Free programmable controller with multiple I/O - MIDAM DMAXI00
Free programmable process station equipped with with MPC5200 processor and Linux operating system. It is suitable for control of extensive HVAC installations, home automation or field data acquisition. It features one Ethernet port, two RS232 interfaces, and two RS485 interfaces for expanding I/O modules, 16 AI, 32 DI, 8 AO, and 32 DOs as well as integrated web interface. The enclosure body is made of painted steel for extra durability.
- Freely programmable process station
- MPC5200 processor and Linux operating system
- 16 analog inputs and 32 digital inputs
- 8 analog outputs and 32 digital outputs
- Made of painted steel ⇒ high mechanical durability
Function
The DMAXI00 controller possesses an embedded Linux operating system which boots up the runtime with the application. It features 16 AI, 32 DI, 8 AO and 32 DO which makes the device suitable for control of installations up to approximately 500 physical data points (with extension IO modules). There is a RTC backed up with battery, flash memory containing OS, runtime, application, and other necessary data like time programs, setpoints etc., as well as a watchdog. It is also possible to use NVRAM as a backup for key parameters in case of unexpected system shutdown or connectivity drop. The application is created and uploaded in the integrated development environment (IDE). The complexity of application program size depends on number of physical and software data points, amount of function blocks which require more memory (e.g. time schedulers), level of code optimisation, and number of connections the controller is supposed to maintain. It contains one Ethernet (RJ45) two RS232 and two RS485 ports for seamless communication with other control devices. It features an integrated web server for remote connection and direct user intervention. The web pages can be created in WEB-PLC editor. The user menu structure as well as the exported web definition components are uploaded to the PLC through IDE (refer to Web definition in PLC properties). The web functionality as such is intended for operation in a local network. Therefore it is recommended to integrate any appropriate web router or other element that will ensure or add extra network security. The enclosure body is made of sheet steel which provides high durability when mounted on the base plate of the switchboard, or on another flat and smooth surface using fixtures delivered together with the device.
Application
- Freely programmable control of common HVAC systems
- Web access and visualization of HVAC systems
- Direct control through multiple inputs/outputs
- Data acquisition, processing, and presentation
- Protocol converters with web data presentation
Programming
The main programming tool is the IDE package which contains I/O editor, graphical editor of the function plan (FBD), structure text editor (according to IEC 61131-3) and compiler. The application program consists of function blocks which are stored in libraries. Those contain analogue and digital functions, mathematical blocks including goniometric functions, time schedulers, alarm blocks, and HVAC specific blocks (heat recovery, dewpoint calculation, enthalpy, pump switch etc.). The program can be set up also as structured text (ST) or with combination of both types of programming languages. The IDE package contains LCD menu editor as well as web editor (HMI).
SCADA system integration
Direct integration into various SCADA systems through wired Modbus TCP, OPC UA, or BACnet/IP (RJ45) protocols is possible.