Every technical device has limited performance. For the MiniPLC, the original “soft” limitation, or rather reccomendation, was maximum 120 HW data points, which gives about 3 MCIO modules plus some binary input modules to reach the required I/O mix. In this configuration, and with application software typical for the normal HVAC plants, there is absolutely no problem with memory capacity, I/O bus response, web server response, computation cycle and other parameters.
Our customers discovered soon that there is some unleashed power in the Mini, and started to challenge the limits. When increasing the amount of I/Os (and corresponding function blocks in the IDE which serve them) it must be considered that the web server response is slower, and the refresh time in the clients (such as IDE, OPC server, and SCADA) increases, but everything keeps running.
However, one of the unsurpassable limits is the amount of communication channels:
- there may be maximum 3 channels of the same type, and
- the total amount must be less or equal 5.
So, if we have a COM port with I/O modules, a SMS modem, and three Native SoftPLC channels to read the link from other process stations, this is exactly the limit.
- the total number of connections the MiniPLC is able to keep is 10.
This includes those max. 5 channels plus incoming connection from the clients like Vision, IDE, touchscreen, external web panel, Native channels from other PLCs (!) etc.
In case you face a MiniPLC not communicating on some of the channels, even if tests in the IDE are OK, please check the amount and types of the communication channels. (The problem may be somewhere else, too, see also http://domat-int.com/forums/topic/miniplc-nekomunikuje-na-com2)
Those limitations do not apply for the Windows platform (Full).
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The installer includes the Merbon Visual application for industrial iPCs with the Windows operating system for visualizing the user interface. The application is fully compatible with PLCs with both Merbon RT and SoftPLC RT.
Among the catalog sheets in the Downloads section, new catalog sheets have been added for the UI309, UI310 and UI319 communicative room controllers.
- FW v214 for ELT sensor, PCB version D1051_V13
- FW v215 for SenseAir sensor, PCB version D1051_V15
- FW v215 for SenseAir sensor, PCB versionD1176_V11
The training is designed for PLC and SCADA programmers, but also for those who are interested in integrated systems with Modbus RTU and TCP. After completing, the participants will be able to specify, design and commission communication between a 3rd party Modbus device and a PLC or SCADA.
During this training you will learn about the news in the current version of Merbon IDE, the new Merbon IDE hardware, differences against the previous releases of Merbon IDE and the advanced full-featured workflow.
This training will be a basic introduction to the Merbon IDE.