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7
ENG
ir33+ VCC +040000058 - rel. 1.2 - 15.02.2018
2.2 ir33+ VCC with serial protocol control
To manage the inverter in serial protocol control mode, models IRF3* and PBF3* (except for PBF3D*) use the
second serial port, which is otherwise normally used to connect the repeater terminal. The CAREL adapter
IROPZVCC00 is used to connect the inverter.
Fig. 2.e
The serial communication protocol technical specifi cations are as follows:
Communication type Asynchronous (start-stop)
Baud Rate 600 baud
Start Bits 1
Data Bits 8
Stop Bits 1
Parity None
Flow Control None
Unit Size 5 Bytes
Tab. 2.a
Compressor speed is sent to the inverter using a specifi c command in accordance with the serial protocol.
Compressor speed is determined by the value sent, using the following relationship:
5000
4000
3000
4500
3500
2000
2500
1000
1500
0
- 200 300 800 1300 1800 2300 2800 3300 3800
500
S peed sent
(rpm)
Motor compressor
speed
4300 4800
Fig. 2.f