Constant temperature and humid PLC control system

Description:

Constant temperature and humid PLC control cabinet widely used in workship,
exhibition, archive room, laboratory, network room need constant temperature
and humid.
Xiangke constant temperature & humid system saved much energy, reduced
compressor working time and extended service life compared with traditional air
conditional. it has good stable, Strong anti-interference ability.The system
fixed warm humidity transmitter as digital transmission.long transmission
distance, free of electrostatic interference. Control precision.

System hardware structure:

The core of system is Siemens PLC, touch screen as human-computer interface.
the temperature and humility transfer by sensor, It is processed into digital
signal by single chip, via RS485 wire transfer to PLC, and data processing, and
controlled via PID. Keep constant temperature and humility controlling
compressor, humidificatin valve,fan valve.


The procedure of control for constant temperature and humid:
There are 5 method from PLC controlling.
6. monitor status. The system only reads the temperature and humidity of
the environment,without controlling.
7. Hand control status.when compressor forced operation need hand
control.You can touch compressor 1, compressor 2 for start.
8. Automatic humidification, When start this method, the system will work
according fixed upperlimit & lowerlimit.

9. Automatic temperature control. When start this method, the system will
work according fixed upperlimit & lowerlimit. At the same time, monitor the
outdoor temperature is less than 14 ℃

10. Circulation working: combination method 3 & method 4. Temperature
controlling then humidification controlling.

Minimum Order: 1 sets

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