Alarm Signal - Hitachi CP-X200 Instruction Manual

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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
and [AL2]. The signal AL is a logic function, which
you can assign to the open collector output terminal
[11] 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]) 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
05 AL
Valid for inputs:
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.
Terminal [11] is an open collector output, 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.
AL and the alarm relay
Function Name
Alarm Signal
11, AL0 – AL2
C026, C036
contacts
[AL0], [AL1]
State
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)
Example for terminal [11] (default output
configuration shown – see
Inverter output
terminal circuit
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration – see
Inverter logic
circuit board
"Control
The
See I/O specs on
STOP
RESET
Run
RUN
STOP
RESET
Trip
Fault
Alarm signal active
Description
page 3-54):
AL
CM2 11
RY
page 4-35 and
AL
AL0 AL1 AL2
Power
Load
supply
page 4-6
Stop
Fault
3-54):