I have purchased the serial card, I installed it and installed the drivers, but I cannot find anywhere how to change the mode to RS485. I need to use this board for ModBus Communication, and it will only work with RS485. I have used Pins 1,2 and 5 where 1 is Data -, 2 is Data +, and 5 is GND. I connect it to the modbus cards but I get no Communication.
We are having trouble getting the system to recognize the parallel port for a securtiy lock. our device id is: PCI\VEN_1FD4&DEV_1999&SUBSYS_01011FD4&REV_00. Ihave attached the screen shot of the error we are getting. Dell believes we need to reinstall the driver, but i am unsure of which driver to download and the actual process required to maintain system integrity. Any help is greatly appreciated.