HK Instruments DPT-Ctrl-MOD Series Installation Instructions page 4

STEP 7: Fixed output
Fixed output settings can be enabled to set the control output to a preset value.
Primary purpose of this functionality is to enable the adjustment of air valves
and terminals without the DPT-Ctrl affecting the duct pressure or air flow. It can
also aid in troubleshooting the installation.
1) To enable the fixed output, scroll to its position in the menu.
FIXED OUTPUT
OFF
2) Press the select button and select the desired fixed output value. The
output will now stay at this value indefinitely. In normal operation mode
(shown below), the upper row of the display will show FIXED xx % to
indicate the output is fixed.
FIXED 50 %
184 Pa
3) To enable the normal control output and disable the fixed output, scroll to
its position, select it and set value to OFF.
Fixed output function is also available via Modbus. (4x0016: Overdrive active,
4x0015: Overdrive value)
STEP 8: MODBUS REGISTERS
Function code 03 - Read input holding register
Register Parameter description
4x0001 Manufacturer
4x0002 Formula unit (Manufacturer = 7)
4x0003 K-factor integral
4x0004 K-factor decimal
4x0005 Response time
4x0006 PID control unit
4x0007 PID pressure ref
4x0008 PID flow ref integer
4x0009 PID flow ref decimal
4x0010 PID p value
4x0011 PID i integer
4x0012 PID i decimal
4x0013 PID d integer
4x0014 PID d decimal
4x0015 Overdrive value
4x0016 Overdrive active
4x0017 Temperature compensation
4x0018 Temp. comp. start TE
4x0019 Temp. comp. stop TE
4x0020 Temp. comp. drop integer part
4x0021 Temp. comp. drop decimal part
Function code 04 - Read input register
Register Parameter description
3x0001 Program version
3x0002 Pressure reading A
3x0003 Input 0...10 V
3x0004 Input PT1000
3x0005 Input Ni1000
3x0006 Input Ni1000-LG
3x0007 Input NTC10k
3x0008 Flow m3/s
3x0009 Flow m3/h
3x0010 Flow cfm
3x0011 Flow l/s
3x0012 Velocity m/s
3x0013 Velocity f/min
Copyright HK Instruments 2018
SELECT
UP
DOWN
Data Type Value Range
16 bit 0...7 0...7
0=m3/s, 1=m3/h, 2=cfm,
16 bit 0...5
3=l/s, 4=m/s, 5=f/min
16 bit 0...9999 0...9999
16 bit 0...999 0...999
16 bit 0...20 0...20 s
16 bit 0...1 0...1
16 bit 0...2500 0...2500
16 bit 0...30000 0...30000
16 bit 0...999 0...999
16 bit 0...10000 0...10000
16 bit 0...1000 0...1000
16 bit 0...99 0...99
16 bit 0...1000 0...1000
16 bit 0...99 0...99
16 bit 0...100 0...100 %
16 bit 0...1 0...1
16 bit 0...1 0=off, 1=on
16 bit -45...50 -45...50 °C
16 bit -50...45 -50...45 °C
16 bit 0...99 0...99 %
16 bit 0...999 0.0...0.999 %
Data Type Value Range
16 bit 0...1000 100...9900
16 bit -250...2500 -250...2500 Pa
16 bit 0...100 0...100 %
16 bit -500...500 -50...+50 °C
16 bit -500...500 -50...+50 °C
16 bit -500...500 -50...+50 °C
16 bit -500...500 -50...+50 °C
16 bit 0...10000 0...100 m3/s
16 bit 0...30000 0...30000 m3/h
16 bit 0...30000 0...30000 cfm
16 bit 0...3000 0...3000 l/s
16 bit 0...1000 0...100 m/s
16 bit 0...5000 0...5000 f/min
MODBUS REGISTERS
Function code 02 - Read input status
Register Parameter description
1x0001 Input: BIN IN
Function code 05 - Write single coil
Register Parameter description
0x0001 Zeroing function
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 special-
izes in electronic waste.
WARRANTY POLICY
The seller is obligated to provide a warranty of five years for the delivered goods
regarding material and manufacturing. The warranty period is considered to
start on the delivery date of the product. If a defect in raw materials or a pro-
duction 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, in-
correct care or reconstruction, or changes and installation work not done by the
seller. The selection of materials for devices prone to corrosion is the buyer's
responsibility, unless otherwise is legally agreed upon. Should the manufacturer
alter the structure of the device, the seller is not obligated to make comparable
changes to devices already purchased. 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 warranty time. The warranty includes the repair of a defec-
tive 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 compen-
sation for indirect damage.
www.hkinstruments.fi
CONTINUED
Data Type Value Range
Bit 0 0...1 On - Off
Data Type Value Range
Bit 0 0...1 On - Off
Installation version 5.0 2018