Commissioning; Confi Guration; Preparing For Operation; Switching The Controller On/Off - Carel ir33 Universale series User Manual

ENG
4.1 Confi guration
The confi guration parameters should be set when commissioning the
controller, and involve:
•
serial address for the network connection;
•
enabling the keypad, buzzer and the remote control (accessory);
•
setting a delay for starting control after the device is powered up (delay
at start-up);
•
gradual increase or reduction in the set point (soft start).
4.1.1 Serial address (parameter c32)
c32 assigns the controller an address for the serial connection to a
supervisory and/or telemaintenance system.
Par. Description
c32 Serial connection address
4.1.2 Disable keypad/remote control (parameter c50)
Some functions relating to the use of the keypad can be disabled, for
example, the setting of the parameters and the set point if the controller
is exposed to the public.
Par. Description
c50 Disable keypad and remote control
Below is a summary of the modes that can be disabled:
Par c50 Edit P
parameters
0 NO
1 YES
2 NO
With the "change set point" and "edit P parameters" functions disabled,
the set point and the type P parameters cannot be changed, however
the values can be displayed. The type C parameters, on the other hand,
being protected by password, can be set on from keypad, following the
standard procedure. With the remote control disabled, the values of the
parameters can be displayed but not set. See the paragraph on using the
remote control.
If c50 is set =2 from the remote control, this is instantly disabled. To re-
enable the remote control, set c50=0 or c50=1 on the keypad.
4.1.3 Show standard display/disable buzzer
(parameters c52,c53)
Par. Description
Display display
c52 0=Probe 1
1=Probe 2
2=Digital input 1
3=Digital input 2
Buzzer
c53 0=Enabled
1=Disabled
4.1.4 Delay at start-up (parameter c56)
Used to delay the start of control when the device is powered up. This
is useful in the event of power failures, so that the controllers (in the
network) don't all start at the same time, avoiding potential problems of
electrical overload.
Par. Description
c56 Delay at start-up
4.1.5 Soft start (parameter c57)
This function is used to gradually increase or decrease the set point
according to the value of the parameter. The function is useful if the
controller is used in cold rooms or seasoning rooms, or in similar situations
when starting at full load may not be compatible with the required
process. Soft start, if active, is used on power-up or within an operating
cycle. The unit of measure is expressed in minutes / °C.
Par. Description
c57 Soft start
ir33 universale +030220801 - rel. 1.0 - 16.04.2008

4. COMMISSIONING

Def Min Max UoM
1 0 207 -
Def Min Max UoM
1 0 2
Change Settings from
set point remote control
NO YES
YES YES
NO NO
Def Min Max UoM
0 0 3 -
0 0 1 -
Def Min Max UoM
0 0 255 s
Def Min Max UoM
0 0 99 min/°C
°C
Example: when c57=5, assuming the set point is 30°C and the diff erential 2
°C, and that the ambient temperature is 20°C; on power-up the virtual set
point will be the same as the temperature measured, and will remain at this
value for 5 minutes. After 5 minutes, the virtual set point will be 21 degrees,
no outputs will be activated, while after another 5 minutes the virtual set
point will be 22°C, thus entering the control band (as the diff erential is 2°C)
and heating will start. Once the temperature reaches the virtual set point,
the function stops and the process continues.
-

4.2 Preparing for operation

Once having completed the installation, confi guration and programming
operations, before starting the controller check that:
•
The wiring is performed correctly;
•
The programming logic is suitable for controlling the unit and the
system being managed;
•
If the controller is fi tted with RTC (clock), set the current time and the
on and off times;
•
Set the standard display;
•
Set the "type of probe" parameter based on the probe available (NTC,
NTC-HT, PTC, PT1000) and the unit of measure (°C or °F);
•
Set the type of control: ON/OFF (proportional) or proportional, integral,
derivative (PID);
•
Set the unit of measure for the probes (°C or °F);
•
Any operating cycles are programmed correctly;
•
The protection functions (delay at start-up, rotation, minimum on and
off times for the outputs) are active;
•
The remote control enabling code is set, if a series of controllers are
installed in the same system;
•
If the CONV0/10A0 module is connected, the cycle time is set to the
minimum (c12=0.2 s);
•
The special mode is set in the correct sequence, i.e. fi rst parameter c0 is
set, and then parameter c33 (see the chapter on Functions).
All the alarms with manual reset can be reset by pressing the
buttons together for more than 5 seconds.

4.3 Switching the controller On/Off

The unit can be switched ON/OFF from a number of sources; supervisor
and digital input (parameters c29,c30). The digital input can be used to
switch the controller on/off in level 1 (maximum priority).
If more than one digital input is selected as On/Off , the ON status will
be activated when all the digital inputs are closed. If just one contact is
open, the unit is switched OFF. In this operating mode, the display shows
the standard view, alternating with the message "OFF". In OFF status, the
outputs are disabled, while the following functions are enabled:
•
editing and display of the frequent and confi guration parameters, and
the set point;
•
selection of the probe to be displayed;
•
remote on/off ;
•
probe 1 error (E01), probe 2 error (E02), clock alarm (E06), EEPROM alarm
- unit parameters (E07) and EEPROM alarm -operating parameters
(E08).
•
The controller switches from ON to OFF as follows: the compressor
protection times are observed;
•
The controller switches from OFF to ON as follows: the compressor
protection times are observed.
22
set point
process value
output status
and