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•
SNTP
•
IRIG-B
Do not use the MicroSCADA OPC server as a time synchronization
source.
3.16.10
Technical data
Table 71:
Time synchronization, time tagging
Function
Value
Time tagging resolution, events and sampled measurement values
1 ms
3.17
Denial of service
3.17.1
Functionality
The Denial of service functions (DOSLAN1 and DOSFRNT) are designed to limit
overload on the IED produced by heavy Ethernet network traffic. The communication
facilities must not be allowed to compromise the primary functionality of the device.
All inbound network traffic is quota controlled so that too heavy network loads can be
controlled. Heavy network load might for instance be the result of malfunctioning
equipment connected to the network.
3.17.2
Denial of service, frame rate control for front port DOSFRNT
3.17.2.1
Function block
DOSFRNT
LINKUP
WARNING
ALARM
IEC09000133-1-en.vsd
IEC09000133 V1 EN
Figure 54:
Function block
Section 3
1MRS757256 F
Basic functions
106
PML630/Compact Load-Shedding Solution
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