CM
Note: It should be ensured that thermal ratings of anything connected to the
output relays during the contact test procedure is not exceeded by the
associated output relay being operated for too long. It is therefore
advised that the time between application and removal of contact test
is kept to the minimum.
Repeat the test for relays 2 to 8 for P741 and P742 relays, 2 to 16 for P743 relay.
Return the relay to service by setting cell [COMMISSION TESTS, Test Mode] to ‘Disabled’.
4.2.7 Rear communications port
This test should only be performed where the relay is to be accessed from a remote location
and will vary depending on the communications standard being adopted. It is not the
intention of the test to verify the operation of the complete system from the relay to the
remote location, just the relay’s rear communications port and any protocol converter
necessary.
4.2.7.1
Courier communications
If a K-Bus to EIA(RS)232 KITZ protocol converter is installed, connect a portable PC running
the appropriate software to the incoming (remote from relay) side of the protocol converter.
Ensure that the communications baud rate and parity settings in the application software are
set the same as those on the protocol converter (usually a KITZ but could be a SCADA
RTU). The relays courier address in cell [COMMUNICATIONS, Remote Access] must be set
to a value between 6 (P741) and 34. Check that communications can be established with
this relay using the portable PC.
Check that, using the Master Station, communications with the relay can be established.
4.2.7.2
IEC60870-5-103 communication
IEC 60870-5-103 communication systems are designed to have a local Master Station and
this should be used to verify that the relay’s rear port is working.
Ensure that the communication mode and baud rate settings in the application software are
set the same as those in cells [COMMUNICATIONS, Comms. Mode] and
[COMMUNICATIONS, Baud Rate] of the relay.
Check that, using the Master Station, communications with the relay can be established.
4.2.7.3
IEC 61850 communications
Connect a portable PC running the appropriate IEC 61850 Master Station Software or MMS
(Manufacturing Message Specification) browser to the relays Ethernet port (RJ45 or ST fiber
optic connection). The terminal numbers for the relays Ethernet port are given in Table 5.
Configuration of the relay IP parameters (IP Address, Subnet Mask, Gateway) and SNTP
time synchronization parameters (SNTP Server 1, SNTP Server 2) is performed by the IED
Configurator tool, so if these parameters are not available via an SCL file, they must be
configured manually.
If the assigned IP address is duplicated elsewhere on the same network, the remote
communications will operate in an indeterminate way. However, the relay will check for a
conflict on every IP configuration change and at power up. An alarm will be raised if an IP
conflict is detected. The relay can be configured to accept data from networks other than the
local network by using the ‘Gateway’ setting.
Check that communications with this relay can be established.
In order to communicate with an IEC 61850 IED on Ethernet, it is necessary only to know its
IP address. This can then be configured into either:
− An IEC 61850 “client” (or master), for example a PACiS computer (C264) or HMI, or
− An “MMS browser”, with which the full data model can be retrieved from the IED,
without any prior knowledge
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