Heat curtains automation design
We have completed design, installation, programming and commissioning of the heat curtains automation system for the warehouse complex.
BACS. HEAT CURTAINS CONTROL DESIGN.
Initial data of the automation project
The drawings of heating curtains automation is based on the following documents:
- contract;
- Terms of Reference of related sections;
- technological and construction drawings;
- current normative documents.
Taking into account the main purpose of the building, the project provides for the possibility of further expansion of the network of dispatching and automation of engineering equipment. Additional control and monitoring panels with the necessary equipment can be located in the technical premises of the warehouse complex.
The design includes:
- automation of heat curtain systems and heating units;
The automation system is a network of control, freely programmable controllers installed in switchboards (together with the power part).
Communication between controllers and external devices (drives, sensors) is carried out with the help of shielded cables, whose shields are properly grounded to avoid induced currents. Laying of cables of the automation system is carried out in separate metal trays, at a distance of at least 200 mm. from the power wiring, and from the trays to the units in a metal tube, diameter 16, 20, mm.
In addition to remote and automatic control of units, "local" control directly from the control panel is provided; in addition, the project provides for the installation of safety switches at the location of units remote from the panel (pumps, fans of general ventilation).
Basic automation solutions using Honeywell equipment.
To solve the automation tasks of the heat curtains and heating units, the project uses a set of tools from Honeywell.
The complex includes:
- freely programmable, multi-functional microprocessor controllers EXCEL 500;
- communication device between personal computer and controllers - BNA;
In the premises of heat curtains and heating units it is assumed to install electrical panels with built-in controllers.
System control provides three modes:
- Local control of electric motors of curtains and from control panels.
- Remote control (from the control room).
- Automatic control of the systems.
Automatic control is carried out according to a preset program stored in the controller.
In order to put the unit or the whole system into local control mode, it is necessary to set the relevant switch or all the switches on the control panel to the "On" position.
The local control mode should only be used when debugging systems and in emergencies.
Automation board panel with EXCEL500 controllers provides:
- starting up all units of the system in a certain combination and sequence;
- implementation of the necessary regulation rules and control.
- interlocking dependencies;
- control of the equipment status (enabled/disabled, failure);
- remote activation / deactivation of systems from the centralised control unit;
- Transmission of alarm and statistical information of current technological
Solutions for air curtains and heating units automation.
To solve the problems of heat curtains and heating units automation control, a complex of means using combined electrical control and automation boards. The complex includes:
- Control and automation electric boards with built-in controllers located at the place of installation of serviced equipment. Power supply characteristics of switchboards.
- information exchange bus between controllers (C-BUS), which physically is a two-wire communication line.
The automation of the air curtains and heating units is provided for:
- Control of the heat curtains and heating units systems (on/off) from the dispatcher's workplace or automatically by the signals of the warehouse doors opening.
The control panels of the heat curtains and heating units provide for connection of an external signal from the control panel. Disconnection of consumers of the panel, in order to improve reliability, is carried out at the "relay level", i.e. even when the consumers work in manual or remote mode, there should be guaranteed disconnection of them.