John Gaunt
Member
I have a customer who wants a major upgrade to a system I installed in 2000. It will be mostly a start again job with new panels but reusing some equipment. There will be 23 PID Cooling control loops that are to be MM430 Drives connected to a S7 CPU using Profibus. Can I chain all these drives to just one profibus port. I plan to use CPU 6ES7-414-2XK05-0AB0 but this is not yet final. I plan to use the other CPU port for communications to Citect SCADA. The system will also have 63 other PID controllers using a mix of Increase Decrease Digital Outputs to Electric Actuators and 4-20 mA outputs to Pneumatic Actuators.
I understand there is a limit to the number of Profibus devices but don't have any details.
I understand there is a limit to the number of Profibus devices but don't have any details.
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