Honeywell DCP550, Руководство пользователя

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Chapter 5. FUNCTIONS
• Automatic changeover A
Set 1 in setup data setting
C26
to allow automatic changeover to set the temperature
(switch point) where channels are switched and the dead band setting that prevents
switch chattering. Examples 1 to 4 below describes switch operations.
Example 1:
(1) When the high-temperature sensor senses that the temperature has risen to
changeover point A, the channel switches from the low-temperature to the high-
temperature sensor.
(2) No switching is performed at changeover point C when the high-temperature
sensor senses that the temperature has only reached point B and does not exceed
the upper limit of the dead band.
(3) When the high-temperature sensor senses that the temperature has dropped to
point D the lower limit of the dead band, the channel switches from the high-
temperature to the low-temperature sensor.
Example 2:
(1) When the temperature rises and the high-temperature sensor senses that the tem-
perature has risen to changeover point A, the channel switches from the low-
temperature sensor to the high-temperature sensor.
(2) When the high-temperature sensor senses that the temperature has risen above
the upper limit of the dead band and reached point B, the channel switches from
the high-temperature to the low-temperature sensor at changeover point C.
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