PLC data acquisition
Many machines already have a controller. The monitoring job is to read a documented set of registers and deliver them to the system the buyer already runs.
What has to exist on paper
Protocol: Modbus TCP, a serial map, or another interface the OEM documents. We do not scrape a locked controller.
A tag list with addresses. “All the data” is not a specification.
Whether a gateway may sit on the same Ethernet as the PLC, or must be isolated.
Send with the request
- Controller family if known, otherwise photos of the CPU and ports
- Protocol and a sample of the tag list
- Where the values must go after they are read
Questions buyers actually ask
Will you reverse-engineer a locked PLC?
No. We work from a tag list, an allowed protocol, and access the buyer’s controls engineer can grant.