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7
NETWORKS AND CONNECTIVITY
FWTOUCH offers the possibility to interface in
networks of the type:
1. RS485 network with monitoring software.
See figure 11.1 p. 144
7.1 CONNECTION TO MONITORING SYSTEM
Through the RS485 serial port it is possible to
connect the FWTOUCH controllers (up to 247
hydronic indoor units) to a management soft-
ware programme that uses the MODBUS RTU
standard as communication protocol with the
following features:
Ū Settable baud rate (default: 9600);
Ū no parity
Ū 8 data bits
Ū 1 stop bit
Within a monitoring network, each FWTOUCH
controller behaves like a SLAVE towards the cen-
tralised management system that constitutes
the MASTER of the (see figure) 11.1 p. 144
network.
Once you have wired the network, you must
configure each FWTOUCH controller. Enter the
list of network and connection parameters (ac-
cessible via the key in the USER MENU) and set
the RS485 SETUP parameters as follows:
Ū MST/SLV = "Slave from SPV"
Ū Protocol = "Modbus"
» Coil status (digital read/write)
Description
ON/OFF controller
1
SUMMER/WINTER controller
2
ECONOMY controller
3
ANTIFREEZE ENABLING controller
4
HEATING ELEMENTS ENABLING controller
5
modulating fan MAN/AUTO controller
6
ON/OFF enabling from MASTER
7
ECONOMY enabling from MASTER
8
SUMMER/WINTER enabling from MASTER
9
ANTIFREEZE enabling from MASTER
10
» Input status (digital read-only)
Description
Hydronic indoor unit ON/OFF
1
SUMMER/WINTER
2
2. SMALL network: SMALL RS485 network and
SMALL power-line communication network
3. MIXED network (Supervisor+ PLC or RS485 +
PLC) 11.4 p. 144
Ū Serial address = set a value from 1 to 255
Ū Speed = set according to the needs of the
Master, leave the PLC SETUP parameters un-
changed (MST/SLV = none).
INFO:
for details on the network wiring it is
recommended to read the document "RS485
network guidelines", available in the Daikin
website's download area.
The functions recognized and managed by the
controller as SLAVE are the following:
Code
Description
coil status reading
01
input status reading
02
holding register reading
03
input register reading
04
coil status multiple writing
15
holding register multiple writing
16
WARNING: As a result of the use of different
MODBUS protocol standards, the addresses
shown in the following tables may differ by
one unit.
The following are the available variables:
Description
HEATING ELEMENTS enabling from MASTER
11
SET-POINTS enabling from MASTER
12
SET-POINT LIMITS enabling from MASTER
13
FAN SPEED enabling from MASTER
14
KEYPAD LOCK controller
15
HUMIDITY CONTROL enabling signal from MASTER
16
HUMIDITY CONTROL enabling
17
CONFIGURABLE DIGITAL OUTPUT NO7 controller
18
Enable control for TIME SLOTS
19
Description
ECONOMY active
3
ANTIFREEZE active
4
17
FC66006287
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