A
I am newbie. In our plant used S7 CPU 319-3 PN/DP and HMI (writing on Visual basic). There is OPC (delta logic) server in HMI. Problem is that some data are in HMI are not same as HMI and when changed the parameter then it is not changing in PLC and vice versa.
Could anyone tell me how visual basic program exchange data with PLC. or How the way of the solving the problem? or Is it hardware or software issue ?
Thank you
Could anyone tell me how visual basic program exchange data with PLC. or How the way of the solving the problem? or Is it hardware or software issue ?
Thank you