iSMA-B-FCU Quick Start-up
www.ismacontrolli.com
DMP245en | 1st Issue rev. 1 | 04/2022
page 7 of 56
Steps 3-8 describe configuration of the CFG DIP switch. Their overview with default
positioning is presented in the table below.
No.
Name
On
Off
Default
1
Pipe Mode
2-pipe
4-pipe
4-pipe
2
Heating 2
nd
Stage
Enable Disable Disable
3
Cooling 2
nd
Stage
Enable Disable Disable
4
Heating/cooling control mode Analog Digital
Digital
Table 2. The CFG DIP switch configuration
3.2 Step 1: Selecting Protocol and Baud Rate; Restoring the Default
Settings
3.2.1 PROTOCOL DIP Switch Configuration
Depending on the communication protocol, used within the network the controller is
connected to, there is a possibility to switch the protocol used by the controller so it
matches the network protocol.
The protocol, which the controller operates with, and baud rate selection is made with
the PROTOCOL DIP switch.
The 1
st
, 2
nd
, and 3
rd
switches are responsible for baud rate, while the 4
th
and 5
th
are
responsible for the protocol. The 6
th
switch is responsible for restoring the default
settings.
The PROTOCOL DIP switch settings for baud rate and protocol selection are shown in
tables below.
1
2
3
Baud Rate
OFF (0)
OFF (0)
OFF (0)
Defined by user
OFF (0)
OFF (0)
ON (1)
76800
OFF (0)
ON (1)
OFF (0)
4800
OFF (0)
ON (1)
ON (1)
9600
ON (1)
OFF (0)
OFF (0)
19200
WARNING!
Before attempting to configure the controller, make sure to have
acquainted with all the required documentation, or have a good knowledge of the fan
coil unit
application–
this will make configuration of the controller easy-going and
trouble-free.
