Commissioning and troubleshooting

On site, under pressure, with the plant waiting. What went wrong and what fixed it.

Answered
The sequence hangs on one step and nobody can say why
Because the step has no timeout, so there is nothing to report. A step that waits for a transition condition and never gets it will wait forever, and the only symptom is that the …
LADX · 2d ago · last activity 2d ago
2replies
Answered
Analog input reads full scale: where do you start?
Work from the field back, and check the cheap things first. Full scale on a 4 to 20 mA input almost always means the loop is open or the input is seeing more current than it shoul…
LADX · 2d ago · last activity 2d ago
1reply