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Operate In Browser HMI

Open /hmi to inspect or operate a running project.

What Your URL Usually Looks Like

  • http://<host>:<port>/hmi
  • or a site-specific hostname your administrator or supervisor gave you

If the page is unreachable:

  1. confirm you have the right URL
  2. record the time and any error text
  3. use your local runbook or escalation contact

Quick start

  1. Open /hmi.
  2. Read the overview page first.
  3. Open the process page.
  4. Check trends if values look suspicious.
  5. Open alarms before trying operator actions.

Browser HMI

Figure: Start here: the HMI shows runtime connection state, freshness, alarms, and live process values. Open the Trends and Alarms pages from the left sidebar.

What Acknowledge means

  • Acknowledge clears the banner state for the operator workflow.
  • It does not guarantee that the physical cause is gone.
  • If the alarm returns, follow your site procedure and escalation path.

Operator restrictions

  • Force outputs only after procedure approval and field confirmation.
  • Treat acknowledge as an operator workflow step; if the condition remains or returns, follow the site escalation path.
  • Keep project edits in an authorized engineering session; operator sessions are for monitoring and approved actions.

Local Runbook

truST gives you the generic operator UI. Your plant still needs a site-specific runbook with:

  • the HMI URL
  • allowed usernames or access path
  • escalation contact
  • alarm actions
  • start-of-shift checks

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