ProSoft Technology MVI69-103M - Manual (Page 104)

MVI69-103M ♦ CompactLogix or MicroLogix Platform Reference
IEC 60870-5-103 Master Communication Module
Page 104 of 131 ProSoft Technology, Inc.
November 3, 2008
5.7.2 List of Cause of Transmission Codes
In Monitor Direction
COT Description
1 spontaneous
2 cyclic
3 reset frame count bit (FCB)
4 reset communication unit (CU)
5 start/restart
6 power on
7 test mode
8 time synchronization
9 general interrogation
10 termination of general interrogation
11 local operation
12 remote operation
20 positive ack of command
21 negative ack of command
31 transmission of disturbance data
40 positive ack of generic write command
41 negative ack of generic write command
42 valid data response to generic read command
43 invalid data response to generic read command
44 generic write confirmation
In Control Direction
COT Description
8 time synchronization
9 initiation of general interrogation
20 general command
31 transmission of disturbance data
40 generic write command
42 generic read command