ControlSystems
Lifetime Supporting Member
Hopefulluly someone out there has solved this... We have a new Modicon M221 Nano performing Read_Var messaging from remote radios. On my test bench the stripped down test plc program reads and writes data over the Modbus TCP network at about 200us. The full program when loaded onto this processor runs at about 2000us! There isnt that much messaging and there is no physical IO used in the full program. I'm new to this Nano family of controllers, is it possible we are just asking too much of the M221 processor? Any advice on that would be appreciated before I rush out to buy the next up class of Modicon processor...