Alarms; Alarm Indication - ero electronic ELK Guía Del Usario

4.3. Alarms

Up to four process alarms may be configured using
the Quick Start Codes section 3.1. Each alarm can
be configured for:-
Full Scale Low The alarm is shown if the process
value falls below a set threshold
Full Scale High The alarm is shown if the process
value rises above a set threshold
Deviation Low The alarm is shown if the process
value deviates below the setpoint
by a set threshold
Deviation High The alarm is shown if the process
value deviates above the setpoint
by a set threshold
Deviation Band The alarm is shown if the process
value deviates above and below
the setpoint by a set threshold
If an alarm is not configured it is not shown in the
list of level 2 parameters, section 4.2.1.
Additional alarm messages may be shown such as
CONTROL LOOP BROKEN. This occurs if the
controller does not detect a change in process value
40
following a change in output demand after a
suitable delay time. Another alarm message may
be INPUT SENSOR BROKEN (SBr). This
occurs if the sensor becomes open circuit; the
output level will adopt a 'SAFE' value which can
be set up in Operator Level 2, see section 4.3.
4.3.1.

Alarm Indication

If an alarm occurs, the red ALM beacon will flash.
A scrolling text message will describe the source of
the alarm. Any output attached to the alarm will
operate. An alarm relay can be configured using
the Quick Start Codes to be energised or de-
energised in the alarm condition. It is normal to
configure the relay to be de-energised in alarm so
that an alarm is indicated if power to the controller
fails.
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Press and (ACK) together to
acknowledge the alarm
If the alarm is still present the ALM beacon will
light continuously otherwise it will go OFF.
By default alarms are configured as non-latching,
de-energised in alarm. If you require latched
alarms, please refer to the engineering handbook.
Part number HA028438. Issue 3.0. Oct-05