Start-Up; Modbus - Bosch CS 3000 AWP Installations- Und Bedienungsanleitung

SETTING ADDRESS
CONTROLLER ADDRESS
CONTROL ENABLE
MODBUS ENABLE
MODBUS ADDRESS
OK
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.
CS3000 AWP – 6721852570 (2022/11)
15
15.1
0 # Communication specification: RS - 485
Protocol
YES
Baud rate
NO
Data bits
Parity bit
1
#
Stop bit
Table 55
Function codes
01
03
0010045014-001
06
16
Table 56
Fig. 118
Connections
Connect on the back of the controller.
Modular unit: connect the modbus to the MASTER unit port.
Enabling
Press Menu +
or
Service Menu > Setting Address >Modbus enable > YES
Reading register, writing a single register, multiple register writing.

Modbus

Overview of service functions
ModbusRTU: 9600, 8, N,1
9600bps
8 Data bits
None parity
1 stop bit
Query
Reading
Single register writing
Multiple register writing
for 3 seconds
Modbus
79