt = (8191/2*Xmax) * X
a = 4096/Xmax
b = 0
2)
If Xmin = 0 (only positive values)
Xt = (8191/Xmax) * X - 4096
a = 2 * 4096/Xmax
b = -4096
To calculate Xmax, one needs to know the rated value for the specific type of measurand.
Xmax = 2.4 * Xrated
Содержание M60 UR Series
Страница 10: ...x M60 Motor Protection System GE Multilin TABLE OF CONTENTS ...
Страница 98: ...3 40 M60 Motor Protection System GE Multilin 3 3 DIRECT INPUT OUTPUT COMMUNICATIONS 3 HARDWARE 3 ...
Страница 128: ...4 30 M60 Motor Protection System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 238: ...5 110 M60 Motor Protection System GE Multilin 5 4 SYSTEM SETUP 5 SETTINGS 5 Figure 5 29 DISCONNECT SWITCH SCHEME LOGIC ...
Страница 410: ...5 282 M60 Motor Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 413: ...GE Multilin M60 Motor Protection System 6 3 6 ACTUAL VALUES 6 1 OVERVIEW 6 FIRMWARE REVISIONS See page 6 29 ...
Страница 440: ...6 30 M60 Motor Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 452: ...7 12 M60 Motor Protection System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Страница 462: ...9 8 M60 Motor Protection System GE Multilin 9 2 BATTERIES 9 MAINTENANCE 9 ...
Страница 474: ...A 12 M60 Motor Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 584: ...B 110 M60 Motor Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 614: ...C 30 M60 Motor Protection System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 630: ...E 10 M60 Motor Protection System GE Multilin E 1 IEC 60870 5 104 PROTOCOL APPENDIX E E ...
Страница 642: ...F 12 M60 Motor Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Страница 644: ...G 2 M60 Motor Protection System GE Multilin G 1 RADIUS SERVER CONFIGURATION APPENDIX G G ...
Страница 652: ...H 8 M60 Motor Protection System GE Multilin H 3 WARRANTY APPENDIX H H ...
Страница 662: ...x M60 Motor Protection System GE Multilin INDEX ...