Ascon Tecnologic - K Series - ENGINEERING MANUAL - Vr. 9.0
PAG. 11
[29] HAL1 - Alarm 1 hysteresis
Available:
When [24] AL1t is different from
nonE
or
[24] AL1t is different from
SE.br
.
Range:
1... 9999 engineering units.
Notes: 1.
The hysteresis value is the difference between
the Alarm threshold value and the point the where
the Alarm automatically resets.
2.
When the alarm threshold plus or minus the
hysteresis is out from the input range, the
instrument will not be able to reset the alarm.
Example:
Input range from 0 to 1000 (mBar);
- Set point equal to 900 (mBar);
- Deviation low alarm equal to 50 (mBar);
- Hysteresis equal to 160 (mBar);
the theoretical reset point is 900 - 50 + 160 =
1010 (mBar) but this value is out of range.
The reset can be made only by turning the instru-
ment
OFF
, removing the condition wich generated
the alarm and turning the instrument ON again.
3.
All band alarms use the same hysteresis value
for both thresholds.
4.
When the hysteresis of a band alarm is bigger
than the programmed band, the instrument will
not be able to reset the alarm.
Example:
Input range 0... 500 (°C);
- Set point equal to 250 (°C);
- Relative band alarm;
- Low threshold equal to 10 (°C);
- High threshold equal to 10 (°C);
- Hysteresis equal to 25 (°C).
[30] AL1d - Alarm 1 delay
Available:
When [24] AL1t is different form
nonE
.
Range:
From oFF (0) to 9999 seconds.
Note:
The alarm goes ON only when the alarm condition
persists for a time longer than [30] AL1d time but the
reset is immediate.
[31] AL1o - Alarm 1 enabling during Stand-by mode
and out of range indications
Available:
When [24] AL1t is different from
nonE
.
Range:
0 =
Never;
1 =
During stand by;
2 =
During overrange and underrange;
3 =
During overrange, underrange and stand-by.
]
AL2 Group - Alarm 2 parameters
[32] AL2t - Alarm 2 type
Available:
Aways.
Range: •
When one or more outputs are programmed as
control output:
nonE = Alarm not used;
LoAb = Absolute low alarm;
HiAb = Absolute high alarm:
LHAb = Absolute band alarm:
SE.br = Sensor break;
LodE = Deviation low alarm (relative);
HidE = Deviation high alarm (relative);
LHdE = Relative band alarm.
•
When no output is programmed as control output:
nonE = Alarm not used;
LoAb = Absolute low alarm;
HiAb = Absolute high alarm;
LHAb = Absolute band alarm;
SE.br = Sensor break.
Note:
The relative alarm are “relative” to the current set point
(this may be different from the Target setpoint if you
are using the ramp to set point function).
[33] Ab2 - Alarm 2 function
Available:
When [32] AL2t is different from
nonE
.
Range:
0... 15 with the following rule:
+1 =
Not active at Power ON;
+2 =
Latched alarm (manual reset);
+4 =
Acknowledgeable alarm.
+8 =
Relative alarm not active at set point change.
Example:
Setting Ad2 equal to 5 (1 + 4) the alarm 2 will be
“Not active at Power ON” and “Acknowledgeable”.
Note:
For other details see [25] Ab1 parameter.
[34] AL2L - For High and low alarms, it is the low
limit of the AL2 threshold
- For band alarm, it is low alarm threshold
Available:
When [32] AL2t is different from
nonE
or
[32] AL2t is different from
SE.br
.
Range:
From - 1999 to [35] AL2H engineering units.
[35] AL2H - For High and low alarms, it is the high
limit of the AL2 threshold
- For band alarm, it is high alarm threshold
Available:
When [32] AL2t is different from
nonE
or
[32] AL2t is different from
SE.br
.
Range:
From [34] AL2L to 9999 engineering units.
[36] AL2 - Alarm 2 threshold
Available:
When:
- [32] AL2t = LoAb Absolute low alarm;
- [32] AL2t = HiAb Absolute high alarm;
- [32] AL2t = LodE Deviation low alarm (relative);
- [32] AL2t = LidE Deviation high alarm (relative);
Range:
From [34] AL2L to [35] AL2H engineering units.
[37] HAL2 - Alarm 2 hysteresis
Available:
When [32] AL2t is different from
nonE
or
[32] AL2t is different from
SE.br
.
Range:
1... 9999 engineering units.
Note:
For other details see [29] HAL1 parameter.
[38] AL2d - Alarm 2 delay
Available:
When [32] AL2t is 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 [38] AL2d time but the
reset is immediate.
[39] AL2o - Alarm 2 enabling during Stand-by mode
and out of range indications
Available:
When [32] AL2t is 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
[40] AL3t - Alarm 3 type
Available:
Always.
Range: •
When one or more outputs are programmed as
control output:
nonE = Alarm not used;
