aerauliqa QHS Series, Specific Manual

15

WARNING: regardless of the control system in place (potentiometer or ModBus), it’s strongly recommended to 

wire the ModBus communication line and make it accessible from ground level, in order to ease troubleshooting 

via ModBus anytime after the installation.

9. CLEANING

The unit (IP65) can be washed with water jets. In this case it is recommended to drill a hole under the plastic cover for water drainage.

10. TROUBLESHOOTING (ModBus)

10.1 Connection parameters

Protocol

MODBUS/RTU over RS485

Baud Rate (bps)

9600

Data bits

8

Parity bits

none

Stop bits

2

HVLS Slave Address

1

10.2 ModBus Registers - Input Register

These registers are READ-ONLY, and can be read using the function 

04 READ INPUT REGISTERS.

Register

Address

Description

Dimension

(Word)

Data
Type

U.M. (data on

the register)

Example

Register value 

→

 Real value

3

Measured speed

1

ushort

0.1rpm

490 

→

 49rpm

10

Alarm 1

1

ushort

-

See table (§ 10.3)

17

Alarm 2

1

ushort

-

See table (§ 10.3)

33

Minutes Time Counter

1

ushort

Minutes

23 

→

 23 Minutes

Start to Count when Motoinverter is On. 

Store lifetime data

34

Hours Time Counter

1

ushort

Hours

1234 

→

 1234 Hours

Start to Count when Motoinverter is On. 

Store lifetime data

POT.

CTRL-A (ACCESSORY ON REQUEST)

YELLOW-GREEN

BROWN

BLACK

GREY

L1

L2

L3

400 Vac

3 ph.

50/60 Hz

BROWN

YELLOW

GREEN

BOBINA

230V

BIPOLAR

SWITCH

230V

+

U

-

CTRL - A

6-core control cable

EXTERNAL CONTACTOR 

(NOT SUPPLIED)

4-core power cable

WHITE

GREY

PINK

X

MODBUS B

MODBUS A