Modbus
CS3000 AWP – 6721852570 (2023/04)
72
The address of the unit is shown on display “DSP1” on the main keypad.
Addressing controls
A maximum of 16 controls can be addressed, with address from 0 to 15;
so for example:
• 16 units with relative controller on board, the master with address 0,
the slave, in read-only mode, with subsequent ones
• 5 units with relative controller on board + a remote controller as the
master
Press or to select SETTING ADDRESS.
Press or to set the address.
Press OK to confirm.
Fig. 105
Remote ON-OFF
With the units in modular configuration, remote control must be applied
to the master unit, which transmits it to the slave units.
14.2 Start-up
Complete system management is carried out by the master unit,
identified by address 0.
Thermoregulation takes place on the supply temperature of the entire
system (Tw).
At switch-on, when a load is requested, the units are switched on in
sequence based on their address, in numerical order.
When the load decreases, the units are switched off following the same
sequence.
Example in cooling
If Tw >= set point + 10°C:
• The control activates 50% of the resources in sequence based on the
set address;
• After a time interval (default: 240 seconds);
• If the load increases, additional resources are activated;
• If the load decreases, the units are switched off following the same
sequence (first start, first stop);
If Tw < set point + 10°C (in cooling):
• The control activates only the master unit;
• After a time interval (default: 240 seconds);
• If the load increases, additional resources are activated based on the
set address;
• If the load decreases, the master unit switches off.
15 Modbus
15.1 Overview of service functions
Communication specification: RS - 485
Table 61
Function codes
Table 62
Fig. 106
Connections
Connect on the back of the controller.
Modular unit: connect the modbus to the MASTER unit port.
SERVICE MENU
STATE QUERY
CLEAR HISTORY ERRORS
SETTING ADDRESS
1/3
HEAT CONTROL
0010045013-001
SETTING ADDRESS
CONTROLLER ADDRESS
CONTROL ENABLE
MODBUS ENABLE
OK
YES
NO
0 #
MODBUS ADDRESS 1
#
0010045014-001
Protocol ModbusRTU: 9600, 8,
N,1
Baud rate 9600bps
Data bits 8 Data bits
Parity bit None parity
Stop bit 1 stop bit
01 Query
03 Reading
06 Single register writing
16 Multiple register writing
12/04/2019 MON
COOL
45 ºC 60%
ONLINE
UNITES
ERRORE
ON
10:35A
16
E1
TWS 55 ºC
TW 55 ºC
T5
55 ºC
WEEKLY TIMER ON TIMER ON
H1
H2
-
+
0010045015-001
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