Hello
I have questions about the Modbus TCP / IP Driver.
How many Modbus TCP / IP drivers can be created in WinCC OA3.14?
And how many devices can communicate with one driver?
questions about Modbus TCP / IP Driver
- Gertjan van Schijndel
- Posts:634
- Joined: Mon Aug 02, 2010 10:37 am
Re: questions about Modbus TCP / IP Driver
In theory a single WinCC OA system can have up to 255 (Modbus/TCP) drivers and for the Modbus/TCP driver 65536 devices can be configured in total.
But the environment of the WinCC OA system could limit the ability to reach these WinCC OA limits.
Also the value changes of all these devices must be handled by the event manager, which could become a bottleneck.
To handle a large number of devices it might be better to create a distributed system, so the load can be divided over multiple event managers.
How many devices do you need to connect?
How many value changes per second do these devices generate (after old/new comparison and smoothing)?
But the environment of the WinCC OA system could limit the ability to reach these WinCC OA limits.
Also the value changes of all these devices must be handled by the event manager, which could become a bottleneck.
To handle a large number of devices it might be better to create a distributed system, so the load can be divided over multiple event managers.
How many devices do you need to connect?
How many value changes per second do these devices generate (after old/new comparison and smoothing)?