ABB Relion 670 Series Applications Manual page 101

1MRK 511 401-UEN Rev. K
PMUREPORT instance configured in the IED with matching PMU ID, then the client connection
over TCP with the IED will be established and further communication will take place.
Otherwise, the connection will be terminated and the
PMU Diagnostics on the Local HMI under Main menu/Diagnostics/Communication/PMU
diagnostics/PMUSTATUS:1
It is possible to turn off/on the TCP data communication by sending a IEEE1344 or C37.118
command frame remotely from the client to the PMU containing
At any given point of time maximum of 8 TCP clients can be connected to the IED for
IEEE1344/C37.118 protocol. If there is an attempt made by the 9th client, the connection to the
new client will be terminated without influencing the connection of the other clients already
connected. A list of active clients can be seen on the Local HMI in the diagnostics menu under
Main menu/Diagnostics/Communication/PMU diagnostics/PMUSTATUS:1
6.1.3.2 Short guidance for use of UDP
The IED supports maximum of 6 concurrent UDP streams. They can be individually configured
to send IEEE1344 or C37.118 data frames as unicast / multicast. Note that [x] at the end of
each parameter is referring to the UDP stream number (UDP client group) and is a number
between 1 and 6. Each of the 6 UDP groups in the IED has the following settings:
SendDataUDP[x] – Enable / disable UDP data stream
1.
2. ProtocolOnUDP[x] – Send IEEE1344 or C37.118 on UDP
PMUReportUDP[x] – Instance number of PMUREPORT function block that must send data
3.
on this UDP stream (UDP client group[x])
UDPDestAddres[x] – UDP destination address for UDP client group[x] (unicast / multicast
4.
address range)
UDPDestPort[x] – UDP destination port number for UDP client group[x]
5.
TCPportUDPdataCtrl[x] – TCP port to control of data sent over UDP client group[x], i.e. to
6.
receive commands and send configuration frames
SendCfgOnUDP[x] – Send configuration frame 2 (CFG-2) on UDP for client group[x]
7.
It is possible to turn off/on the UDP data communication either by setting the parameter
SendDataUDP[x] to Off/On locally in the PMU or by sending a C37.118 or IEEE1344 command
RTDOFF/RTDON ) remotely from the client to the PMU as defined in IEEE 1344/C37.118
frame (
standard.
However, such a remote control to stop the streams from the client is only possible when the
parameter
the client is stored in the IED, i.e. if the IED is rebooted for some reason, the state of the
stream will remain the same.
If the parameter
the clients are ignored in the IED.
It is recommended not to set the parameter
multicast. This is because if one of the clients sends the
stop receiving the frames.
The UDP implementation in the IED is a UDP_TCP. This means that by default, only the data
frames are sent out on UDP stream and the header frame, configuration frame and command
frame are sent over TCP. This makes the communication more reliable especially since
commands are sent over TCP which performs request/acknowledgment exchange to ensure
that no data (command in this case) is lost.
However, by setting the parameter
of IEEEC37.118 data stream is cyclically sent on the corresponding UDP stream (UDP client
group[x]) once per minute. This is useful in case of multicast UDP data stream when a lot of
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SendDataUDP[x] is set to SetByProtocol . The command RTDOFF/RTDON sent by
SendDataUDP[x] is set to On the RTDOFF/RTDON commands received from
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TCPCtrlCfgErrCnt is incremented in the
SendDataUDP[x] to SetByProtocol in case of a
RTDOFF command, all the clients will
SendCfgOnUDP[x] to On , the configuration frame 2 (CFG-2)
Wide area measurement system
RTDOFF/RTDON command.
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