The communication between the protection relay and PCM600 is independent of the used communication protocol within the substation or to the NCC.
All communication is done over Ethernet using either IEC 61850 or the FTP/FTPS protocol.
When an Ethernet-based station protocol is used, the same Ethernet port and IP address can be used for PCM600 communication.
Two basic variants have to be considered for the connection between PCM600 and the protection relay.
- Protection relays front port is being used for direct point-to-point link between PCM600 and the protection relay
- Indirect link via station LAN or remotely via network
- If needed, the IP address for the protection relay is set.
- A PC or workstation is set up for a direct link (point-to-point), or the PC or workstation is connected to the LAN/WAN network.
- The protection relays' IP addresses in the PCM600 project are configured to match the IP addresses of the physical IEDs.
-
Technical keys of the IEDs in the PCM600 project are configured to match the technical keys of the physical IEDs.
For successful protection relay engineering and usage, the workstation firewall TCP and UDP port configurations should be checked, especially for IEC 61850 and FTP. Other protocols are not used for engineering or they are optional.
Table 1. IP ports used by the relay Port number
Type
Default state
Description
21
TCP
Open
Explicit FTP over TLS
22
TCP
Closed
SSH (HMI only, normally closed)
102
TCP
Open
IEC 61850
443
TCP
Open
Web server HTTPS
80
TCP
Closed
Traffic redirect to HTTPS port 443 TCP
123
UDP
Client service not active by default in relay
SNTP
502
TCP
Closed
Modbus TCP
2404
TCP
Closed
IEC 60870-5-104 TCP
20000
TCP
Closed
DNP3 TCP
20000
UDP
Closed
DNP3 UDP
1468
TCP
Closed
CAL
514
UDP
Closed
CAL
49220...49235
TCP
Closed
Ports open on demand for data transfer when FTP PASV command is given