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4.3 Local Communication
The following functions can be operated from a personal computer using an RS232C port on the
front panel.
(1) Relay Setting and Monitoring (RSM100) function
On the personal computer, the following analysis and display of the fault currents and voltages are
available in addition to the items available on the LCD screen.
• Display of current and voltage waveform:
• Symmetrical component analysis:
• Harmonic analysis:
• Frequency analysis:
(2) PLC function
• Program of sequence logic:
• Installing and reading the PLC logic on a relay
(3) MIMIC function
• MIMIC configuration
• Installing the MIMIC configuration on a relay
For the details, see the separate instruction manuals "PC INTERFACE RSM100", "PLC TOOL"
and "MIMIC EDITOR TOOL".
4.4 Remote Communication
Remote communication is available via RS485 port. The GRD150 can be provided for
communication interface such as Relay Setting and Monitoring system(RSM), IEC 60870-5-103,
DNP 3.0 or Modbus RTU etc., to connect a PC or a substation control system and to construct a
network communication.
The RSM system is a system that retrieves and analyses the data on power system quantities, fault
and event records and views or changes settings in individual relays via a telecommunication
network using a remote PC.
Figure 4.4.1 shows the typical configuration of the RSM system via a protocol converter G1PR2.
The relays are connected through twisted pair cables, and the maximum 256 relays can be
connected since the G1PR2 can provide up to 8 ports. The total length of twisted pair wires should
not exceed 1200 m. Relays are mutually connected using an RS485 port on the relay rear panel and
connected to a PC RS232C port via G1PR2. Terminal resistor (150 ohms) is connected the last
relay. The transmission rate used is 64 kbits/s.
Relays are mutually connected using an RS485 port and connected to a PC RS232C port via the
protocol converter G1PR2 or the RS485/232 level converter. When the G1PR2 is used, the
switching setting [CH1 Protocol] is set to "RSM-X" and the transmission rate used is 64 kbits/s. In
case of the RS485/232 level converter, the switch [CH1 Protocol] is set to "Modbus" and the
transmission rate is selected by the switch [Baud rate] setting.
For setting the communication interface, refer to Section 4.2.6.7.
Oscillograph display
On arbitrary time span
On arbitrary time span
On arbitrary time span
Setting and change
Creation and change
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