122
Serial communication Chapter 9
Data communication
• Report of analog service values (measurements)
• Fault location
• Command handling
- Autorecloser ON/OFF
- Teleprotection ON/OFF
- Protection ON/OFF
- LED reset
- Characteristics 1 - 4 (Setting groups)
• File transfer (disturbance files)
• Time synchronization
The events created in the terminal available for the IEC protocol are based on the event function
blocks EV01 - EV06 and disturbance function blocks DRP1 - DRP3. The commands are repre-
sented in a dedicated function block ICOM. This block has output signals according to the IEC
protocol for all commands.
2.3 Setting parameters
Path in local HMI: Configuration/TerminalCom/SPA-IEC-LON
Table 127: Setting parameter for selection of communication protocols for rear ports
2.4 Serial communication, SPA
2.4.1 Application
This communication bus is mainly used for SMS. It can include different numerical relays/ter-
minals with remote communication possibilities. Connection to a personal computer (PC) can
be made directly (if the PC is located in the substation) or by telephone modem through a tele-
phone network with ITU (former CCITT) characteristics.
2.4.2 Design
When communicating with a PC, using the rear SPA port, the only hardware needed for a station
monitoring system is:
• Optical fibres
• Opto/electrical converter for the PC
•PC
or
• An RS485 network installation according to EIA
•PC
Parameter Range Default Unit Description
Port SPA-LON,
IEC-LON,
SPA-IEC
SPA-LON - Communication protocol alternatives for
the rear communication ports
To Next Page
Loading...
