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5.2.4.10 SP1 Range
SP1L (SP1 low limit value) and SP1H (SP1 high limit value) in setup menu are used to confine
the adjustment range of SP1.
Example: A freezer is working in its normal temperature range -10°C to -15°C. In order to avoid an
abnormal set point, SP1L and SP1H are set with the following values: SP1L = -15°C SP1H = -10°C
Now SP1 can only be adjusted within the range from -10 C to -15 C.
5.2.4.11 Dwell Timer
Alarm 1 or alarm 2 can be configured as dwell timer by selecting TIMR for A1FN or A2FN, but
not both, otherwise Error will appear. As the dwell timer is configured, the parameter TIME is used for dwell
time adjustment. The dwell time is measured in minute ranging from 0 to 6553.5 minutes. Once the process
reaches the set point the dwell timer starts to count from zero until time out. The timer relay will remain
unchanged until time out. The dwell timer operation is shown as following diagram.
If alarm 1 is configured as dwell timer, A1SP, A1DV, A1HY and A1MD are hidden. Same case is
for alarm 2.
Example
Set A1FN=TIMR or A2FN=TIMR but not both. Adjust TIME in minutes .A1MD (if A1FN=TIMR) or
A2MD (if A2FN=TIMR) is ignored in this case.
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