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Ascon Tecnologic - KM5P Line - ENGINEERING MANUAL - PAG. 13
[41] HAL2 - Alarm 2 hysteresis
Available:
When [36] AL2t is different to
nonE
or [36] AL2t
is different from
SE.br
.
Range:
1... 9999 engineering units.
Note:
For other details see [33] HAL1 parameter.
[42] AL2d - Alarm 2 delay
Available:
When [36] AL2t different form
nonE
.
Range:
From oFF (0) to 9999 seconds.
Note:
The alarm goes ON only when the alarm condition
persist for a time longer than [42] AL2d time but the
reset is immediate.
[43] AL2o - Alarm 2 enabling during Stand-by mode
and out of range indications
Available:
When [36] AL2t different from
nonE
.
Range:
0 Never;
1 During stand by;
2 During overrange and underrange;
3 During overrange, underrange and stand-by.
]
AL3 Group - Alarm 3 parameters
[44] AL3t - Alarm 3 type
Available:
Always.
Range: •
When one or more outputs are programmed as
control output:
nonE
Alarm not used;
LoAb
Absolute low alarm;
HiAb
Absolute high alarm;
LHAo
Absolute band alarm with alarm indication
out of the band;
LHAi
Absolute band alarm with alarm indication
inside the band;
SE.br
Sensor break;
LodE
Deviation low alarm (relative);
HidE
Deviation high alarm (relative);
LHdo
Relative band alarm with alarm indication
out of the band;
LHdi
Relative band alarm with alarm indication
inside the band;
• When no output is programmed as control output:
nonE
Alarm not used;
LoAb
Absolute low alarm;
HiAb
Absolute high alarm;
LHAo
Absolute band alarm with alarm indication
out of the band;
LHAi
Absolute band alarm with alarm indication
inside the band;
SE.br
Sensor break.
Note:
The relative alarm are “relative” to the current set point
(this may be different to the Target set point if you are
using the ramp to set point function).
[45] Ab3 - Alarm 3 function
Available:
When [43] AL3t is different from
nonE
.
Range:
0... 15 with the following rule:
+1 Not active at power up.
+2 Latched alarm (manual reset)
+4 Acknowledgeable alarm
+8 Relative alarm not active at set point change
Example:
Setting Ad3 equal to 5 (1+4) the alarm 3 will be
“
Not active at power up
” and “
Acknowledgeable
”.
Note:
For other details see [29] Ab1 parameter.
[46] AL3L - For High and low alarms, it is the low
limit of the AL3 threshold
- For band alarm is low alarm threshold
Available:
When [44] AL3t is different from
nonE
or [44]
AL3t is different from
SE.br
.
Range:
-1999 to [47] AL3H engineering units.
[47] AL3H - For High and low alarms, it is the high
limit of the AL3 threshold
- For band alarm is high alarm threshold
Available:
When [44] AL3t is different from
nonE
or [44]
AL3t is different from
SE.br
.
Range:
From [46] AL3L to 9999 engineering units.
[48] AL3 - Alarm 3 threshold
Available:
When:
• [44] AL3t = LoAb Absolute low alarm;
• [44] AL3t = HiAb Absolute high alarm;
• [44] AL3t = LodE Deviation low alarm (relative);
• [44] AL3t = HidE Deviation high alarm (relative).
Range:
From [46] AL3L to [47] AL3H engineering units.
[49] HAL3 - Alarm 3 hysteresis
Available:
When [44] AL3t is different to
nonE
or [44] AL3t
is different from
SE.br
.
Range:
1... 9999 engineering units.
Note:
For other details see [32] HAL1 parameter.
[50] AL3d - Alarm 3 delay
Available:
When [44] AL3t different form
nonE
.
Range:
From oFF (0) to 9999 seconds.
Note:
The alarm goes ON only when the alarm condition
persist for a time longer than [50] AL3d time but the
reset is immediate.
[51] AL3o - Alarm 3 enabling during Stand-by mode
and out of range indications
Available:
When [44] AL3t is different from
nonE
or [44]
AL3t is different from
SE.br
.
Range:
0 Never;
1 During stand by;
2 During overrange and underrange;
3 During overrange, underrange and stand-by.
]
LbA group - Loop break alarm
General note about LBA alarm
The LBA operate as follows: applying the 100% of the power
output to a process, the process variable, after a time due to
the process inertia, begins to change in a known direction (in-
creases for an heating action or decreases for a cooling action).
Example:
If I apply 100% of the power output to a furnace,
the temperature must go up unless one of the component in
the loop is faulty (heater, sensor, power supply, fuse, etc...)
The same philosophy can be applied to the minimum power.
In our example, when I turn OFF the power to a furnace, the
temperature must go down, if not the SSR is in short circuit,
the valve is jammed, etc..
LBA function is automatically enabled when the PID requires
the maximum or the minimum power.
When the process response is slower than the programmed
limit the instrument generates an alarm.
Notes: 1.
When the instrument is in manual mode, the LBA
function is disabled.