ProSoft Technology MVI56-103M - Manual (Page 132)

Reference MVI56-103M ♦ ControlLogix Platform
User Manual IEC 60870-5-103 Master Communication Module
Page 132 of 152 ProSoft Technology, Inc.
February 22, 2013
5.8.7 Definition and Presentation of ASDUs in Control Direction
TYPE 6: Time synchronization
Bytes Description Spec
1 Value of 6
1 0x81
1 COT
1 Common address of ASDU
1 Function Type = GLB (255)
1 Information number
7 7-Octet binary time 7.2.6.29
TYPE 7: Initiation of general interrogation
Bytes Description Spec
1 Value of 7
1 0x81
1 COT
1 Common address of ASDU
1 Function Type = GLB (255)
1 Information number
1 SCN (scan number 0 to 255) 7.2.6.21
TYPE 20: General command
Bytes Description Spec
1 Value of 20
1 0x81
1 COT
1 Common address of ASDU
1 Function Type
1 Information number
1 DCO (1=Off, 2=On) 7.2.6.4
1 RII 7.2.6.19
RII is not to be processed within the protection equipment, but to be used as a
SIN of the return message.