Pixsys ATR 401, User Manual, Page: 24 / 124

24 ATR401 - User manual
Integral time and derivative time are the same for both actions.
Parameter

sets the percentage overlapping between the two actions.
For installations where heating and cooling output cannot be activated at the
same time, a dead band will be confi gured (

≤ 0),
vice versa an overlapping will be confi gured (

> 0).
Figure here below shows an example of double action P.I.D. (heating-cooling)
with

= 0 and

= 0.
SPV
PV
ATTIVO
ACTIVE
ATTIVO
ACTIVE

x

(COOL-FREDDO)

< 0

(HEAT-CALDO)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
SPV
PV
ATTIVO
ACTIVE
ATTIVO
ACTIVE

x

(COOL-FREDDO)

= 0

(HEAT-CALDO)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)
SPV
PV
ATTIVO
ACTIVE
ATTIVO
ACTIVE

x

(COOL-FREDDO)

> 0

(HEAT-CALDO)
COMMAND OUTPUT (HEAT)
ALARM OUTPUT (COOL)