C8-7
IM 34M06H62-02E 2nd Edition : June 2008-00
C8.3 Alarm Delay Timer
The alarm delay timer function delays the generation of an alarm. The alarm turns on
only if the alarm condition persists until a delay timer times out.
If an alarm condition disappears before a delay timer times out, the timer resets.
Changing the alarm type or powering down also resets the delay timer.
Figure C8.3 Alarm Delay Timer
C8.4 Selecting Alarm Preset Values
There is a set of four alarm preset values A1 to A4, which can be selected by setting the
SP Number (SPNO) parameter. Changing the SP Number changes all the alarm preset
values at the same time. For details on SP number selection, see Section C6.9.1, "SP
Number Selection."
Table C8.6 Selection of Alarm Preset Values
SP number (SPNO)
vailable Alarm
Preset Values
1 1.A1, 1.A2, 1.A3, 1.A4
2 2.A1, 2.A2, 2.A3, 2.A4
3 3.A1, 3.A2, 3.A3, 3.A4
4 4.A1, 4.A2, 4.A3, 4.A4
TIP
- Changing the SPNO parameter does not affect alarm type, alarm hysteresis, or alarm delay timer.
- Alarm preset values are always switched as a set of 4. Switching to an individual alarm preset value,
not in a set, is not allowed.
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