5.2.11 Alarms
Up to three alarms can be configured. They are used to detect out of range values.
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P21 |
Select P21 to configure Alarm 1 Type. P21 is always available. |
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For further details see section 4.3 ‘Alarms’. |
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nonE |
Alarm not configured (factory default) |
d.Hi |
Deviation high |
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Hi |
Full scale high |
d.Lo |
Deviation low |
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Lo |
Full scale low |
bnd |
Deviation band |
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P22 |
Select P22 to configure Alarm 1 latching type. P22 is not shown if P21 = none. |
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See section 4.3.5. |
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nonE |
Non latching (factory default).
A non latching alarm will reset itself when the alarm condition is removed. If it is still present when acknowledged the ALM beacon illuminates constantly, the flashing alarm messages remain and the output remains active. |
Auto |
Latching with automatic reset.
An auto latching alarm requires acknowledgement before it is reset. The acknowledgement can occur BEFORE the condition causing the alarm is removed. |
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Nan |
Latching manual reset
The alarm continues to be active until both the alarm condition is removed AND the alarm is acknowledged. The acknowledgement can only occur AFTER the condition causing the alarm is removed. |
no.AL |
Non latching no ALM message.
If an alarm occurs, any output attached to the alarm will operate and the corresponding beacon on the controller display will illuminate. No alarm message will be flashed in the display. |
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P23 |
Select P23 to configure Alarm 1 as a Blocking Alarm. P23 is not shown if P21 = none.
Alarm Blocking is used to prevent alarms from activating during start-up. In some applications, the measurement at start-up is in an alarm condition until the system has come under control. Blocking causes the alarms to be ignored until the system is under control (in the safe state), after this any deviations trigger the alarm. |
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See section 4.3.6 |
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no |
Alarm 1 operates as a normal alarm (no blocking) (factory default) |
Yes |
Alarm 1 is a blocking alarm |
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P24 |
Select P24 to configure Alarm 2 Type. P24 is always available. |
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See section 4.3. |
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nonE |
Alarm not configured |
d.Hi |
Deviation high |
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Hi |
Full scale high (factory default) |
In FM approved versions 816L, 808L and 804L, only Hi and Lo options are available. |
d.Lo |
Deviation low |
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Lo |
Full scale low |
bnd |
Deviation band |
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P25 |
Select P25 to configure Alarm 2 latching type. P25 is not shown if P24 = none. |
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See section 4.3.5 |
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nonE |
Non latching (factory default) |
Auto |
Latching with automatic reset |
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Nan |
Latching manual reset |
In FM approved versions 816L, 808L and 804L, only manual latching is available. |
no.AL |
Non latching no ALM indication |
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P26 |
Select P26 to configure Alarm 2 as a Blocking Alarm. P26 is not shown if P24 = none. |
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See section 4.3.6 |
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No |
Alarm 2 operates as a normal alarm (no blocking) (default) |
In FM approved versions 816L, 808L and 804L blocking alarms are not available. |
Yes |
Alarm 2 is a blocking alarm |
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P27 |
Select P27 to configure Alarm 3 Type. |
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See section 4.3. |
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nonE |
Alarm not configured (factory default) |
d.Hi |
Deviation high |
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Hi |
Full scale high |
d.Lo |
Deviation low |
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Lo |
Full scale low |
bnd |
Deviation band |
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P28 |
Select P28 to configure Alarm 3 Latching Type. P28 is not shown if P27 = none. |
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See section 4.3.5 |
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nonE |
Non latching (factory default) |
Auto |
Latching with automatic reset |
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Nan |
Latching manual reset |
no.AL |
Non latching no ALM indication |
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P29 |
Select P29 to configure Alarm 3 as a Blocking Alarm. P29 is not shown if P27 = none. |
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See section 4.3.6 |
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No |
Alarm 3 operates as a normal alarm (no blocking) (factory default) |
Yes |
Alarm 3 is a blocking alarm |
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