Carel pCO User manual

Application program for pCO
Standard
Air-Conditioning units
Manual version: 1.5 - 30/05/96
Program code: EPSTDECZ00
Rif.: 76EM

INDEX
1. INSTALLATION GUIDE..................................................................................................................2
1.1. Description of the controller and components...............................................................................2
1.2- Hardware: user interface ............................................................................................................12
2. CONFIGURATION GUIDE............................................................................................................15
3. USER GUIDE....................................................................................................................................24
4. COMPONENTS AND CODES........................................................................................................39

2
1 - INSTALLATION GUIDE
1.1. DESCRIPTION OF THE CONTROLLER AND COMPONENTS
- CONTROL BOARD
The main board is the core of the controller.
It is made of:
# a section which includes the microprocessor and the memory for the machine
control algorithm;
# an I/O section which allows interfacing with controlled devices by means of a plug-
in terminal.
# a section devised for interfacing with supervisory network and terminal which can
be installed in a remote position.
The control board represents the core of the system as it contains the
microprocessor which performs the control algorithm and the user interface
management. This board is connected to a pCO terminal and to any options.
NO11
C11
NC11
VG1
Y1
B1
AVSS
B2
B3
B4
B5
B6
AVSS
AVSS
J14J15
G
G0
ID11R
ID11 (24V)
ID12R
ID12 (24V)
NO10
C10
NC10
NO9
C9
NC9
NO8
C8
NO7
C7
NO6
C6
NO13
C13
RS422
B8
B7
+24
IDCM2
ID10
ID9
ID8
ID7
ID6
IDCM1
ID5
ID4
ID3
ID2
ID1
NO12
C12
NO5
C5
NO4
C4
NO3
C3
NO2
C2
NO1
C1
R1
R2
R3
R4
R5R6
R7
R8
R9
R10
R11
R12R13
1
2
3
4
5
6
VG0
Y0
IC3
ID11 (220V)
ID12 (220V)
J28
J29 7
8
J17
J1
J19
J20
J21
J2
J3
J22
J4
J5
J24 J6
- List of components:
(1) 24 Vac supply cable
(2) Telephone cable connector for terminal connection (RS485) or for local
network connection
(3) Optional Clock board
(4) Optoisolated RS422 board for serial line connection for supervision and
telemaintenance
(5) Pin strip to select B5 and B6 voltage or current inputs
(6) Eprom with the programme
(7) Pin strip to select B28 and B29 voltage or current inputs
(8) Relay outputs
Rxx: Connectors for digital relay outputs

3
No: Normally open contact
Nc: Normally close contact
C : Common reference for contacts
ID : Digital inputs
IDCM: Common reference for digital inputs
Bx : Analogue input
AVSS: Reference for analogue outputs
Yx: Analogue outputs
VG1/0: 24V A.C. Analogue outputs power supply
- USER INTERFACE
Here below are listed all components of pCO control kit.
The terminal allows exchange of information by means of a LCD which displays the
values of all controlled parameters, selected set-points, alarm thresholds and in
general all data concerning the controlled variables in the specified formats.
Moreover, the display will showparticular messages any time an alarm condition
occurs. A keypad allowsthe setting of configuration parameters such as set-points,
alarm thresholds, alarm activation delays, etc. ...
The visible rubber buttons, which can be seen and pressed even when the front door
is closed, are the most important and the most used ones, above all when the
machine is ON.
The above quoted buttons are the following:
-1- ON/OFF button; -2- Buzzer silencing
and
alarm deactivating button; -3- button; -4- button; -5- ENTER button.
- FRONT PANEL
menu' I/O set prog.
estateinver.
?
info
This is the control board front panel. The 4X20 LCD on the panel displays the values
measured by the probes, working parameters and all necessary information for a
12345

4
complete and precise regulation. The keypad allows access to the masks of the
programme and any modification required.
The display normally shows ambient temperature and humidity together with time
and date if clock option is present.
The pCO keypad is equipped with 15 buttons which, together with 4X20 LCD,
represent the interface between user and controller.
menu' I/O set
?
info
prog
Directly from the keypad it is possible to gain access to the main parameters or to
some parameters loops.
The "AL "message, on the upper right corner of the display, indicates an alarm
condition and allows the access to the masks where the exact type of alarm is
identified (for further information see below - ALARM button
)
All reading and setting values are displayed according to a “tree” structure the user
can enter by means of the controller keypad.
- pCO KEYPAD
GENERAL FUNCTIONING:
The first 10 buttons, the ones which disappear when closing the front door, are
meant to allowthe user to perform any kind of procedures from programming to
parameters simple display. The blue and red buttons have not been used.
Their function is
to select
the required loop (or chain of masks). The 5 rubber
buttons are used for programming and for parameters display. Once completed the
procedures in a loop, which has been selected by pressing a button, the user only
has to press another button to go at once to another loop.
The buttons share the following peculiar features :
-1- A green
LED
next to each button indicates which button has been selected. The
LED remains ON as long as that loop of masks is being used. The LED is important
in case the user does not remember which loop has been selected. It is important to
point out that only one out of the 8 grey buttons can be ON, therefore activation of
one automatically deactivates the others. Moreover, the user must remember that
the LEDs will never be all OFF, because the mask menu is always on display;
therefore, the LED next to the menu is ON even if no procedure is being performed
or after a RESET due to a blackout:
-2- In the programme itself there is an automatic function which brings
back on display the menu mask and, as a consequence, the LED next to the menu
button will be turned ON again.
menu'

