56
1
2
ENGLISH
µC
2
SE - +030220426 - rel. 2.1 - 09.06.2010
- Damper opening duty cycle di erential
r37: used to calculate the duty cycle for opening the damper.
- Damper closing duty cycle di erential
r38: used to calculate the duty cycle for closing the damper.
Key:
1. opening time;
2. cycle time.
- Autotuning correction coe cient
r39: when changing the step in autotuning, prevents sudden variations in the controlled values
from altering the control logic.
- Management of minimum damper opening
r40: enables and sets the management of the minimum damper opening.
r40= 0 the damper is always closed if control is not active
r40= 1 the damper is moved to the minimum opening when control is not active and only if the
freecooling conditions are satis ed
r40= 2 the damper is moved to the minimum opening when control is not active, and only if the
freeheating conditions are satis ed
r40= 3 the damper is moved to the minimum opening when control is not active, and only if the
freecooling and freeheating conditions are satis ed
r40= 4 the damper is moved to the minimum opening when control is not active, and only if the
freecooling and freeheating conditions are not true
r40= 5 the damper is moved to the minimum opening when control is not active, and only if the
freeheating conditions are not true
r40= 6 the damper is moved to the minimum opening when control is not active, and only if the
freecooling conditions are not true
r40= 7 the damper is moved to the minimum opening when control is not active, regardless of
the freecooling and freeheating conditions
r40= 8 in cooling
r40= 9 in heating
- Minimum damper opening position
r41: de nes the percentage of the damper travel time for the minimum damper opening position.
The damper is moved to the minimum opening only when control is not active and after having
been completely closed so as to reset the correct evaluation of the position following control, or
alternatively directly to the minimum opening position set if the damper was previously in the
completely open position.
- Disable compressors for low outside temperature in Freecooling
r42: de nes the outside temperature threshold in freecooling mode below which the
compressors are disabled, being considered unnecessary. Above the threshold, on the other
hand, the compressors operate to support freecooling.
- Electric heater set point relationship
r43: de nes the relationship between the absolute set point, considered as the activation threshold
for the electric heaters, and the relative set point, that is, the activation threshold for the electric
heaters referred o a working set point (set point sent by AD, r01 or r04 or from time band)
depending on the various applications and the mode, cooling or heating, and more precise:
r40= 0 electric heater set point A4, A8 and A11 on absolute values
r40= 1 electric heater set point A4 absolute value, A8 and A11 values relative to the working set point
r40= 2 electric heater set point A4 value relative to the working set point, A8 and A11 absolute
values
r40= 3 electric heater set point A4, A8 and A11 values relative to the working set point
- Damper inactivity time in control
r44: represents the time, expressed in seconds, of inactivity between one opening or closing of
the damper and the next. This time is used to adapt the dynamics of the system to the di erent
applications, thus allowing the damper to reach a stable position, according to the load and the
environment.
• Firmware parameters: (F-r*)
These parameters cannot be set (display only:
H96-H97: software version of Driver 1, 2;
H98: software version of the expansion;
H99: software version of the µC
2
SE controller.
Functions available with the clock board
The alarm log is only active and operative if the clock board is tted. The terminal shows whether
the clock board is tted by displaying the following parameters:
- RTC hours
t01: RTC hours
- RTC minutes
t02: RTC minutes
- RTC day
t03: RTC day
- RTC month
t04: RTC month
Fig. 5.b.u
Duty cycle di erential example
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