Wireless FreeRTOS programmable controller - MIDAM W00192
Free programmable process station equipped with i.MX RT processor and FreeRTOS/Cloudbow operating system. It is suitable for control of small installations or data acquisition. It features one Ethernet, one RS485 port, AES 128 encrypted Midam KFP protocol as well as integrated web interface.
- Freely programmable
- i.MX RT processor
- FreeRTOS / Cloudbow operating system
- Suitable for control of small installations or data collection
Function
The W00192 controller possesses an embedded FreeRTOS operating system which may boot up the runtime with the application. There is a RTC backed up with battery, flash memory containing OS, runtime, application, and othernecessary data like time programs, setpoints etc., and a watchdog as well. 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 RS485 and one Ethernet (RJ45) port for seamless communication with other control devices. The PLC features an integrated web server for remote connection and direct user intervention. The web pages are created in HMI editor, which is included in the package of development programs supplied by the manufacturer. The exported web definition components are uploaded to the PLC through IDE (refer to Web definition in PLC properties). The W00192 embeds AES 128-bit, the most secure encryption standard for wireless connections. It can work in two modes, direct communication or cached mode. Each device is mapped to Modbus RTU register area. Up to 75 devices can be mapped with configurable offset and length. Communication status is available through timestamp, comm error and status.
Application
- Freely programmable control of standard HVAC systems
- Web access and visualization of HVAC systems
- Data collection, processing, and presentation
- Protocol converter with web-based data presentation
- Standard application with advanced networking features
- Modbus RTU to Midam KFP wireless protocol conversion
- Integration of up to 75 Midam KFP devices
- Integration of up to 75 WMbus devices
- Wired or wireless integration into SCADA systems
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 also LCD menu editor as well as web editor (HMI).
Optional KFP wireless communication
Wireless communication is based on the license-free 868 MHz band and uses a higher radio frequency transmitter power of up to +20 dBm. The W00192 includes 128-bit AES encryption, currently one of the most secure standards for wireless communication, and is compatible with a wide range of devices from the Midam KFP wireless system.
SCADA system integration
Direct integration into various SCADA systems through wired Modbus TCP, OPC UA, or BACnet/IP (RJ45) protocols is possible.
Midam KFP Password change
Prior to the first use, the encryption password (default “MIKROKLIMA1234AB”) must be changed using the WUSB01 configuration dongle and the relevant software tool.