I'm currently having some trouble in allowing the PVC400 component to communicate with the micro820 PLC. I am trying to alter the digital inputs of the plc with pushbuttons that are represented on the PVC400 however when any of the buttons are pressed the error "10:Write Error for Alias XXX, Controller PLC-1, Address is _IO_EM_DI_00, Communication Flag is 0" is shown. I have the PLC set up as slave however this seems to have made no difference. Is it possible to alter digital inputs using the AB PVC400? I am currently using CCW to program this set up.