Hello DeltaV community,
I have a question regarding interfacing to external systems. We are installing an analyzer here at our plant, that comes with its own computer that has the software, data., etc.Is there a way to interface with this computer and poll tags from it into the DeltaV? I believe it is a sql server database but I could be wrong. Generally speaking, what are my options to pull data from another computer into a DeltaV system? Trying to set up an interface such that i can display & use of this data in the DeltaV.
Thanks in advance!
I can't help you "roll your own" but you could ask your analyzer specifier / purchaser to specify that the analyzer PC is provided with a serial port and all the services to function as a Modbus slave. I agree with Mr. Bahtimy that this is best left to the vendor - chances are they have done so for other customers. My personal preference is Modbus RTU through a serial card for a relatively uncomplicated analyzer. As I recall the serial cards are licensed per card, and then each "dataset" you configure is a DST. A gas chromatograph might have three datasets, one for concentration data (results), one for alarms (discretes) and one for things like "time of analysis". Cheap and robust compared to OPC Mirror in my experience.
In reply to Youssef.El-Bahtimy: