ProSoft Technology PTQ-101M - Manual (Page 118)

PTQ-101M ♦ Quantum Platform Reference
IEC 60870-5-101 Master Communication Module
Page 118 of 181 ProSoft Technology, Inc.
May 14, 2008
The following table shows the results of the PTQ-101M response to the
command control block.
Command Control Word Description
30001 Input sequence number
30002 Block ID
30003 Block response word 1
30004 Block response word 2
30005 Block response word 3
… …
30064
Block response word 62
The module recognizes that there is a new block request when it identifies that
the block sequence number has changed. If the block ID is valid, the module will
process the block and copy the response to the input command control area (3x
for or %IW for Unity). The module will increment the block sequence number by
one, as shown in the following illustration.
New block
sequence
number?
Valid block ID
request?
Process the block
Copy block response
to input command
control area with
incremented block
sequence number
No
No
Yes
Yes