Hitachi WJ200-001S Instruction Manual page 266

Alarm Signal
The inverter alarm signal is active when a fault has
occurred and it is in the Trip Mode (refer to the
diagram at right). When the fault is cleared the
alarm signal becomes inactive.
We must make a distinction between the alarm
signal
AL and the alarm relay
and [AL2]. The signal AL is a logic function, which
you can assign to the open collector output terminals
[11], [12], or the relay outputs.
The most common (and default) use of the relay is for AL, thus the labeling of its
terminals. Use an open collector output (terminal [11] or [12]) for a low-current logic
signal interface or to energize a small relay (50 mA maximum). Use the relay output to
interface to higher voltage and current devices (10 mA minimum).
Option Terminal
Code Symbol

AL Alarm Signal
11, 12, AL0 – AL2
Valid for inputs:
, ,
Required settings
Notes:
 By default, the relay is configured as normally
closed (=). Refer to the next page for an
explanation.
 In the default relay configuration, an inverter
power loss turns ON the alarm output. the alarm
signal remains ON as long as the external control
circuit has power.
 When the relay output is set to normally closed, a
time delay of less than 2 seconds occurs after
powerup before the contact is closed.
 Terminals [11] and [12] are open collector outputs,
so the electric specifications of [AL] are different
from the contact output terminals [AL0], [AL1],
[AL2].
 This signal output has the delay time (300 ms
nominal) from the fault alarm output.
 The relay contact specifications are in
Logic Signal Specifications" on page 4–6.
contact diagrams for different conditions are on
the next page.
contacts
Function Name State
ON
OFF

"Control
The
Run
[AL0], [AL1]
Fault
Description
when an alarm signal has occurred and has not
been cleared
when no alarm has occurred since the last clearing
of alarm(s)
Example for terminal [11] (default output
configuration shown – see
Inverter output
terminal circuit
CM2
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration – see
Inverter logic
circuit board
AL0
Power
supply
See I/O specs on page 4-6
459
STOP
RESET
Stop
RUN
STOP
RESET
Trip
Fault
Alarm signal active
page 3-89):
AL
11
RY
page 4-51 and 3-91):
AL
AL1 AL2
Load