Carel µC2SE

56
1
2
ENGLISH
µC
2
SE - +030220426 - rel. 2.0 - 03.08.2009
- Damper opening duty cycle differential
r37: used to calculate the duty cycle for opening the damper.
- Damper closing duty cycle differential
r38: used to calculate the duty cycle for closing the damper.
Key:
1. opening time;
2. cycle time.
- Autotuning correction coeffi 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 satisfi ed
r40= 2 the damper is moved to the minimum opening when control is not active, and only if the
freeheating conditions are satisfi 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 satisfi 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: defi 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: defi 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: defi 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 µAD, r01 or r04 or from time band) depending on the
various applications and the mode, cooling or heating, and more precisel:
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 different 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 fi tted. The terminal shows whether the
clock board is fi 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 differential example