Pixsys ATR 121 - Function Neutral Zone

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18 - FUNCTION NEUTRAL ZONE
The Neutral Zone function (which can be enabled selecting
on parameter 28 ) allows the setting of a neutral
zone control action as described in the graph. In Heating mode
(parameter
selected as ), the operating treshold
for control relay will be the value resulting from SET1 minus
SET2, and the operating treshold for alarm relay will be SET1
plus SET2 (hysteresis is always set via parameter
).
Within this band both relays are off; one relay works above this
band and one relay works below.
In Cooling mode (parameter
selected as ) the
operating tresholds of both relays are reversed.
SET 2
SET 2
Hysteresis (HY.C)
Hysteresis (HY.C)
PROCESS
Operating Zone
alarm Relay
Operating Zone
Comand Relay
Operating Zone
comand Relay
SET 1
TIME
TEMPERATURE
Ex. Function neutral zone for heating modality (HEA/HEAT on parameter REG)
Standard alarm (band, deviation …) is not available in this
mode.