All the frames (the header frame, configuration frame, command frame and dataframe) are communicated over the same TCP port. The client can request (by sendinga command frame) a configuration and/or header via the TCP channel and therequested configuration and/or header will be sent back to the client (as Configurationframe/Header frame) over the same TCP channel.Once the TCP client connects to the IED, the client has to necessarily send a commandframe to start a communication. As shown in Figure 38, the IED can support 2PMUREPORT instances and the client has to specify the PMU ID Code in order toknow which PMUREPORT data needs to be sent out to that client. In this figure, X andY are referring to the user-defined PMU ID Codes for PMUREPORT instances 1 or2, respectively. It is up to the TCP client to decide which PMUREPORT functionblock shall communicate with that client. Upon successful reception of the firstcommand by the IED, the PMU ID will be extracted out of the command; if there isa PMUREPORT instance configured in the IED with matching PMU ID, then theclient connection over TCP with the IED will be established and furthercommunication will take place. Otherwise, the connection will be terminated and theTCPCtrlCfgErrCnt is incremented in the PMU Diagnostics on the Local HMI underMain menu/Diagnostics/Communication/PMU diagnostics/PMUSTATUS:1It is possible to turn off/on the TCP data communication by sending a IEEE1344 orC37.118 command frame remotely from the client to the PMU containing RTDOFF/RTDON command.At any given point of time maximum of 8 TCP clients can be connected to the IED forIEEE1344/C37.118 protocol. If there is an attempt made by the 9th client, theconnection to the new client will be terminated without influencing the connection ofthe other clients already connected. A list of active clients can be seen on the LocalHMI in the diagnostics menu under Main menu/Diagnostics/Communication/PMU diagnostics/PMUSTATUS:16.1.3.2 Short guidance for use of UDPThe IED supports maximum of 6 concurrent UDP streams. They can be individuallyconfigured 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 clientgroup) and is a number between 1 and 6. Each of the 6 UDP groups in the IED has thefollowing settings:1. SendDataUDP[x] – Enable / disable UDP data stream2. ProtocolOnUDP[x] – Send IEEE1344 or C37.118 on UDP3. PMUReportUDP[x] – Instance number of PMUREPORT function block thatmust send data on this UDP stream (UDP client group[x])4. UDPDestAddres[x] – UDP destination address for UDP client group[x] (unicast /multicast address range)1MRK 502 071-UEN - Section 6Wide area measurement systemGenerator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 105Application manual
