Example 1 While troubleshooting a PROFIBUS network last week, I learned that Emerson’s Delta V PROFIBUS controllers are a bit different from what I expected. The number of devices this controller DeltaV™ S-series PROFIBUS DP Interface Card supports is 64 vs. the 128 that are available. There are likely many networks that have fewer than….
I had a call from a customer, working with some client supplied equipment. In difficult economic times it is natural for customers to do what they can to reduce costs. Using existing inventory or sourcing used equipment is a common occurrence. Our customer mentioned they were not able get the 83F’s to communicate to their….
Lessons from the field on external noise, ghost flows, and data validation. We received a call from a customer about an Endress + Hauser Coriolis meter mounted on a twin pumper testing with antifreeze. They were experiencing ghost flows. When they closed off the valves on each side of the meter (blocking in), the meter….
There are important lessons learned while troubleshooting equipment. Recently, a customer called about a new Coriolis meter (a small DN Promass 500) on a PROFIBUS network that was outputting negative values. Our customer had checked the install, and the meter was installed vertically. Identical to three other meters. According to the pump RPM, the meter….
