The sampling latency S
d
is calculated for each telegram on both ends. The
algorithm assumes that the one-way propagation delay P
d
is equal for both
directions.
The echo method without GPS can be used in telecommunication transmission
networks as long as delay symmetry exists, that is, the sending and receiving delays
are equal.
6.4.6 Signals
6.4.6.1 PCSITPC Output signals
Table 1270: PCSITPC Output signals
Name Type Description
OK BOOLEAN Protection communication ok
WARNING BOOLEAN Protection communication
warning
ALARM BOOLEAN Protection communication
alarm
COMM BOOLEAN Communication detected, ac-
tive when data is received
6.4.7 PCSITPC Settings
Table 1271: PCSITPC Non group settings (Advanced)
Parameter Values (Range) Unit Step Default Description
Reset delay time 100...300000 ms 10 1000 Reset delay time
from alarm and
warning into ok
state
Alarm count 0...99999 1 0 Set new alarm
count value
Warning count 0...99999 1 0 Set new warning
count value
6.4.8 PCSITPC Monitored data
Table 1272: PCSITPC Monitored data
Name Type Values (Range) Unit Description
HEALTH Enum
1=Ok
2=Warning
3=Alarm
-2=Waiting
Communication link
health
ALARM_CNT INT32 0...99999 Number of alarms de-
tected
Table continues on the next page
Supervision functions 1MRS759142 F
1330 REX640
Technical Manual
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