7SG11 Argus 2 Diagrams and Parameters
©2010 Siemens Protection Devices Limited
P20009 Page 17 of 37
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
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.