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 RES670 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].
In case of multicast IP, it will be the network switches and routers that take care of
replicating the packet to reach multiple receivers. Multicast mechanism uses network
infrastructure efficiently by requiring the RES670 to send a packet only once, even if it
needs to be delivered to a large number of receivers.
When using the multicast IP address range (Class D IP addresses), the user can choose the
physical network interface on the device to send out the multicast data by setting the
parameter
MCastCtrlPortSel[x]
. If
MCastCtrlPortSel[x]
is set to
Any/Follow Gateway
it
means that the multicast UDP stream will follow the gateway and will be routed to the
physical network interface which is on the same subnetwork as the gateway. Here
Any
means that any physical network interface (Front port, LANAB, LANCD) can be used for
sending the TCP command frames.
If there are more than one UDP client group defined as multicast, the user shall set
different multicast IP addresses for each UDP group. If the user set similar multicast IP
addresses for multiple UDP groups, the
MCastCtrlPortSel[x]
setting of the first UDP
group with similar multicast IP will be applied to all the UDP groups with similar
multicast IP address.
The PMU clients receiving the UDP frames can also connect to RES670 to request
(command frame) config frame 1, config frame 2, config frame 3, or header frame, and to
disable/enable real time data. This can be done by connecting to the TCP port selected in
TCPportUDPdataCtrl[x]
for each UDP group. This connection is done using TCP. The
RES670 allows 4 concurrent client connections for every
TCPportUDPdataCtrl[x]
port
(for each UDP client group[x]).
If the client tries to connect on
TCPportUDPdataCtrl[x
] port using a PMU-ID other than
what is configured for that PMUREPORT instance (
PMUReportUDP[x]
), then that client
is immediately disconnected and the
UDPCtrlCfgErrCnt
is incremented in PMU
Diagnostics on LHMI at
Main menu/Diagnostics/Communication/PMU diagnostics/
PMUSTATUS:1
Even if the parameter
SendDataUDP[x]
is set to
Disable
it is still possible for the clients
to connect on the TCP port and request the configuration frames.
Section 6
1MRK 511 365-UUS A
Wide area measurement system
106
Phasor measurement unit RES670 2.1 ANSI
Technical manual
Содержание Relion 670 Series RES670
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