Iec60870-5-103: Interoperability; Physical Layer; Iec60870-5-103 Interface; Electrical Interface: Eia Rs-485 - Toshiba GRE110 Instruction Manual

IEC60870-5-103: Interoperability

1. Physical Layer

1.1 Electrical interface: EIA RS-485

Number of devices, 32 for one protection equipment
1.2 Transmission speed
User setting: 9600 or 19200 bit/s
2. Application Layer
COMMON ADDRESS of ASDU (Application Service Data Unit)
One COMMON ADDRESS OF ASDU (identical with station address)

3. IEC60870-5-103 Interface

3.1 Spontaneous events
The events created by the relay will be sent using the Function type (FUN) / Information
numbers (INF) to the IEC60870-5-103 master station. 8 wide-use events are provided.
3.2 General interrogation
The GI request can be used to read the status of the relay, the Function types and Information
numbers that will be returned during the GI cycle are shown in the table below.
3.3 Cyclic measurements
The relay will produce measured values using Type ID=3 and 9 on a cyclical basis, this can be
read from the relay using a Class 2 poll. The rate at which the relay produces new measured
values is 2 seconds.
It should be noted that the measurands transmitted by the relay are sent as a proportion of either
1.2 or 2.4 times the rated value of the analog value. Either 1.2 or 2.4 can be selected by the
"IECNFI" setting.
3.4 Commands
A list of the supported commands is contained in the table below. The relay will respond to
other commands with an ASDU 1, with a cause of transmission (COT) of negative
acknowledgement of a command.
3.5 Test mode
In test mode, both spontaneous messages and polled measured values, intended for processing in
the control system, are designated by means of the CAUSE OF TRANSMISSION 'test mode'.
This means that CAUSE OF TRANSMISSION = 7 'test mode' is used for messages normally
transmitted with COT=1 (spontaneous) or COT=2 (cyclic).
For details, refer to the standard IEC60870-5-103.
3.6 Blocking of monitor direction
If the blocking of the monitor direction is activated in the protection equipment, all indications
and measurands are no longer transmitted.
For details, refer to the standard IEC60870-5-103.
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6 F 2 T 0 1 7 2