Features Of Electronic Regulation - AERMEC Novatherm pCO3 Manual De Uso

1.

FEATURES OF ELECTRONIC REGULATION

Electronic regulation takes the form of
a pCO
control board for each com-
3
pressor and a display terminal for each
machine. The control boards (in mul-
ticompressor machines) and the ter-
minal are interconnected in a PLAN
network. In multicompressor machines
the board that controls compressor
No. 1 is the master board, while the
others are slaves. Each board, both
master and slave type, is connected
to transducers, loads and alarms relat-
ing to the compressor which it con-
trols, whereas the general transducers,
loads and alarms are connected only
HEAT REGULATION PROBE FOR THE ENTIRE SYSTEM
Heat regulation probe for the entire system
Master pCO
4x20 LCD terminal for
programming of all the pCO
to the master board. The master board
therefore controls the main machine
functions such as the working thermo-
stat, the total recovery thermostat, rota-
tion of the compressors and the general
alarms.
Each board is identified by an address
for communication in the PLAN and this
also determines the board type (master
board address 1, display terminal board
address 5.)
All these controls feature:
• A 16 bit, 14 MHz microprocessor,
512 byte RAM, 256 kbytes of static
Slave pCO
3
pGD-i user interface
Graphic
Menu
menu I/O I/O I/O I/O I/O I/O I/O set set set set set set set prog. prog. prog. prog. prog. prog. prog.
? on/off alarm enter
? ?
info info
s
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Slave pCO Slave pCO
3 3
pGD-i user interface
Graphic
Menu
menu I/O I/O I/O I/O I/O I/O I/O set set set set set set set prog. prog. prog. prog. prog. prog. prog.
? on/off alarm enter
? ?
info info
PRV3
Accessory 4x20 LCD terminal
remotable up to 400 metres
RAM and 1 Mbyte of flash memory
• PLAN serial connection (485)
• Presetting for connection to a
supervisor via 485 through an
accessory board.
• Clock with lithium battery
• Plastic container
• 24Vdc/Vac power supply
• 14 digital inputs
• 18 digital outputs
• 10 analogue inputs
• 6 analogue outputs
Fig. 3 shows the layout of the regulation
system.
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