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10 Communication
ASDU 2, time-tagged message with relative time: tripping messages and fault detector pickup
messages.
ASDU 40, single point information: general binary input state change messages.
ASDU 41, single point information with time-tagged: sequence of event (SOE) messages.
10.3.5 General Interrogation
The GI can be used to read the status of the relay, the function numbers, and information numbers
that will be returned during the GI cycle. The GI cycle strictly abides by the rules defined in the
IEC60870-5-103.
The relay will respond to this GI command with an ASD U 44 message, the cause of transmission
(COT) of this response is 9.
Referring the IEC60870-5-103 standard can get the enough details about general interrogation.
10.3.6 Cyclic Measurements
The relay will produce measured values using ASDU 50 on a cyclical basis, this can be read from
the relay using a Class 2 poll (note ADSU 3 and ASDU 9 are not used).
The cause of transmission is 2. The rate at which the relay produces new measured values is fixed
(about one second). It should be noted that the measurands transmitted by the relay are sent as a
proportion of corresponding times the rated value of the analog value.
10.3.7 General Commands
A list of the supported commands (in control direction) is contained in the following table. The relay
will not respond to other commands, and short-term communication interruption will occur.
TYP
ASDU 64
ASDU 64
ASDU 64
ASDU 64
ASDU 64
ASDU 64
If the relay receives one of the command messages correctly, it will respond with an ACK message,
and then send a message which has the same ASDU data with the control direction message in
the next communication turn.
10.3.8 Generic Functions
The generic functions can be used to read the setting and protection measurement of th is relay,
and modify the setting.
Two supported type identifications are ASDU 21 and ASDU 10. For more details about generic
functions, see the IEC60870-5-103 standard.
10-6
FUN
INF
DCC
1
48
0x81
1
48
0x82
1
48
0x01
1
48
0x02
1
48
0xC1
1
48
0xC2
Date: 2014-04-08
Function
Remote trip with selection
Remote close with selection
Remote trip with execution
Remote close with execution
Remote trip with abortion
Remote close with abortion
PCS-9611 Feeder Relay
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