Tempco TEC-2500, Инструкция по эксплуатации

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43
3–11 Deviation Band Alarm
A deviation band alarm presets two reference levels relative to set point. Two
types of deviation band alarm can be configured for alarm 1 and alarm 2. These
are deviation band high alarm (A1FN or A2FN select DB.HI) and deviation band
low alarm (A1FN or A2FN select DB.LO). If alarm 2 is required, then select AL2
for OUT2. Now NONE can't be selected for A2FN, otherwise Er06 will appear.
A1SP and A1HY are hidden if alarm 1 is selected as a deviation band alarm.
Similarly, A2SP and A2HY are hidden if alarm 2 is selected as a deviation band
alarm.
The trigger level for deviation band alarm moves with the set point. For alarm 1,
the trigger level=SP1±A1DV. For alarm 2, the trigger level=SP1±A2DV. One of
four alarm modes can be selected for alarm 1 and alarm 2. These are: normal
alarm, latching alarm, holding alarm and latching/holding alarm. See section 3-9
for descriptions of these alarm modes.
*
DBHi will trigger an alarm if the process value is outside of the deviation value (out of band)
*
DBLo will trigger an alarm if the process value is within the deviation value (in band)
Examples:
Error Code
2 types of deviation band alarms:
DB.HI, DB.LO
Deviation band alarm 1:
Setup: A1FN, A1MD
Adjust: SP1, A1DV
Trigger level=SP1±A1DV
Deviation band alarm 2:
Setup: OUT2, A2FN, A2MD
Adjust: SP1, A2DV
Trigger level=SP1±A2DV