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DEVICE
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IEC 60870-5-104
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4–46
1.
A default variation refers to the variation response when variation 0 is requested and/
or in class 0, 1, 2, or 3 scans. The default variations for object types 1, 2, 20, 21, 22, 23,
30, and 32 are selected via relay settings. This optimizes the class 0 poll data size.
2.
For static (non-change-event) objects, qualifiers 17 or 28 are only responded when a
request is sent with qualifiers 17 or 28, respectively. Otherwise, static object requests
sent with qualifiers 00, 01, 06, 07, or 08, are responded with qualifiers 00 or 01. For
change event objects, qualifiers 17 or 28 are always responded.
Cold restarts are implemented the same as warm restarts – the 850 is not restarted, but
the DNP process is restarted.
The IEC 60870-5-104 communications protocol is supported on Ethernet ports 4 and 5
only. Setting changes become active after rebooting.
In 850 both DNP and IEC104 protocol can work at the same time, but the user has to
consider that there is only one point map. So, the two protocols use the same data
mapping, i.e., same point index and same point source.
The 850 supports up to two IEC104 client connections simultaneously.
Path:
Setpoints > Device > Communications > IEC 60870-5-104
..\Communications\IEC 60870-5-104
Item Name
Channel 1 Port
Channel 2 Port
Common Address of ASDU
Client Address 1
Client Address 2
TCP Port Number 1
TCP Port Number 2
Cyclic Data Period
Object Info Addrs Bnry
Object Info Addrs Analog
Object Info Addrs Countrs
Object Info Addrs Cmnd
Object Info Analog Param
By default the Object Information Address for the different data is as follows:
M_SP (Single Points) = 1000
M_ME (Measured value) = 2000
M_IT (Integrated Totals) = 3000
C_SC or C_DC (Single or Double Command) = 4000
P_ME_NB (Parameter of measured value) = 5000
Each Measured value has a Parameter of measured value (P_ME_NB) associated to its
threshold.
The IEC 60870-5-104 Deadbands settings are used to determine when to trigger
spontaneous responses containing M_ME_NB_1 analog data. Each setting represents the
threshold value for each M_ME_NB_1 analog point.
For example, to trigger spontaneous responses from the 850 when a current value
changes by 15 A, the "Analog Point xx Deadband" setting should be set to 15. Note that
these settings are the default values of the deadbands. P_ME_NB_1 (parameter of
measured value, scaled value) points can be used to change threshold values, from the
default, for each individual M_ME_NB_1 analog point. There are three ways to send the
measurands to the Master station. The measurands are part of the General Group and
Value
Unit
Network - TCP
Network - TCP
0
0. 0. 0. 0
0. 0. 0. 0
2404
2404
60
s
1000
2000
3000
4000
5000
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
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