63
■
Changeover command, heating/cooling: This input
facilitates the changeover to cooling mode
■
Open
= heating mode
■
Closed
= cooling mode
■
The changeover signal and the 2 enable signals are
not evaluated if the Modbus handles the control
■
The corresponding Modbus parameters are:
■
"HP
-
enable
-
bit1" (1 = enabled)
■
"HP
-
enable
-
bit2" (1 = enabled)
■
"ExtDemandHeatingCooling" (1 = cooling)
■
"Ext set value" (-10 = -10 °C or if the minimum value
for the selected configuration is not this low, only the
permissible minimum value is set. 100 = 100 °C or if
the maximum value of the selected heat pump is
lower, then the maximum value of the selected heat
pump).
Heating/cooling
■
"Only heating"
: The cooling function is switched off.
Setpoint configuration
■
"Setpoint external"
: The set flow temperature is
specified directly by external means or via Modbus.
■
"Set value fixed:"
: The set values for heating and
cooling are fixed if this is selected.
■
"No setpoint"
: The number of enabled compressors
runs for as long as they are enabled, provided that
there is no alarm signal.
Min. pause time in minutes
■
Min. pause duration following the last shutdown
Electrical connections for external control
Signal
Scheme page
E-scheme con-
nection
Enable signal 1
19
19 x 4
Enable signal 2
19
19 x 6
Signal
Scheme page
E-scheme con-
nection
Changeover
command, heat-
ing/cooling
19
19 x 8
Set value, ana-
logue signal
18
18 x 4
1.3.2. Communication
Some controller operating parameters can be called up
and adjusted via Modbus or BACnet. In the case of
BACnet, Modbus TCP and Modbus UDP, ensure that
the same IP address is used as shown on the display.
1.3.3 Communication Ethernet
The Ethernet and BACnet settings apply to web serv-
ers, Modbus UDP and Modbus TCP.
Note
After the Ethernet address has been changed, the dis-
play connected to Ethernet loses its connection with
the controller.
In order to preserve the display function, enter the new
controller IP address in the display setup:
■
Tap an empty section on the screen until the setup
menu is displayed
■
Select
"Web Connection"
■
Select
"Remote host IP"
■
Enter the new IP address and select
"OK"
■
Select the symbol for
"Back"
twice
■
Select
"Save"
■
Select
å
■
Select
"Login"
■
Enter the password and select
"Configuration"
■
Select
"Parameters of sys.controller"
■
Select
"Settings Ethernet"
Commissioning, inspection, maintenance
Commissioning the system
(cont.)
5549 991 GB
Summary of Contents for 301.BS090
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