Siemens SIPROTEC 5 Manual page 163

The configuration dataset is transmitted 1x per minute. With the Reporting Rate parameter, you set the
number of cyclic repetitions of the data packages. As UDP is a connectionless protocol, a preconfigured desti-
nation device with its PDC/IP address is not required to be physically present and/or connected. This allows
uninterrupted provision of the data without bidirectional communication.
NOTE
i i
If you have not configured valid PDC/IP addresses and still activate option for spontaneous data transmis-
sion, no cyclic data telegrams are sent.
NOTE
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It is possible to configure IP addresses for various PDCs that are not in the same subnetwork as the COM
module. Such configurations are considered valid and may be loaded into the device. However, if the
device transmits spontaneous data and configuration packages to these IP addresses, the PDC with the
deviating subnetwork destination address cannot be reached.
EXAMPLE
COM-Module Address Configuration
•
IP address: 192.168.100.1
•
Subnet mask: 255.255.255.0
PDC Address Configuration
•
IP address for PDC1: 192.168.100.160
•
IP address for PDC2: 86.168.100.161
Only PDC1 receives the data because the IP address is in the same subnetwork as that of the COM module.
PDC2 cannot be reached because the subnetwork address (86.x) differs from the subnetwork address of the
COM module (192.x). The PMU cannot transmit data to this address.
Measuring-Point Assignment
After adding measuring points to the device, you can assign these measuring points to each configured PMU.
Figure 6-22 shows an example expansion of the device configuration by 2 additional input/output modules.
You connect the current and voltage inputs of these I/O modules to measuring points via the DIGSI routing
matrix, see example in
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Figure 6-23.
6.4 Function-Group Type Phasor Measurement Unit (PMU)
Function-Group Types
163