smiller
Member
Hello, I am having a problem connecting to my Modicon 984 series PLC's via Modbus with Taylor software. I have a Dell Latitude computer and XP. I have heard that Dell uses a virtual serial port which I don't fully understand but I think that it has to do with the IRQ address assignment to the port when it is needed. Whan I try to connect, the Modbus light flashes on the PLC and then comms time out. I can use the Modbus port ok with Concept software and Quantum/Momentum PLC's but the 984's are hosed. I have adjusted all of the comm port settings on the PC with no change. Any suggestions are appreciated.