Most commonly, this will be setup as port number 502. This is done in the Preference screen in the "Settings" menu. The same Modbus Monitor points list is shared during both Master and Slave operation (saving data entry steps).įirst setup the Modbus TCP with the correct server port. Other items in the list without the "Modbus TCP" protocol are ignored. In other words, only Modbus Monitor point with "Modbus TCP" protocol selection will work and do the correct things during server mode. Other protocol and physical medium are not designed to work in the Server/Slave mode of operation. Yes, the Server only talks Modbus TCP protocols. The Server mode of the app turns your Android device into the Modbus TCP Slave (server). The YouTube video also shows how to use this feature. The benefits of Modbus Server can be found in the FAQ page. The Modbus Master Mode is explained in the Modbus Master Page. Technically this mode can be split into new "Modbus Server Android App", but it was decided to add as an option to the main app for convenience and ease of use. The same principles apply to Modbus TCP/IP, which is built on the TCP/IP protocol.The Modbus Monitor Advanced app have many modes of operation known as a Master Mode (Client) and Slave (Server) Mode. ![]() This means it is also possible to program LabVIEW to talk to a Modbus device via serial communications. Modbus is a serial communication protocol. You may get a response if you post your questions on the NI Community Forums. Note: The unsupported Modbus Libraries are not supported by NI. This library may not contain as many features you need as the LabVIEW Modbus API or the supported API included with LabVIEW DSC Module. ![]() Programming with it requires some knowledge of Modbus function calls to program. The Modbus Library for LabVIEW is a wrapper for VISA commands. It is intended as a replacement and expansion of the free Modbus library functionality that supports versions of LabVIEW before 2012. The LabVIEW Modbus API is the latest release of the free LabVIEW Modbus Library. Unsupported Modbus Library (boxed in green in the screenshot above) To learn more about using DataSockets to connect to OPC Servers, take a look at the tutorial on connecting LabVIEW to an OPC server using front panel DataSockets. ![]() If you do not have an OPC Server, NI OPC Servers provides an interface to many protocols, including Modbus. If you are using LabVIEW on Windows, you can also use DataSockets to communicate with an OPC Server that can communicate with Modbus. The supported Modbus API is included in the LabVIEW DSC Module and the LabVIEW Real-Time Module. Everything must be done manually when using this low-level API. ![]() The supported Modbus API provides fine control over the Modbus protocol, with high performance. Supported Modbus API (boxed in blue in the screenshot above) In exchange for ease of use, Modbus I/O Servers do not have the fine control that the supported LabIVEW Modbus API has over the Modbus protocol that can be required for some applications. Modbus I/O Servers is included in the LabVIEW DSC Module and the LabVIEW Real-Time Module. Modbus I/O Servers provide a simple way to access and write Modbus data in LabVIEW. The Modbus I/O Server allows you to easily link Modbus register values to Shared Variables that you can use in your LabVIEW VIs.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |