Copyright HK Instruments 2021
www.hkinstruments.fi
Installation version 7.0 2021
The seller is obligated to provide a warranty of five years for the delivered
goods regarding material and manufacturing. The warranty period is consid-
ered to start on the delivery date of the product. If a defect in raw materials or a
production flaw is found, the seller is obligated, when the product is sent to the
seller without delay or before expiration of the warranty, to amend the mistake
at his/her discretion either by repairing the defective product or by delivering
free of charge to the buyer a new flawless product and sending it to the buyer.
Delivery costs for the repair under warranty will be paid by the buyer and the
return costs by the seller. The warranty does not comprise damages caused by
accident, lightning, flood or other natural phenomenon, normal wear and tear,
improper or careless handling, abnormal use, overloading, improper storage,
incorrect care or reconstruction, or changes and installation work not done by
the seller or his/her authorized representative. The selection of materials for
devices prone to corrosion is the buyer’s responsibility, unless otherwise is le-
gally agreed upon. Should the manufacturer alter the structure of the device,
the seller is not obligated to make comparable changes to devices already pur-
chased. Appealing for warranty requires that the buyer has correctly fulfilled
his/her duties arisen from the delivery and stated in the contract. The seller
will give a new warranty for goods that have been replaced or repaired within
the warranty, however only to the expiration of the original product’s war-
ranty time. The warranty includes the repair of a defective part or device, or if
needed, a new part or device, but not installation or exchange costs. Under no
circumstance is the seller liable for damages compensation for indirect damage.
Register
Parameter description
Data Type
Value
Range
4x0001
Parameter for P-controller
16 bit
0...3
0=CO2, 1=rH, 2=TE, 3=MAX
4x0002
CO2 hIgh limit
16 bit
500...2000
500...2000 ppm
4x0003
CO2 low limit
16 bit
0...1900
0...1900 ppm
4x0004
rH high limit
16 bit
100...1000
10.0...100.0 %
4x0005
rH low limit
16 bit
0...900
0.0...90.0 %
4x0006
TE high limit
16 bit
50...500
5.0...50.0 °C
4x0007
TE low limit
16 bit
0...450
0...45.0 °C
4x0008
Parameter for relay
16 bit
0...3
0=CO2, 1=rH, 2=TE, (3=Off)
4x0009
CO2 relay on
16 bit
500...1950
500...1950 ppm
4x0010
CO2 relay off
16 bit
450...1900
450...1900 ppm
4x0011
rH relay on
16 bit
15...990
1.5...99.0 %
4x0012
rH relay off
16 bit
10...985
1.0...98.5 %
4x0013
TE relay on
16 bit
15...490
1.5...49.0 °C
4x0014
TE relay off
16 bit
10...485
1.0...48.5 °C
Function code 03 - Read input holding register
Function code 04 - Read input register
Register
Parameter description
Data Type
Value
Range
3x0001
Parameter for P-controller
16 bit
0...3
0=CO2, 1=rH, 2=TE, 3=MAX
3x0002
CO2 reading
16 bit
0...2000
0...2000 ppm
3x0003
rH reading
16 bit
0...1000
0,0...100.0 %
3x0004
Temp. reading
16 bit
0...500
0.0...50.0 °C
3x0005
CO2 high limit
16 bit
500...2000
500...2000 ppm
3x0006
CO2 low limit
16 bit
0...1900
0...1900 ppm
3x0007
rH high limit
16 bit
100...1000
10.0...100.0 %
3x0008
rH low limit
16 bit
0...900
0.0...90.0 %
3x0009
TE high limit
16 bit
50...500
5.0...50.0 °C
3x0010
TE low limit
16 bit
0...450
0...45.0 °C
3x0011
Parameter for relay
16 bit
0...3
0=CO2, 1=rH, 2=TE, (3=Off)
3x0012
CO2 relay on
16 bit
500...1950
500...1950 ppm
3x0013
CO2 relay off
16 bit
450...1900
450...1900 ppm
3x0014
rH relay on
16 bit
15...990
1.5...99.0 %
3x0015
rH relay off
16 bit
10...985
1.0...98,5 %
3x0016
TE relay on
16 bit
15...490
1.5...49.0 °C
3x0017
TE relay off
16 bit
10...485
1.0...48.5 °C
MODBUS REGISTERS
CONTINUED
Function code 16 - Write multiple registers
Register
Parameter description
Data Type
Value
Range
4x0001
Parameter for P-controller
16 bit
0...3
0=CO2, 1=rH, 2=TE, 3=MAX
4x0002
CO2 hIgh limit
16 bit
500...2000
500...2000 ppm
4x0003
CO2 low limit
16 bit
0...1900
0...1900 ppm
4x0004
rH high limit
16 bit
100...1000
10.0...100.0 %
4x0005
rH low limit
16 bit
0...900
0.0...90.0 %
4x0006
TE high limit
16 bit
50...500
5.0...50.0 °C
4x0007
TE low limit
16 bit
0...450
0...45.0 °C
4x0008
Parameter for relay
16 bit
0...3
0=CO2, 1=rH, 2=TE, (3=Off)
4x0009
CO2 relay on
16 bit
500...1950
500...1950 ppm
4x0010
CO2 relay off
16 bit
450...1900
450...1900 ppm
4x0011
rH relay on
16 bit
15...990
1.5...99.0 %
4x0012
rH relay off
16 bit
10...985
1.0...98.5 %
4x0013
TE relay on
16 bit
15...490
1.5...49.0 °C
4x0014
TE relay off
16 bit
10...485
1.0...48.5 °C
RECYCLING/DISPOSAL
The parts left over from installation should be
recycled according to your local instructions.
Decommissioned devices should be taken to a
recycling site that specializes in electronic waste.
WARRANTY POLICY
Register
Parameter description
Data Type
Value
Range
1x0001
Relay status
Bit 0
0...1
0=Off - 1=On
1x0002
Relay trend
Bit 0
0...1
0=Increasing, 1=Decreasing
1x0003
Timer status
Bit 0
0...1
0=Off - 1=On
Function code 02 - Read input status
Function code 06 - Write single register
Register
Parameter description
Data Type
Value
Range
4x0001
Parameter for P-controller
16 bit
0...3
0=CO2, 1=rH, 2=TE, 3=MAX
4x0002
CO2 hIgh limit
16 bit
500...2000
500...2000 ppm
4x0003
CO2 low limit
16 bit
0...1900
0...1900 ppm
4x0004
rH high limit
16 bit
100...1000
10.0...100.0 %
4x0005
rH low limit
16 bit
0...900
0.0...90.0 %
4x0006
TE high limit
16 bit
50...500
5.0...50.0 °C
4x0007
TE low limit
16 bit
0...450
0...45.0 °C
4x0008
Parameter for relay
16 bit
0...3
0=CO2, 1=rH, 2=TE, (3=Off)
4x0009
CO2 relay on
16 bit
500...1950
500...1950 ppm
4x0010
CO2 relay off
16 bit
450...1900
450...1900 ppm
4x0011
rH relay on
16 bit
15...990
1.5...99.0 %
4x0012
rH relay off
16 bit
10...985
1.0...98.5 %
4x0013
TE relay on
16 bit
15...490
1.5...49.0 °C
4x0014
TE relay off
16 bit
10...485
1.0...48.5 °C
STEP 5: MODBUS REGISTERS
Functions for Modbus communication:
Function Code
Description
01
Read coil status
02
Read input status
03
Read holding registers
04
Read input registers
05
Force single coil
06
Preset single register
07
Read exception status
15
Force multiple coils
16
Preset multiple registers
17
Report slave ID
Jumper settings
CONTINUED
Function code 05 - Write single coil
Register
Parameter description
Data Type
Value
Range
0x0001
Relay trend
Bit 0
0...1
0=Increasing, 1=Decreasing
Jumper installed to the left side pins:
0–10 V output selected
N/A
N/A
Analog
0...10 V 4...20 mA
Jumper installed to the right side pins:
4–20 mA output selected
N/A
N/A
Analog
0...10 V 4...20 mA
Figure 4
2) Locking the display:
Install the jumper to lock the display to prevent access to the
configuration menu after installation is completed (see the
schematics for the location of the pins).
