Hitachi WJ Series

Chapter 9 Inverter Functions
9-11-11
■ Window comparator operation example 1: When [b070]/[b071] is set to "no (Disable)"
 If the "[Ai1] operation set level at disconnection or compare event [b070]" or "[Ai2] operation set
level at disconnection or compare event [b071]" is set to "No (Disabled)", the [WCAi1] or
[WCAi2] ([Ai1Dc] or [Ai2Dc]) signal is output when the analog input value is within the window
comparator upper and lower limit range.
■ Window comparator operation example 2: Example of disconnection detection
 If the lower limit, upper limit, and operation set level at disconnection or compare event are set
as shown in the figure below, the analog disconnection detection signal turns on when the
analog input reaches the minimum value due to disconnection, and the operation set level at
disconnection or compare event will be used as the analog input value instead of the actual
analog input value.
■ Window comparator operation example 3: Example of short-circuit detection
 If the lower limit, upper limit, and operation set level at disconnection or compare event are set
as shown in the figure below, the analog disconnection detection signal turns on when the
analog input reaches the maximum value due to a short circuit, and the operation set level at
disconnection or compare event will be used as the analog input value instead of the actual
analog input value.
[WCAi1]/[WCAi2]
([Ai1Dc]/[Ai2Dc])
Max(100%)
Min(Ai1/Ai2:0%)
Window comparator upper limit
[b060] or [b063]
Window comparator lower limit
[b061] or [b064]
Hysteresis width
[b062]/[b065]
Ai1 or Ai2 input
Analog input value
ON
ON
ON
Max(100%)
Min(Ai1/Ai2:0%)
Ai1 or Ai2 input
Analog input value used
Operation set level at
disconnection or compare event
[b070]/[b071]
Window comparator upper
limit [b060] or [b063]
Window comparator lower
limit [b061] or [b064]
Hysteresis width
[b062]/[b065]
[WCAi1]/[WCAi2]
([Ai1Dc]/[Ai2Dc])
Analog input value
Disconnection
ON
Max(100%)
Min(Ai1/Ai2:0%)
Ai1 or Ai2 input
Analog input value used
Operation set level at
disconnection or compare event
[b070]/[b071]
Window comparator upper
limit [b060] or [b063]
Window comparator lower
limit [b061] or [b064]
Hysteresis width
[b062]/[b065]
[WCAi1]/[WCAi2]
([Ai1Dc]/[Ai2Dc])
Short-circuit ↓
ON
Analog input value