Siemens Argus 7SR21 Technical Manual page 401

3.3 Application Service Data Unit (ASDU) Type
The Application Service Data Unit (ASDU) column of the
ASDUs returned for a point.
ASDU #
1 Time tagged message (monitor direction)
2 Time tagged message (relative time) (monitor direction)
3.1 Measurands I
4 Time-tagged measurands with relative time
5 Identification message
6 Time synchronisation
7 General Interrogation Initialization
9 Measurands II
20 General command
© 2017 Siemens Protection Devices Limited
Chapter 4 - Data Communications Definitions
"Information Number and Function"
Description
table lists the possible
Chapter 4 - Page 21 of 96