R5-H
Smart
12
All rights to changes reserved.
2020-11-11
4. Units external connections
4.1 Modbus
Unit has in build Modbus RTU interface (slave) and it’s
available in a SEC* or SEM* module. SEC IO-extension
cable Modbus interface is designed for single point
connection. SEM IO-extension module Modbus interface
is designed for easy connection to large network with in
and out connectors for A, B and for two shield or ground
connectors.
Installation
Install Modbus network cabling as described in external
connections diagram.
NOTE! Install bus termination to chains last unit (in SEM
use bus terminated jumper, JP1).
NOTE! Shielded cable must be grounded only from one
point (master). SEM has two internally connected connec-
tors for shield/ground chaining.
Settings
Modbus settings can be changed in
Settings
/
(1234)/
Modbus
menu.
Modbus
Address
Baud
1
Data bits
38 400
Stop bits
8
Parity
1
Smart Access
None
If Smart Access is connected to the SEC/SEM module
select Smart Access for correct settings. Normally Smart
Access cable should be connected inside electrical box.
Register access
Modbus registers defined in registers list are direct ac-
cessible without password. All defined registers are PLC
addresses (base 1). Most commonly used registers are
listed below.
Holding control registers
4x5001
38 400
Operating mode
0 = Stop
1 = Away
2 = Home
3 = Boost
4 = Travelling
4x5018
38 400
Emergency stop
0 = Disabled
1 = Active
2 = Over
pressurising
4x5101 Temperature setpoint °C
4x5406 Reset all alarms
1 = Reset
This section contains information to connect ventilation unit to external devices or system. The unit has in build Modbus
RTU interface to complete control. The units operating modes and functions can be controlled with switch inputs (DI)
or with voltage (0...10 V). The unit state can be monitored from relay outputs or voltage output (0...10 V).
*) Accessory
Input registers
3x6201 Fresh air temperature 0,1 °C
3x6203 Supply air temperature 0,1 °C
3x6204 Extract air temperature 0,1 °C
3x6213 CO2
PPM
3x6214 RH
%
3x6217 VOC
PPM eqv.
3x6205 Supply fan RPM
1/s
3x6206 Extract fan RPM
1/s
3x6301 Unit state
0 = Ext. stop
1 = User stop
2 = Start
3 = Normal
4 = Commissioning
3x6302 Operating mode
0 = Stop
1 = Away
2 = Home
3 = Boost
4 = Travelling
3x6136 Combined alarm
See full list
3x6137 Combined info
See full list
Full register list:
www.swegonhomesolutions.com
