Carel FLSTDMFC0A, Руководство пользователя

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FLSTDMFC0A pCO² refrigeration system
cod. Carel +030221991 rel. 1.0 dated 27/07/01
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This program allows the management of a refrigeration system, with the following characteristics:
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display and control of the values measured;
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management of between one and six compressors, depending on the number of outputs, with between zero and three
capacity-control steps each, and between one and five condensation stages;
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configuration of the devices being controlled;
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display of alarms by LCD display, and audible signal;
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programming of the configuration parameters and a number of operating parameters with password-protected access;
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availability of three levels of access to the parameter setting screens, controlled by three different passwords;
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modification of the fundamental operating parameters (set point, differentials, alarm thresholds, time settings);
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programming of the time bands, and control of the compressors with a second set point to allow energy savings in the set
time bands;
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multi-language management
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connection to a supervisor/telemaintenance serial line.
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The purpose of this application is to control a refrigeration system in which the maximum configuration features the
management of 6 compressors with 3 capacity-control steps, 5 fans and 2 controllers.
The control is based on the readings from the two pressure probes connected to analogue inputs B1 and B2.
The digital inputs on the pCO² board are connected to the alarm signals from the devices.
The activation of the alarms is signalled on the display in the specific screens, and by a buzzer (only with the external terminal).
The program features a number of screens for setting the operating values, and others for setting the machine configuration, all
protected by password.
There are three levels of access to the protected screens, each referring to different passwords:
level 1
User password (“user branch”): refers to a modifiable password, which allows access
only to the setting of the control operating parameters.
Default value = 0
level 2
Service password (“service branch”): refers to a modifiable password, which allows
access to the maintenance parameters.
Default value = 0
level 3
Manufacturer password (“manufacturer branch”): refers to a modifiable password
which allows access to all the machine configuration screens, including the setting of a
new user, service and manufacturer password and the entering of the default values
Default value = 1234
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There is a fixed password that accesses any branch and is set during programming: FIXED PASSWORD = 1234.
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to avoid tampering during the operation of the machine, only qualified personnel must know the
manufacturer password. In particular, the manufacturer and fixed password are used in the preliminary phases of installation and
when the setting screens protected by the other passwords cannot be accessed.
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The first time that the pCO² is used the data in the permanent memory should be initialised to prevent the use of incorrect for the
required control functions.
For this reason, the first time the pCO² is used, and any time the software release is upgraded, the default values should be
entered.
This is performed automatically the fist time the program is run.
To perform the same procedure at any other time, follow these steps:
1.
Turn the pCO² on; after a certain time in which the check routine is run, the pCO² will display the main screen,
M_MAIN_MENU. During the first installation IGNORE the alarms, as these may be the result of incorrect data in the
permanent memory.
2. Press the MENU + PROG buttons to display the password setting screen. This screen prevents access to the configuration
branch by unauthorised persons.
3. Enter the password (default 1234), and press ENTER to confirm.
4. Move to the last row: “INITIALISATION ->”, and press ENTER.
5. Press the UP button. The “M_DEFAULT” screen will be displayed.
6. Select the configuration model required;
7. Press ENTER and UP, the text “PLEASE WAIT” will be displayed for a few seconds; this mode deletes the permanent
memory and enters the manufacturer values defined by Carel so as to speed up the work of the installer.