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RS-485 serial port on PC? - Control. com One can buy RS-485 add-in cards for a PC, but my experience shows using an external RS-232 485 converter GREATLY simplifies changing to a new PC or even using a notebook as a temporary replacement for the main PC With an internal card, you'll need to open the PC, move the card, and likely FIND where you put the stupid CD floppy with the driver
Making Modbus device communicate with a PC - Control. com In my case the requirement is to gather data from devices that support MODBUS RTU protocol and display it on a PC or display The device has both RS 485 and RS 232 ports for serial communication
How to wire 3 Wire Modbus RTU to PC DB9 - Control. com What device has the DB9 connector? Your PC? A USB to RS-485 converter? DB9 is more commonly used for RS-232 You cannot directly connect RS-485 and RS-232 together
How to communicate between RS485 over ethernet to LAN port on computer At best, connecting this RS-485 port to a computer's Ethernet port will result in no communication At worst, you could damage your computer's Ethernet port I've seen manufacturers use RJ-45 connectors like this for RS-485, but they put voltage on some of the pins, which could damage any Ethernet device connected to the port
How to transfer data PLC to PC through RS232 or 485 Hi, Would you pls give me some insight on how to trasnfer data from PLC to PC Suppose I have any PLC, at its basic let us programme with ladder logic How do I have communicate my CP with this PLC to pick up WX or WY as well as DI or DO without using any PLC programming language In
Siemens PPI and MPI connections through RS-485 - Control. com I would like to know if an off-the-shelf RS-232 to RS-485 converter can be used to connect a PC with the Siemens programming software for the S7 family to a Siemens PLC S7 200 (using PPI) and S7 300 400 using MPI Thank you all in advance, Juan
How-To: Building a PLC Project with Modbus Communication How-To: Building a PLC Project with Modbus Communication Modbus is a communication protocol stemming from the early days of Modicon PLCs, but is still common today These two example implementations of Modbus transactions will get you started
DH-485 DB9 pinout | Automation Control Engineering Forum I have a ControlLogix PLC with serial DB9 port It´s suppoused to be configured as DH-485 for comm with a Panel View Since it´s a bad idea change the PC port every time I want to change any of the programs, putting an AIC+ converter I pretend to get PC into the DH-485 network, but I don´t know