Hitachi WJ200-001L, Instruction Manual

Page: 266 / 680

4

59
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
contacts
[AL0], [AL1]
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
Code
Terminal
Symbol
Function Name State Description

AL Alarm Signal ON when an alarm signal has occurred and has not
been cleared
OFF when no alarm has occurred since the last clearing
of alarm(s)
Valid for inputs: 11, 12, AL0
– AL2
Example for terminal [11] (default output
configuration shown
– see
page 3-89 ):
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration
– see
page 4-51 and 3-91 ):
See I/O specs on
page 4-6
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
“Control
Logic Signal Specifications” on page 4–6.
The
contact diagrams for different conditions are on
the next page.
Run Stop
RUN
STOP
RESET
Trip
STOP
RESET
Fault
Fault
Alarm signal active
RY
Inverter output
terminal circuit
CM2 11
AL
AL1
Power
supply
Load
AL0 AL2
Inverter logic
circuit board AL