ProSoft Technology MVI69-101S - Manual (Page 100)

MVI69-101S ♦ CompactLogix or MicroLogix Platform Reference
IEC 60870-5-101 Slave Communication Module
Page 100 of 149 ProSoft Technology, Inc.
March 16, 2009
Monitor Data Transfer
In unbalanced mode the polling procedure is initiated from the master unit
through Class 1 and Class 2 requests. In general, ASDUs containing the causes
of transmission periodic/cyclic are assigned to be transmitted with class 2
requests and all time tagged or spontaneously transmitted ASDUs are assigned
to be transmitted through class 1 requests. Other ASDUs with other causes of
transmission of low priority such as background scan may also be assigned to
class 2 requests.
Typically, you should properly configure the group code for each monitor point to
define how the master will poll for the point. The group codes are defined as
follows:
The Group parameter is defined as follows:
Group Code Description
0x00000001 Interrogated by general interrogation (station or global)
0x00000002 Interrogated by group 1 interrogation
0x00000004 Interrogated by group 2 interrogation
0x00000008 Interrogated by group 3 interrogation
0x00000010 Interrogated by group 4 interrogation
0x00000020 Interrogated by group 5 interrogation
0x00000040 Interrogated by group 6 interrogation
0x00000080 Interrogated by group 7 interrogation
0x00000100 Interrogated by group 8 interrogation
0x00000200 Interrogated by group 9 interrogation
0x00000400 Interrogated by group 10 interrogation
0x00000800 Interrogated by group 11 interrogation
0x00001000 Interrogated by group 12 interrogation
0x00002000 Interrogated by group 13 interrogation
0x00004000 Interrogated by group 14 interrogation
0x00008000 Interrogated by group 15 interrogation
0x00010000 Interrogated by group 16 interrogation
0x00020000 Interrogated by general counter request
0x00040000 Interrogated by group 1 counter request
0x00080000 Interrogated by group 2 counter request
0x00100000 Interrogated by group 3 counter request
0x00200000 Interrogated by group 4 counter request
0x40000000 Disable event scanning of this point
0x80000000 Periodic/cyclic data returned from unit
The module will periodically send all points configured for periodic/cyclic poll
(0x80000000) at every x milliseconds, where x is configured with the following
parameter:
Cyclic data transmission: 20000 #Numb of milliseconds between cyclic
#updates