Group Alarm Reflash Signals - ABB SACO 16D3 User Manual And Technical Description

Group alarm reflash
signals
Each alarm channel generates two reflash output
signals, A and B, which can be freely linked to the
two reflash output relays to form two group alarm
reflash functions. The two group alarm reflash
output relays can be given one of the following
modes of operation selectable by programming,
separately for both of the output relays:
0 = FCFR, Field Contact Following Reflash
1 = AACR, Acknowledge Action Controlled
Reflash
Channel input delays
Fig. 11. Principle diagram for the different reflash signal types. The alarm signals 1 and 2 are grouped
to the same group alarm reflash signal.
NOTE! The reflash signals are always accompa-
nied by a certain basic delay. The basic delay
time depends on the number of incoming alarm
signals per time unit and on the number of
2 = ISR, Impulse Shaping Reflash
3 = FCFR + ISR, Field Contact Following
Reflash with a 300 ms interruption of the
reflash signal any time a new alarm signal
joins in an already active group alarm bunch
4 = FCFR + AACR, Field Contact Following
Reflash and Action Controlled Reflash (se
figure below)
Channel reset delay
Alarm 1
Alarm 2
Acknowledge
Signal following
Alarm memory following
Pulse type
Signal following with break
FCFR + AACR
internal interlocking levels in use. The basic
time delay of the reflash signal is 70 ms if only
one alarm signal is received within a time period
of 200 ms and if no interlockings are used.
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