SJ700
2
Inverter
Oper
ati
ons
and Monitor
ing
4–55
Analog
Disconnect
Detection
The analog disconnect detection is useful when the inverter receives a speed reference from an
external device. Upon input signal loss at either the [O], [OI], or [O2] terminal, the inverter
normally just decelerates the motor to a stop. However, the inverter can use the intelligent
output terminals [ODc], [OIdc], or [O2dc] to signal other machinery that a signal loss has
occurred.
Each analog disconnect output has independent thresholds, set by B070, B071, and B072.
When the input is below the set threshold value, the inverter substitutes the threshold value for
the input. Related parameters are given in the following tables.
The inverter can also detect when an analog input value is within a range (or
window
) of values.
See
“Window Comparator Signals” on page 4–62
.
Opt. Code
and
Symbol
27=[Odc]
28=[OIdc]
29=[O2dc]
Valid for
Outputs
[11 to [15],
[ALx]
Required
Settings
B070, B071,
B072
Default
terminal
Requires
config.
Opt.
Code
Symbol
Function Name
27
Odc
Analog [O] disconnect detect
28
OIdc
Analog [OI] disconnect detect
29
O2dc
Analog [O2] disconnect detect
Code
Function
Data or Range
Description
B070
[O] input disconnect
threshold
0 to 100%
If [O] value < B070, turn ON [Odc];
substitute B070 value for [O] input
no (255)
Ignore B070 setting
B071
[OI] input disconnect
threshold
0 to 100%
If [OI] value < B071, turn ON [Odc];
substitute B071 value for [OI] input
no (255)
Ignore B071 setting
B072
[O2] input disconnect
threshold
0 to 100%
If [O2] value < B072, turn ON [Odc];
substitute B072 value for [O2] input
no (255)
Ignore B072 setting
[O], [OI], or [O2]
t
0
Value applied to input
t
B070
B071 B072
[Odc], [OIdc], or [O2dc]
