ABB ACS 160, Руководство пользователя

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84 ACS 160 User’s Manual
Figure 20 Operating data supervision using relay outputs, when
LOW>HIGH.
LOW (3202)
HI (3203)
energised=1
de-energised=0
energised=1
de-energised=0
A
B
Value of supervised parameter
t
A = Parameter 1401
RELAY OUTPUT
1 (1402
RELAY OUTPUT
2) value is
SUPRV
1
OVER
or
SUPRV
2
OVER
.
B = Parameter 1401
RELAY OUTPUT
1 (1402
RELAY OUTPUT
2) value is
SUPRV
1
UNDER
or
SUPRV
2
UNDER
.
Note! Case LOW>HIGH represents a special hysteresis with two separate
supervision limits. Depending on whether the supervised signal has gone
below value HIGH (3203) or above value LOW (3202), determines which
limit is being used. Initially HIGH is used, until the signal goes above value
LOW. After this the limit used is LOW, until the signal goes back below value
HIGH.
A = Initially the relay is de-energised.
B = Initially the relay is energised.