ABB REC670 Applications Manual page 108

Section 6
Wide area measurement system
102
5. UDPDestPort[x] – UDP destination port number for UDP client group[x]
6. TCPportUDPdataCtrl[x] – TCP port to control of data sent over UDP client
group[x], i.e. to receive commands and send configuration frames
7. SendCfgOnUDP[x] – Send configuration frame 2 (CFG-2) on UDP for client
group[x]
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 frame (RTDOFF/RTDON) remotely from the client to the
PMU as defined in IEEE 1344/C37.118 standard.
However, such a remote control to stop the streams from the client is only possible
when the parameter SendDataUDP[x] is set to SetByProtocol. The command
RTDOFF/RTDON sent by 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 SendDataUDP[x] is set toOn the RTDOFF/RTDON commands
received from the clients are ignored in the IED.
It is recommended not to set the parameter SendDataUDP[x] to SetByProtocol in
case of a multicast. This is because if one of the clients sends the RTDOFF
command, all the clients will 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 SendCfgOnUDP[x] to On, the configuration
frame 2 (CFG-2) 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 PMU clients are receiving the
same UDP stream from the same UDP group (UDP client group[x]).
As shown in Figure 32, there are maximum 2 instances of PMUREPORT function
blocks available in the IED. Each UDP client group[x] can only connect to one of
the PMUREPORT instances at the same time. This is defined in the PMU by the
parameter PMUReportUDP[x] which is used to define the instance number of
PMUREPORT function block that must send data on this UDP stream (UDP client
group[x]).
The data streams in the IED can be sent as unicast or as multicast. The user-defined
IP address set in the parameter UDPDestAddress[x] for each UDP stream defines if
it is a Unicast or Multicast. The address range 224.0.0.0 to 239.255.255.255 (Class
D IP addresses) is treated as multicast. Any other IP address outside this range is
treated as unicast and the UDP data will be only sent to that specific unicast IP
address. In addition to UDPDestAddress[x] parameter, UDPDestPort[x] parameter
is used to define the UDP destination port number for UDP client group[x].
1MRK 511 401-UEN A
Bay control REC670 2.2 IEC
Application manual