108
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
IEC 60870-5-104 COMMUNICATIONS
CHAPTER 6: COMMUNICATIONS
IEC Common Address of ASDU
Range: 0 to 65535 in steps of 1
Default: 0
This setting specifies the local address of the D90
Plus
for IEC 60870-5-104 transactions.
The address is common to all data in a single ASDU (Application Service Data Unit). The
combination of ASDU common address and IOA (Information Object Address) uniquely
identifies each data item in a system.
IEC Cyclic Data Period
Range: 1 to 65535 seconds in steps of 1
Default: 60 seconds
This setting specifies the rate at which the D90
Plus
sends updated point data regardless
of whether or not a status change has occurred. This data includes binary inputs, binary
outputs, and analog inputs.
IEC Current Default Threshold, IEC Voltage Default Threshold, IEC Power Default
Threshold, IEC Other Default Threshold
Range: 0 to 100000000 in steps of 1
Default: 30000
These settings are used to determine when to trigger spontaneous responses containing
M_ME_NC_1 analog data. These settings group the D90
Plus
analog data into types:
current, voltage, power, energy, and other. Each setting represents the default threshold
value for all M_ME_NC_1 analog points of that type. For example, to trigger spontaneous
responses from the D90
Plus
when any current values change by 15 amps, the
IEC
Current Default Threshold
setting should be set to “15”. Note that these settings are the
default values of the deadbands. P_ME_NC_1 (parameter of measured value, short
floating point value) points can be used to change threshold values, from the default, for
each individual M_ME_NC_1 analog point. Whenever power is removed and re-applied
to the D90
Plus
, the default thresholds will be in effect.
IEC 60870-5-104 point lists
The MSP and MME points for IEC 60870-5-104 protocol can configured to a maximum of
256 points. The value for each point is user-programmable and can be configured by
assigning FlexLogic™ operands for binary MSP points or FlexAnalog™ parameters for
analog MME points.
The IEC 60870-5-104 point lists always begin with point 0 and end at the first “Off” value.
Since IEC 60870-5-104 point lists must be in one continuous block, any points assigned
after the first “Off” point are ignored. Changes to the IEC 60870-5-104 point lists will not
take effect until the D90
Plus
is restarted.
Select the
Settings > Communications > IEC 60870-5-104 > User Point List
menu item to
open the IEC 60870-5-104 user point list configuration window.
