GEM State Machine

Understanding GEM communication, control, and processing states.

GEM State Models

The GEM (Generic Equipment Model) standard defines several state machines for equipment behavior.

Communication State Model

                    ┌─────────────────┐
                    │   DISABLED      │
                    └────────┬────────┘
                             │ Enable
                    ┌────────▼────────┐
                    │ NOT COMMUNICATING│
                    └────────┬────────┘
                             │ S1F13/S1F14
                    ┌────────▼────────┐
                    │  COMMUNICATING  │
                    └─────────────────┘

Control State Model

        ┌──────────────────────────────────────┐
        │         EQUIPMENT OFFLINE            │
        └──────────────────┬───────────────────┘
                           │
        ┌──────────────────▼───────────────────┐
        │          ATTEMPT ONLINE              │
        └──────────────────┬───────────────────┘
                           │
        ┌──────────────────▼───────────────────┐
        │           HOST OFFLINE               │
        └──────────────────┬───────────────────┘
                           │
        ┌──────────────────▼───────────────────┐
        │              ONLINE                  │
        │  ┌─────────┐     ┌─────────┐        │
        │  │  LOCAL  │ ◄─► │  REMOTE │        │
        │  └─────────┘     └─────────┘        │
        └──────────────────────────────────────┘

Processing State Model

**INIT:** Equipment initializing

**IDLE:** Ready to process

**SETUP:** Being configured

**READY:** Ready to start

**EXECUTING:** Processing material

**PAUSE:** Temporarily stopped

State Transitions in FabConnect

FabConnect automatically tracks and reports state changes via:

Real-time dashboard updates

WebSocket events

S6F11 Collection Events