4–22

Using Intelligent Output Terminals

Monitoring

Alarm Signal

The inverter alarm signal is active when a fault has

 

occurred and it is in the Trip Mode (refer to the

 

STOP

 

 

 

RESET

Stop

 

diagram at right). When the fault is cleared the

Run

 

 

RUN

 

alarm signal becomes inactive.

 

 

 

 

 

 

 

 

STOP

 

 

 

 

 

 

We must make a distinction between the alarm

 

 

 

Fault

RESET

 

 

 

signal [AL] and the alarm relay contacts AL0, AL1

 

Trip

Fault

 

and AL2. The signal [AL] is a logic function which

 

 

Alarm signal

 

you can assign to the open collector output termi-

 

 

 

 

 

active

 

nals 11, or 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

Function Name

Output

 

 

Description

 

Code

Symbol

State

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

05

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 outputs:

11, 12, AL0 – AL2

Example for terminal 11 or 12:

Required settings:

C33

Inverter output

 

AL

Notes:

 

terminal circuit

 

 

 

 

 

 

 

 

 

When the alarm output is set to normally closed, a

 

 

 

 

 

 

time delay occurs until the contact is closed when

H

O

OI

L

FM CM2 12 11

the power is turned on. Therefore, when the alarm

 

 

 

 

 

 

contact output is to be used, set a delay of about 2

 

 

 

 

 

 

seconds when the power is turned on.

 

 

 

 

+

RY

Terminals 11 and 12 are open collector outputs, so

 

 

 

 

 

 

 

 

 

 

 

 

 

the electric specification of [AL] is different from

 

 

 

 

 

 

the contact output terminals AL0, AL1, AL2.

 

 

 

 

 

 

The logic sequence of terminals 11 and 12 is the

Example for terminals AL0, AL1, AL2:

Operations and

same as AL0-AL2.

inverter logic

AL

 

 

 

See the description of AL1, AL2, and AL0.

circuit board

 

 

 

 

 

 

 

When the inverter power supply is turned off, the

 

 

 

 

 

alarm signal output is valid as long as the external

Connector

AL0

AL1

AL2

control circuit has power.

 

 

 

 

 

This signal output has the delay time (300ms

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay position shown is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power

 

 

 

 

 

 

 

 

nominal) from the fault alarm output.

 

 

Load

 

during normal running

 

Supply

 

 

 

 

 

 

 

 

 

 

 

 

 

(no alarm).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

See I/O specs on page 4–5.

 

 

 

 

 

 

NOTE: The relay contact specifications are in the connector input/output specifications on page 4–5. The contact diagrams for different conditions are on the next page.

Page 113
Image 113
Hitachi L100 Alarm Signal, Stop, Diagram at right. When the fault is cleared Run, Alarm signal becomes inactive

L100 specifications

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