Areva MiCOM P441, Technical Manual

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Commissioning P44x/EN CM/E33
MiCOM P441/P442 & P444 Page 15/54
4.2.9 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.
4.2.9.1 Courier Communications
If a K-Bus to RS232 KITZ protocol converter is installed, connect a portable PC running the
appropriate software to the incoming (remote from relay) side of the protocol converter.
If a KITZ protocol converter is not installed, it may not be possible to connect the PC to the
type installed. In this case a KITZ protocol converter and portable PC running appropriate
software should be temporarily connected to the relay’s K-Bus port. The terminal numbers
for the relay’s K-Bus port are given in table 7. However, as the installed protocol converter is
not being used in the test, only the correct operation of the relay’s K-Bus port will be
confirmed.
Connection Terminal
K-Bus Modbus or VDEW P441 P442 P444
Screen Screen F16 J16 N16
1 +ve F17 J17 N17
2 –ve F18 J18 N18
TABLE 7 - RS485 TERMINALS
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 relay’s Courier address in cell [0E02: COMMUNICATIONS, Remote Address]
must be set to a value between 0 and 255.
Check that communications can be established with this relay using the portable PC.
4.2.9.2 Modbus Communications
Connect a portable PC running the appropriate Modbus Master Station software to the
relay’s RS485 port via a RS485 to RS232 interface converter. The terminal numbers for the
relay’s RS485 port are given in table 7.
Ensure that the relay address, baud rate and parity settings in the application software are
set the same as those in cells [0E03: COMMUNICATIONS, Remote Address], [0E06:
COMMUNICATIONS, Baud Rate] and [0E07: COMMUNICATIONS, Parity] of the relay.
Check that communications with this relay can be established.
4.2.9.3 IEC60870-5-103 (VDEW) Communications
If the relay has the optional fibre optic communications port fitted, the port to be used should
be selected by setting cell [0E09: COMMUNICATIONS, Physical Link] to ‘Fibre Optic’ or
‘RS485’.
IEC60870-5-103/VDEW communication systems are designed to have a local Master Station
and this should be used to verify that the relay’s fibre optic or RS485 port, as appropriate, is
working.
Ensure that the relay address and baud rate settings in the application software are set the
same as those in cells [0E03: COMMUNICATIONS, Remote Address] and [0E06:
COMMUNICATIONS, Baud Rate] of the relay.
Check that, using the Master Station, communications with the relay can be established.