ProSoft Technology PTQ-101M - Manual (Page 146)

PTQ-101M ♦ Quantum Platform Reference
IEC 60870-5-101 Master Communication Module
Page 146 of 181 ProSoft Technology, Inc.
May 14, 2008
The following illustration shows a typical initialization procedure for the
unbalanced mode:
Balanced Mode
During balanced mode, the link must be initialized in both directions. The PTQ-
101M module also always reinitializes the link after it receives an initialization
request from the master. Therefore, the following initialization occurs during
balanced mode, after PTQ-101M boots.
Slave Module
Slave initializes
the link
101M Module
initializes the link
Status of Link
Status of Link Response
Reset Remote Link
ACK
Status of Link
Status of Link Response
Reset Remote Link
ACK
Status of Link
Status of Link Response
Reset Remote Link
ACK
101M Module
re-initializes the link