Symptom and Scope
On a cMT2108X2 V2 configured with EasyBuilder Pro 6.10.01.259, an Event Display used for alarm history may contain more entries than fit on screen. The additional entries still require scrolling; their absence from the visible area does not establish that the HMI failed to record them.
| Item | Evidence |
|---|---|
| HMI | cMT2108X2 V2 |
| Software | EasyBuilder Pro 6.10.01.259 |
| Object | Event Display used as alarm history |
| Reported issue | Entries beyond the visible area are not immediately displayed |
Why the Scroll Bar Is Not Visible
On cMT(X)-series HMIs, the Event Display scroll bar is hidden while it is not in use. A missing scroll bar is therefore expected behavior and does not, by itself, indicate an object configuration fault.
Scroll the Event Display
- Press or click inside the Event Display object.
- Drag within the object upward or downward to move through the alarm-history entries.
Use the gesture directly inside the Event Display instead of relying on a separate slider assigned to the Scroll address. The available evidence reports that the slider approach did not work reliably, but it does not identify a specific address, scaling rule, or configuration correction.
Verify the Result
Populate enough alarm-history entries to exceed the visible object area, then click and drag inside the Event Display. Confirm that entries outside the initial view become visible. If the content does not move, the evidence does not establish whether the cause is object configuration, input handling, or another project setting; review those items without assuming that the hidden scroll bar is a fault.
FAQ
Why is the cMT Event Display scroll bar missing?
The scroll bar on cMT(X)-series HMIs is hidden when not in use. Scroll by clicking and dragging within the Event Display.
How do I scroll alarm history on a cMT2108X2 V2?
Press or click inside the Event Display and drag upward or downward. Test with enough history entries to exceed the visible area.
Should I use a slider with the Event Display Scroll address?
The reported slider approach did not work reliably. Use direct click-and-drag scrolling; the evidence provides no supported address or slider configuration correction.