For my project, I'm looking to be able to read/write values to the PLC from the web. Avoiding use of a PC connected to the PLC is preferred.
This thread was pretty informative, but I need some clarification on certain topics.
I understand the many PLCs have 3rd party drivers for TCP/IP ethernet automation. What is the difference between these and an "OPC Server" or "RSLinx"? Can any of these be embedded into a web application? Links to other drivers would be great as well.
How does one VPN to a PLC? Is there some device that you place between the PLC and the internet drop that actually has an IP address? I'm not sure how the PLC can be assigned an IP without some external device.
I am open to suggestion for PLCs (as well as other devices) that would make this task easier. I looked for the E-Series Terminal that Steve Wood suggested in the previously mentioned thread but there was no mention of the E-View software.
Thanks guys.
This thread was pretty informative, but I need some clarification on certain topics.
I understand the many PLCs have 3rd party drivers for TCP/IP ethernet automation. What is the difference between these and an "OPC Server" or "RSLinx"? Can any of these be embedded into a web application? Links to other drivers would be great as well.
How does one VPN to a PLC? Is there some device that you place between the PLC and the internet drop that actually has an IP address? I'm not sure how the PLC can be assigned an IP without some external device.
I am open to suggestion for PLCs (as well as other devices) that would make this task easier. I looked for the E-Series Terminal that Steve Wood suggested in the previously mentioned thread but there was no mention of the E-View software.
Thanks guys.
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