GE 845 Instruction Manual page 150

DEVICE
4–46
Path:
Setpoints > Device > Communications > IEC 60870-5-104
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IEC 60870-5-104
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 845 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
Group 2, so when a general interrogation or group 2 interrogation takes place all the
measurands are included in the response. Also, there is a cyclic data period setting where it
is configured in the scan period to send the measurands to the Master. And the last way, is
by sending spontaneously when a deadband overflow takes place. The IEC104 Channels
sub-menu is shown below.
Commands are executed over the Binary Outputs. The first 8 Binary Outputs are
configured to receive Select/Operate Commands and the next 8 Binary Outputs are
configured to receive Direct Execute Commands.
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IEC104
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CHANNELS
IEC104 COMMON
Message
ADDRESS OF ASDU:0
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IEC104 NETWORK
Message
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CLIENT ADDRESSES
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IEC104 TCP
Message
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PORTS
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IEC104 CYCLIC DATA
Message
PERIOD: 60 s
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IEC104 Obj Info
Message
Addr Binary: 1000
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IEC104 Obj Info
Message
Addr Analog: 2000
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IEC104 Obj Info
Message
Addr Counter: 3000
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IEC104 Obj Info
Message
Addr Command: 4000
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IEC104 Obj Info
Message
Analog Param: 5000
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Range: see sub-menu below
Range: 0 to 65535 in steps of 1
Range: see sub-menu below
Range: see sub-menu below
Range: 0 to 65535 in steps of 1
Range: 0 to 16777215 in steps of 1
Range: 0 to 16777215 in steps of 1
Range: 0 to 16777215 in steps of 1
Range: 0 to 16777215 in steps of 1
Range: 0 to 16777215 in steps of 1