Hitachi SJ7002 Series Instruction Manual page 217

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