You can configure up to three horn output functions, and the parameter settings for each of these functions. By adjusting the
parameters, each horn output function can be configured as one of four different types of horn output:
•
Simple horn
•
Simple horn with acknowledgement
•
Siren
•
Siren with acknowledgement
The horn outputs are only activated when an alarm condition becomes active in the system.
An operator can silence the horn output by pressing
Horn silence
on the display unit.
More information
See
Alarms
,
Horn outputs
,
Silencing alarms
for more information.
Output
Assign the horn output function under
Configure > Input/output
. Select the hardware module, then select the output to configure.
Table 4.10
Hardware required in addition to the minimum standard controller wiring
Function
I/O
Type
Details
Local > Alarm horn > Horn #,
where # is 1 to 3
Digital output
Continuous (performance
depends on the output
parameter)
The controller activates the horn output based on
whether alarms are active and/or acknowledged,
according to the selected parameters.
Parameters
Configure the horn output parameters under
Configure > Parameters > Local > Alarm horn > Horn #
.
Table 4.11
Default horn output parameters
Parameter
Range
Default
Notes
Reset when new alarm
Not enabled,
Enabled
Not enabled
Not enabled
: New alarms have no effect on the horn output.
Enabled
: When a new alarm is activated, then the timers for
Minimum down time
and
Minimum up time
restart. This gives a
wailing effect for new alarms.
Minimum down time
0 s to 1 h
1 s
Only relevant if
Reset when new alarm
is
Enabled
. See the
examples for more information.
Minimum up time
0 s to 1 h
10 s
Only relevant if
Reset when new alarm
is
Enabled
. See the
examples for more information.
De-energise when all
alarms are
acknowledged
Not enabled,
Enabled
Not enabled
Not enabled
: Alarm acknowledgement has no effect on the horn
output.
Enabled
: When all active alarms are acknowledged, then the horn
output is deactivated.
Simple horn
The horn output is activated when one or more alarms are active.
The horn output is deactivated when there are no active alarms.
DESIGNER'S HANDBOOK 4189340911K UK
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