Commissioning P54x/EN CM/La4
MiCOM P543, P544, P545 & P546
CM) 10-23
CM
5.2.8 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.
5.2.8.1 Courier communications
If a K-Bus to EIA(RS)23
2 KITZ protocol converter is installed, connect a portable PC running
the appropriate software to the incoming (remote from relay) side of the protocol converter.
The terminal numbers for the relay’s K-Bus port are given in the table below.
Connection Terminal
K-Bus IEC 60870-5-103 or DNP3.0 P54x
Screen Screen M16 - (P545, P546)
1 +ve M17 - (P545, P546)
2 –ve M18 - (P545, P546)
Screen Screen J16 - (P543, P544)
1 +ve J17 - (P543, P544)
2 –ve J18 - (P543, P544)
Table 5: EIA(RS)485 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 relays courier address in cell [0E02: COMMUNICATIONS, Remote Access] must
be set to a value between 1 and 254.
Check that communications can be established with this relay using the portable PC.
5.2.8.2 IEC 60870-5-103 (VDEW) communications
If the rel
ay has the optional fiber optic communications port fitted, the port to be used should
be selected by setting cell [0E07: COMMUNICATIONS, Physical Link] to ‘Fiber Optic’.
IEC 60870-5-103/VDEW communication systems are designed to have a local Master
Station and this should be used to verify that the relay’s fiber optic or EIA(RS)485 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 cell [0E04: COMMUNICATIONS, Baud Rate] of the relay.
Check that, using the Master Station, communications with the relay can be established.
5.2.8.3 DNP3.0 interface
Con
nect a portable PC running the appropriate DNP3.0 software to the relay's EIA(RS)485
port via an EIA(RS)232 interface converter. The terminal numbers for the relay's
EIA(RS)485 port are given in Table 5. Ensure that the relay address, baud rate and parity
are set the same as those in cells [0E04: COMMUNICATIONS, Baud Rate] and
[0E05: COMMUNICATIONS, Parity] of the relay.
Check that communications with this relay can be established.
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