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Control, Connection to the Master System
Controller HW and SW Concept
The core of the VCS system is created by a powerful Siemens
Climatix series PLC controller. The control unit can be equipped
with one of two POL4xx and POL6xx controller versions
depending on the components used in the air-handling unit.
Simultaneously, additional external input/output or commu-
nication modules can be connected to the POL6xx controller.
For local control, the HMI-SG POL822/60 hand controller
can be used. The control unit allows up to 8 basic control
sequences to be used depending on the air-handling unit
configuration. The order of some sequences can be changed
(e.g. heating-mixing damper or cooling-fan cooling).
The heat pump or electric after-heater can be separated from
basic sequences in the so-called extra sequences.
If this is the case, another sensor must be used in the air inlet,
and a special set-point must be set for this type of control.
This feature can only be used after prior consultation with the
manufacturer. These units are delivered adapted to individual
applications so they will provide exactly those features needed
for the operation of a specific air-handling device.
Control
Local control
The basic VCS controllers are devices (manual controllers
with bus connection) for so-called local control of the control
unit (see fig. 2):
a) Room controller - HMI-SG (POL822/60)
b) Comfortable universal alphanumeric driver
- HMI-DM nebo HMI-TM
Note: For details, see controllers instructions part of the
manual.
Note: For some unit configurations, HMI-SG is not satisfactory
and HMI-TM/DM is required (e.g. pool units, others according
to information in design SW for VCS configuration).
Figure 3 – local HMI controllers
HMI-SG
Distant control
In addition to local VCS controllers, so-called remote control
can be used (Fig. 4). For this control, you need to connect
VCS to LAN, WAN or Internet (For production, the control unit
must be configured/ordered with the required functionality).
a) HMI@WEB - Using the web interface, it is possible to
utilize HMI@WEB control. The control functionality fully cor-
responds to the local HMI-DM and TM controllers. For more
details, see page 41.
b) Mobile app (see fig. 3, more details on page 47) - You can
use simple touch application for smartphones or tablets with
4
HMI-TM
HMI-DM
Google Android (v. 4.1 and higher) or Apple iOS (v. 12.2 and
higher), or application for PC with Windows 64bit.
c) AHU unit operation visualization
Monitoring and operation using the device's technological
scheme with operating parameters, respectively using the
tabular interface of an internet browser on a PC. For details,
refer to page 58.
Figure 4 – options for remote control (via LAN)
Other controls (technological)
For basic control (triggering, mode switching)
from a technology or a very simple manual button / switch
control, you can use "Other Controls". External control via one
or two non-voltage contacts.
Control from master system
When integrating HVAC with the VCS control unit into complex
building management systems (BMS), it is also possible to
connect to these systems.
Subsequently, it is possible to control and monitor the HVAC
through them. The ModBus, LON, and BacNet standards
can be used.
The different types of control must be designed when design-
ing (configuring) VCS into the project and especially in produc-
tion - the usability of remote control and connectivity to the
BMS are dependent on the use of the corresponding controller.
Detailed descriptions of all controller types, control and their
use - see separate sections / chapters of this manual.
Connection to master system
(BMS/BACS)
The VCS control unit can be optionally integrated into Build-
ing Management Systems (BMS) or Building Automation
Control Systems (BACS) through various networking options,
including LAN (Ethernet) and serial industrial communication
buses (RS485, or LonWorks) with the following protocols:
n
Modbus (TCP/IP nebo RTU)
n
BACnet IP
LonTalk
n
Subsequently, it is possible to monitor and control the air
handling unit through the integrated connection with the
Building Management System (BMS). This connectivity option
needs to be configured in the AHU+MaR design software. The
usability of remote control and compatibility with BMS depend
on the use of an appropriate controller.
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