7SG11 Argus 1 Diagrams and Parameters
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P20008 Page 16 of 33
Section 3: IEC 60870-5-103 & Modbus RTU Definitions
3.1
IEC 60870-5-103 Definitions
The following tables give information on the IEC 60870-5-103 protocol. A detailed description of all protocol
information is available in report no 434/TM/5/13 which can be accessed on the
publications section under technical reports, “communications interface manual”.
Table Showing Function Type Numbers Used
Function Type
Description
160 IEC
Overcurrent
Protection
164
Reyrolle Overcurrent Protection
254 IEC
Generic
255 IEC
Global
Cause of Transmission
The cause of transmission (COT) column of the ‘Information Number and Function’ table lists possible causes of
transmission for these frames. The following abbreviations are used:
Table Showing Permitted Cause of Transmission Numbers
Cause of Transmission (COT)
Description
1 Spontaneous
Events
2 Cyclic
3
Reset Frame Count Bit (FCB)
4
Reset Communication Unit (CU)
5 Start
Restart
6 Power
On
7 Test
Mode
8 Time
Synchronisation
9 General
Interrogation
10
Termination of General Interrogation
11 Local
Operation
12 Remote
Operation
20
Positive Command Acknowledge
21
Negative Command Acknowledge
31
Transmission of Disturbance Data
Information Number and Function
The following tables list information number and function definitions together with a description of the message
and function type and cause of transmission that can result in that message. Not all definitions are available on all
relay types – this is dependent on functionality.
KEY FUN
Function Type (defined in IEC60870-5-103 section 7.2.5.1)
INF
Information Number (defined in IEC60870-5-103 section 7.2.5.2)
TYP
ASDU Type (defined in IEC60870-5-103 sections 7.3.1 and 7.3.2)
GI
Event supports General Interrogation x = supported (defined in IEC60870-5-103 section 7.2.5.2)
COM
Type of command single (ON only) or double (ON/OFF) (defined in IEC60870-5-103 section 7.2.5.2)
COT
Cause of Transmission (defined in IEC60870-5-103 section 7.2.3, table 5)
DIR
Direction of event - Raised Only (RO), Raised/Cleared (RC) or Double Point Travelling, Cleared, Raised or
Unknown (DBI)
x
Supported,
-
Not supported.