GPRS (3G/4G supported) Communication between two AC500 controllers
How can I establish GPRS (3G/4G supported) Communication between two AC500 controllers, with it's possibilities and limitations.
As per customer requirement, they required bidirectional operation (Operation & status) of remotely situated machines.
thanks in advance.
I'd say that lies not on PLC level but rather on level of GSM router. If you alredy choosed the router you schould check if it supports VPN point-to-point connection. After two routers establishes connection between each other you can use any type of IP communication between two PLCs.
There's also other way - some GSM carriers offer special M2M (could be named differently) plans, which isolate all devices inside virtual private network with static IPs. It this case you can use known IP address to communicate between AC500 controllers.
Hope it helps!