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Machine control definition and UI

Part of the Controls and electronics section. Local stand-alone controls, indicators, safety UI, and lockout/tagout.

Introduction

The machine must be operable as a stand-alone unit with local ON/OFF and run/stop controls. The UI should be easy-access at the top-front of the machine, with clear indicators for RUNNING/STOPPED and safety-open state. A rear lockout/tagout (LOTO) unit is required for service and seasonal teardown.

Colour key & components

UI components and intent.

Colour(s)	Component
—	Top-front control unit — ON/START, OFF/STOP, E-STOP, RUNNING and STOPPED indicators.
—	Safety status indicator — "machine open" indicator when any lid interlock is open.
—	Rear LOTO unit — lockout/tagout isolation point accessible from the top-rear.

Figures

Control panel concept and placement (photo/CAD snapshot).

Figure 1. Top-front control unit concept (photo).

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Recommended figures (contractor clarity)

Add figure: Panel face layout — exact button/indicator positions and labeling.
Add figure: Rear LOTO access — operator reach path with covers open/closed.
Add figure: Wiring home-run — from panel to motor contactor and lid switches (block diagram).

Discussion

Rough design & intent

Stand-alone operation — local power and run controls allow independent operation, inspection, component replacement, and simple cleaning.
Clear state indication — operator should quickly see whether the machine is running, stopped, or prevented from running due to safety-open conditions.

Control panel requirements (top-front)

ON / START button
OFF / STOP button
Emergency stop button
RUNNING indicator
STOPPED indicator
MACHINE OPEN / safety-open indicator (lid interlock state: any feeder/plunger/drivetrain cover lid open)

LOTO requirements (top-rear)

Easy access — isolate power quickly for service.
Lockable — designed for lockout/tagout process (plant procedures may vary).

Known issues & risks

Washdown exposure — UI and wiring must be water protected; choose enclosures, seals, and glands appropriate for industrial cleaning.
Safety logic clarity — avoid ambiguous states; make it obvious why the machine will not start (open lid, E-stop, etc.).

Questions for contractor

Recommend industrial components and enclosure/IP rating appropriate for washdown exposure.
Propose panel layout that is ergonomic (top-front) and maintainable, with clear labeling and indicator logic.
Propose LOTO architecture and location that meets plant practice while remaining simple for operators.
Recommend coded safety lid hardware (magnet code anti-misuse) and wiring/integration approach using the same control boards as the commercial machine.

Interfaces

Input: operator button presses; safety interlock states.
Output: run/stop command to motor controls; visible indicators for state.
Mount: top-front panel; wiring routes to internal control cabinet.

Interfaces and tolerances

Tolerances TBD; contractor to propose mounting and sealing details consistent with washdown environment.

Part	Interface / tolerance	Related
Top-front UI	Washdown-resistant enclosure and gland sealing; labeling/ergonomics	Controls and electronics
Rear LOTO	Lockable isolation point; access envelope	—

Components

ON/START, OFF/STOP, E-STOP pushbuttons
RUNNING/STOPPED indicators
Safety-open indicator
Rear lockout/tagout device
Enclosure, wiring, glands, labels

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