Protocol write access rights - Arc protection - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Grid automation - Busbar differential protection (high impedance) - Line differential protection - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Interconnection protection - Generator protection - Power management/Load shedding - Operation Manual - REX615 Protection and control - Relion Protection and Control - PCL2 - IEC - ANSI - 01.04.2026

REX615 Operation Manual

Write access rights are configurable for FTP, MMS, and HTTPS protocols in Configuration > Authorization. The write access parameters are used to narrow down services that allow setting changes on different network interfaces. Disabling the FTP and IEC 61850 MMS write access on Network 1 and 2 prevents the user from updating the configuration to the protection relay from PCM600. Disabling the HTTPS write access prevents the user from writing setting changes from WHMI.

Table 1. Protocol write access in the protection relay
Parameter Options Description
Configuration/Authorization/Network1/FTP write access Off FTP write access denied for Network 1
On (Default) FTP write access allowed for Network 1
Configuration/Authorization/Network1/MMS write access Off IEC 61850 MMS write access denied for Network 1
On (Default) IEC 61850 MMS write access allowed for Network 1
Configuration/Authorization/Network1/HTTPS write access Off HTTPS write access denied for Network 1
On (Default) HTTPS write access allowed for Network 1
Configuration/Authorization/Network2/FTP write access Off FTP write access denied for Network 2
On (Default) FTP write access allowed for Network 2
Configuration/Authorization/Network2/MMS write access Off IEC 61850 MMS write access denied for Network 2
On (Default) IEC 61850 MMS write access allowed for Network 2
Configuration/Authorization/Network2/HTTPS write access Off HTTPS write access denied for Network 2
On (Default) HTTPS write access allowed for Network 2
Configuration/Authorization/HMI/FTP write access Off FTP write access denied for the HMI port
On (Default) FTP write access allowed for the HMI port
Configuration/Authorization/HMI/MMS write access Off IEC 61850 MMS write access denied for the HMI port
On (Default) IEC 61850 MMS write access allowed for the HMI port

Configuration/Authorization/Network1 VLAN/ VLAN1 FTP write access

Off

VLAN1 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN1 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN1 MMS write access

Off

VLAN1 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN1 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN1 HTTPS write access

Off

VLAN1 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN1 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN2 FTP write access

Off

VLAN2 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN2 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN2 MMS write access

Off

VLAN2 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN2 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN2 HTTPS write access

Off

VLAN2 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN2 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN3 FTP write access

Off

VLAN3 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN3 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN3 MMS write access

Off

VLAN3 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN3 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN3 HTTPS write access

Off

VLAN3 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN3 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN4 FTP write access

Off

VLAN4 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN4 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN4 MMS write access

Off

VLAN4 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN4 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN4 HTTPS write access

Off

VLAN4 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN4 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN5 FTP write access

Off

VLAN5 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN5 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN5 MMS write access

Off

VLAN5 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN5 FTP write access allowed for Network 1 VLAN

Configuration/Authorization/Network1 VLAN/ VLAN5 HTTPS write access

Off

VLAN5 FTP write access denied for Network 1 VLAN

On (Default) 

VLAN5 FTP write access allowed for Network 1 VLAN

Note: PCM600 is using FTP or FTPS protocol to communicate with the protection relay. If the FTP write access is disabled for a network PCM600 functionality is limited to support read operations only from Disturbance handling, Event viewer and Parameter Setting.
Note: Enabling Network 2 IP address requires additional configuration in PCM600 to define IEC 61580 subnetworks. This configuration is done via Ethernet Configuration and IEC 61850 Configuration in PCM600.
Table 2. VLAN parameters
Parameter Options Description

Communication/Ethernet/Network1 VLAN/VLAN1-5 tagging mode

Tagged

VLAN1-5 Tagged

Communication/Ethernet/Network1 VLAN/VLAN1-5 id

100

VLAN tag identifier

Communication/Ethernet/Network1 VLAN/VLAN1-5 QoS

0

VLAN Quality of Service

Communication/Ethernet/Network1 VLAN/VLAN1-5 IP address

192.168.2.10

VLAN IP address

Communication/Ethernet/Network1 VLAN/VLAN1-5 subnet mask

255.255.255.0

VLAN Subnet mask

Communication/Ethernet/Network1 VLAN/VLAN1-5 default gw

0.0.0.0

VLAN Default gateway

Communication/Ethernet/IP routes/IP route 1-10 enabled

False (Default)

IP route 1-10 disabled

True

IP Route 1-10 enabled

Communication/Ethernet/IP routes/Dst IP address 1-10

0.0.0.0

IP address for DST 1-10

Communication/Ethernet/IP routes/Dst subnet mask 1-10

255.255.255.0

Destination subnet mask

Communication/Ethernet/IP routes/Gw IP address 1-10

0.0.0.0

Gateway IP address

Communication/Ethernet/IP settings/IP MTU

1500

Internet Protocol Maximum Transmission Unit