• LINKUP indicates the Ethernet link status
• WARNING indicates that communication (frame rate) is higher than normal
• ALARM indicates that the IED limits communication
4.15.3  Function blocks
DOSFRNT
LINKUP
WARNING
ALARM
IEC09000749-1-en.vsd
IEC09000749 V1 EN
Figure 43: DOSFRNT function block
DOSOEMAB
LINKUP
WARNING
ALARM
IEC09000750-1-en.vsd
IEC09000750 V1 EN
Figure 44: DOSOEMAB function block
DOSOEMCD
LINKUP
WARNING
ALARM
IEC09000751-1-en.vsd
IEC09000751 V1 EN
Figure 45: DOSOEMCD function block
4.15.4  Signals
Table 57: DOSFRNT Output signals
Name
Type Description
LINKUP BOOLEAN Ethernet link status
WARNING BOOLEAN Frame rate is higher than normal state
ALARM BOOLEAN Frame rate is higher than throttle state
Section 4 1MRK505222-UUS C
Basic IED functions
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Technical reference manual