Alarm Signal - Hitachi WJ200 Series Instruction Manual

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
05
11, 12, AL0 – AL2
Valid for inputs:
C031, C032,
Required settings
Notes:
• By default, the relay is configured as normally
closed (C036=01). 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
C036
"Control
The
Run
Fault
[AL0], [AL1]
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 3-90):
AL
11
RY
page 4-52 and 3-90):
AL
AL1 AL2
Load