IEC-60870-5-104 (104S) Protocol Implementation
104S
♦
ProLinx Gateway
Protocol Manual
(Firmware v3.00 and later)
Page 54 of 157
ProSoft Technology, Inc.
January 22, 2010
3.3.1 Monitor Data Transfer
One aspect of the point configuration database that leads to confusion is the group
definition field. This assignment for each point assigns a point to one or more
interrogation groups. Use of interrogation groups permits the controlling unit to
interface with a specific set of data. Refer to the IEC 60870-5-104 standard for a full
discussion of interrogation groups. A specific group, Periodic data group, reports
data points on a set frequency. The frequency is set in the
Cyclic Data
Transmission
parameter in the configuration file. Remember that a point can be
assigned to more than one group.
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 (See
Note 1
, below)
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
Note 1
: Group 3 interrogation also returns the parameter data (ASDU 110 – threshold, low limit and
high limit) for all monitored measured points.
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