Daikin FWP-AT - Инструкция по эксплуатации - Страница 50

FC66003946
Rev 00

USER MANUAL

It is strictly forbidden to reproduce this manual, even par tially

EN

18

FWECSA

Controller for units

“SMALL” NETWORK SOLUTIONS

“SMALL” network solutions constitute a MASTER/SLAVE 
network system where one of the FWECSA controllers 
performs the function of MASTER while all of the other 
FWECSA controllers on the network perform the SLAVE 
function.
It can be set up in two different ways, each with different 
functions and type of connection:

• 

SMALL network on RS485

• 

SMALL network on CONVEYED WAVES

SMALL NETWORK ON RS485

In this case the connection is set up using bus RS485, 
comprised of a twisted 2-conductor, shielded data cable 

(figure 02)

.

For details on how to wire the network, read 
“RS485 NETWORK GUIDE LINES” available in 
the download area of the Daikin website.

The MASTER controller sends the following settings to the 
SLAVE controller:

• 

Operating mode: (COOLING or HEATING);

• 

ON/OFF status of the controller: all of the SLAVE 
controllers switch to the ON/OFF status of the MASTER 
controller;

• 

Enabling minimum room temperature control;

• 

Room temperature SET;

or (based on the "Temperature control from MASTER" 
parameter in the "Networks and Connections" menu):

• 

Limits that apply to changes in the room temperature 
SET (both SUMMER and WINTER): on each SLAVE 
controller, the SET variation is allowed with a delta of ± 
2°C around the value of the SET entered on the MASTER 
controller.

In terms of the ON/OFF status, the following is allowed on 
each SLAVE controller:

• 

Automatic local ON when requested by the minimum 
room air temperature control function.

• 

Automatic local ON/OFF depending on the time slots, 
if enabled;

• 

OFF on SLAVE controller from digital input if it is 
enabled.

Each SLAVE controller maintains its autonomy in managing 
ventilation speed, in switching the ECONOMY function 
on and in setting the SET value (with the limits described 
above).
This type of network does not allow a supervision network 
to be included (External  Supervisor  System solution) as the 
RS485 serial por ts on all of the controllers (both MASTER 
and SLAVE) are already occupied by the SMALL network 
arrangement.
Once the network has been wired, it is necessary to configure 
each FWECSA controller. Press PRG to access the MENU 
and then enter sub-menu “Networks and connections” 
(password = 20). Set the SETUP RS485 parameters as 
follows:

• 

MST/SLV

 = set “Master” on the FWECSA controller 

acting as the MASTER on the network, and set “Local 
Slave” on all of the FWECSA controllers acting as the 
SLAVEs in the network.

• 

Protocol

 = “Modbus”

• 

Serial address

 = set a value between 1 and 255, only 

in the SLAVE controllers.

• 

Speed

 = do not change (9600)

Leave the SETUP OC PARAMETERS UNCHANGED (MST/
SLV = none).

SMALL NETWORK ON CONVEYED WAVES

This type of configuration controls up to a maximum of 32 
hydronic units through a single user unit.
The connection is set up using an OC bus, comprised of a 
twisted 2-conductor, shielded data cable 

(figure 03)

.

In this case, the MASTER controller makes all of the SLAVE 
controllers connected to the network operate (instant by 
instant) in an identical fashion to the MASTER controller itself. 
Accordingly, no SLAVE controller can make autonomous 
decisions, nor 

are they equipped with

 their own user unit.

The maximum number of SLAVE controllers that can be 
connected to this type of network is 32.
Before connecting the I/O boards to the network, each board 
needs to be configured.
Connect the user unit to each I/O board.
Press PRG to access the MENU and then enter sub-menu 
“Networks and connections” (password = 20). Set the OC