Connected
Plant

Plant Box and lease

The Plant Box keeps working offline under a signed lease: recommend-only after 4 hours offline, never past 8. Anyone on site with the right role can revoke it.

Lease

Lease issued 20/10 08:00
Connected
State
Connected
signed lease Lease issued 20/10 08:00
Offline limit
4 h
then recommend-only
Hard cap
8 h
then stops acting
0 h4 h recommend-only8 h
Issued
20 Oct 08:00
Last sync
1 min ago
Box
Plant Box · box 1.9.2

Revoke the Plant Box lease?

The Plant Box stops writing at once and becomes recommend-only. Running settings stay where they are. A new lease must be signed before the box writes again.

Illustrative: nothing is revoked in this demonstration.

What the box does at each stage

Stages
StageBehaviourMode
ConnectedProposes and, where a standing approval allows, writes inside signed windowsNormal
Offline under 4 hKeeps running settings inside their windows; no new writes outside themWatch
Offline 4 to 8 hRecommend-only: shows proposals, writes nothingRecommend-only
Past 8 h or revokedStops acting; the plant runs on its own settingsStopped

Lease history

Leases
LeaseIssuedStateOfflineRevoked by
Lease issued 20/10 08:0020 Oct 08:00active0 min
Lease issued 19/10 08:0019 Oct 08:00expired37 min
Lease issued 11/10 14:0011 Oct 14:00revoked0 minShift lead A.

Stops on site

Every stop restores the prior settings
Stops
LineByEffectRestoreAt
Line AOperator C.Restored 84 °C for batch 2409; trial resumed next batch after reviewrestored18 Oct 10:00
Line BShift lead A.Kept 720 bar, no new writes for 2 hnot needed11 Oct 14:00

What syncs through the box

Sources
SourceTagsLast seenGap
Plant historian461 min ago0.4%
Production system124 min ago0%
Lab system62 h ago3.1%
Quality system41 h ago0%

Who can revoke

Shift lead and plant head, on site. Revoking needs no network and takes effect at once. Your role: can revoke.