5
If, for example, the last procedure has been the setting of the printer parameters, for
some seconds the last selected mask will remain on display and the LED next to the
printer button will remain ON:
Once the selected time has elapsed, the LED next to the printer button will be turned
OFF, the one next to the menu button will be turned ON and the temperature and
humidity values will be displayed.
-3- Each loop of masks follows an order. This means that by pressing a button the
first
mask of the corresponding loop will be displayed. If the user then moves to
other masks of the loop and by chance presses again the same button, the first
mask will be displayed again.
MENU BUTTON
Gives information on the temperature and humidity values measured by the selected
probes (the temperature probe is the only one to be always present and not
selectable).
The procedure to be followed is:
- press the MENU button once
Result of procedure:
- the display will showthe mask which indicates ambient temperature, ambient
humidity, time, date and condition of the machine.
Procedure to be followed:
- press the and buttons
Result of procedure:
- cyclic visualisation of the loop of probe reading masks.
MAINTENANCE BUTTON
Allows visualisation and clearing of the total functioning hours of the main devices.
Procedure to be followed:
- press the Maintenance button once
Result of procedure:
- the display will show the working hours of the first three selected devices.
Procedure to be followed:
- press the and buttons
Result of procedure:
-cyclic visualisation of the masks which indicate for each device (heaters excluded)
the activity hours and the setting of threshold hours and hour clearing .
N.B. Reset of functioning hours: it is necessary to press ENTER to move the cursor
to the "NO" sign. To reset the machine it is necessary to keep the or the
button pressed for a couple of seconds until the “YES” sign appears. At this
point wait for the "NO" sign to be displayed again.
menu'
menu'

6
PRINTER BUTTON
Allows the user to manage the printer and to select its required parameters.
Procedure to be followed:
- press the Printer button once.
Result of procedure:
- the display will showa mask for the immediate setting of printing by simply pressing
Enter.
Procedure to be followed:
- press the and buttons.
Result of procedure:
- activates the cyclic repetition of masks for immediate printing setting,for cyclic
printing and, if the latter has been activated, of masks for the setting of cyclic printing
interval.
INPUT/OUTPUT BUTTON
Allows visualisation of the status of interface board inputs/outputs.
Procedure to be followed:
- press the Input/Output button once.
Result of procedure:
- the display will show the status of all digital inputs.
Procedure to be followed:
- press the and buttons.
Result of procedure:
- activates the repetition of masks which indicate the status of digital outputs,
analogue outputs and of digital inputs. Analogue inputs are already read in the Menu
branch, therefore they are not visualised here.
N.B. Since digital inputs 7- 8- 9- 10 can manage different devices according to
the settings effected in the manufacturer branch, I/O masks will indicate
the selected device next to the output number in question.
CLOCK/TIME ZONES BUTTON
Allows the setting of time and date as well as the management of time zones.
Procedure to be followed:
- press the Clock button once.
Result of procedure:
- the display will show a mask for the setting of the date (day, month, year).
I/O

7
Procedure to be followed:
- press the and buttons.
Result of procedure:
- repetition of the masks for the management of time, for the setting of the password
to gain access to the time zones branch, and again for the setting of the date.
Procedure to be followed:
- press the Enter button when the display shows the Password selecting mask.
Result of procedure:
- access to the field where the correct password (which is the same as the user
password, that is 1234) is to be selected. If the password has been correctly
selected, by pressing Enter you will move to the time zones branch, otherwise you
will return to the clock loop.
Only for Time Zones setting
Once the above quoted procedures have been followed, you reach a mask asking if
you want to select the time zones: if so, the following masks will be used to select
times and set-points for temperature and humidity, otherwise you will goback to the
first mask of the clock branch.
SET BUTTON
Allows the setting of set-points for ambient temperature and humidity regulation.
Procedure to be followed:
- press the Set button once.
Result of procedure:
- the display will show the mask for temperature set-point setting.
Procedure to be followed:
- press the and buttons.
Result of procedure:
- visualisation of the mask for humidity set-point setting.
PROGRAMMING BUTTON
Allows access to system parameters programming masks in all those functions the
user need to personalise regulation.
Procedure to be followed:
- press the Prog button once.
Result of procedure:
-the display will showthe user password (1234) selecting mask. If the password has
been correctly selected, by pressing Enter you will reach the user branch; otherwise,
you will remain in this mask.
Procedure to be followed:
- press the and button more than once.
set
prog

8
Result of procedure:
-visualisation of a series of masks for the setting of all values necessary to
humidity and temperature control and for the setting of set-points and differentials of
connected devices.
? INFO BUTTON
Allows visualisation of the software version.
Procedure to be followed:
- press the Info button once.
Result of procedure:
- the display will show the software version.
MANUFACTURER BUTTONS
Allowaccess to the manufacturer password selecting mask which, if correctly
selected (0123), enables entering the branch for activation of probes, connected
devices and their main functions, and for default configuration set-up (standard
values).
Procedure to be followed :
- press at the same time the Programming and the Menu buttons for a couple of
seconds.
Result of procedure:
- the display will showa mask for password setting. If the password has been
correctly selected, by pressing the Enter button you will gain access to said branch,
otherwise you will remain in the password selecting mask.
MANUAL BUTTONS
Allowaccess to the loop for the manual activation of devices if pressed together for a
couple of seconds.
Procedure to be followed:
- press for a couple of seconds the Menu and Set buttons.
Result of procedure:
- access to a mask asking if you want to select manual functioning of devices. If you
answer positively, you will gain access to a loop of masks which enables activation of
all devices. These masks can be reached by pressing the
and
buttons
.
ON/OFF BUTTON
Allows machine turning ON and OFF.
Procedure to be followed:
- press the ON/OFF button once.
?
info
menu' prog
menu'
set