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

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

AVSS

J14J15

ID11R

ID11 (24V)

ID12R

ID12 (24V)

NO10

C10

NC10

NO9

NC9

NO8

NO7

NO6

NO13

C13

RS422

+24

IDCM2

ID10

ID9

ID8

ID7

ID6

IDCM1

ID5

ID4

ID3

ID2

ID1

NO12

C12

NO5

NO4

NO3

NO2

NO1

R5R6

R10

R11

R12R13

VG0

IC3

ID11 (220V)

ID12 (220V)

J28

J29 7

J17

J19

J20

J21

J22

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

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

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'

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'

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

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

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

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