hello everyone :
I am new to GPIB communication.Now i have two gpib card placed in two computers.One is set to be system controller and the other is non-system-controller.On the non-system-controller i use a loop to check the LACS and TACS in ibsta to find out if it is a listener or talker.when the controller writes a string I can recieve it on the non-controller computer.But when the controller read a string,then the non-controller is set to be a talker,however the non-controller can send the string immdiately.So the controller must repeatedly read the string until it gets it.During this process sometimes the controller can never get the string.I don`t know the reason. Why ??