Kestas

Dear Sir, Yesterday I tested with another PLC (M90), but situation is the same... Kestas

Settings of 9600>even>1>7>none not working.

Dear Sir, Thank You for quick answer. I am using 64 bits version of Windows 8. I am reinstalled prolific driver (from https://unitronics.exavault.com/share/view/1j3m-glck37nv-1lljo5h ) as You recommended, but situation is the same. In the Device Manager, Prolific USB-to-Serial Com Port (COM5), set correct. When I checked with "Check PL-2303 chip version v1002" com port 5 I get: This is a PL-2303 RA chip. In the U90 Ladder I set Baud rate-9600, Parity-None; Stop Bits-1; Data Bits-8 and Flow Control- None, com 5 (the same configurations are in Prolific settings). Then I trying to get PLC settings, I am got error- (2) U90Ladder: Communications could not be established due to one of the following: *Cable connections are not secure. *Timeout is too short. Incorrect communication settings. Check your cables and communication settings and try again. Kestas

Hi, This is my first topic in this forum I have question about U90 Ladder and windows8. I cannot connect my Laptop to Unitronics M91-2-R34 (checked all possible variations of ports, baud rates, stop bits and so on). User Account Control (UAC) settings is turned off. I am using Prolific USB to Serial converter. This converter can work with windows 8. Is U90 Ladder working with windows 8? Perhaps somebody can help for me... Kestas