Device SensorBinary

SensorBinary

This page is generated from the Unity twin. Published from _docs/context/devices/sensorbinary.md — edit it there, not here. Changes made in the wiki are overwritten on the next sync.

A presence sensor. Reports whether something is inside its beam — one bit, no commands.

Twin device type · twin FB FB_SensorBinary · 29 instances in FG_01, FG_05, FG_Transport · Unity component OC.Components.SensorBinary

What it is

A light barrier or proximity switch: the machine's eyes. It is how the control program knows a pallet has arrived at a station or has left it again.

What the PLC sees

Symbol	Meaning
Status.0	Something is detected

No control bits. The PLC cannot command a sensor, only read it.

How the twin models it

The sensor is a real volume in the 3D scene — a thin beam of a settable length, or a box fitted to the geometry — and it switches when a part physically enters it. Nothing tells the sensor a part is there; it sees one because one is there. That is what makes a mis-timed release or a part left behind show up in the twin the way it would on the machine.

Each instance can be inverted, for a sensor whose real-world contact is normally closed.

In this machine

There are 29 of them, in FG_01, FG_05, FG_Transport:

Device	Twin PLC path	Group	Role / Signal
B_SafetyGate1	MAIN.FG_01.B_SafetyGate1	FG_01	Monitors guard gate 1 for the FG_01 laser interlock.
B_SafetyGate2	MAIN.FG_01.B_SafetyGate2	FG_01	Monitors guard gate 2 for the FG_01 laser interlock.
B_Part	MAIN.FG_05.B_Part	FG_05	Binary presence sensor. On the FEED: a cap has arrived at the pick position. Once the gripper lifts one away it reports the NEXT one.
B_Detect	MAIN.FG_Transport.Index01_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Index01_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_Detect	MAIN.FG_Transport.Index02_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Index02_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_Detect	MAIN.FG_Transport.Index03_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Index03_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_Detect	MAIN.FG_Transport.Index04_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Index04_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_Detect	MAIN.FG_Transport.Index05_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Index05_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_AxisMax	MAIN.FG_Transport.Lift01_B_AxisMax	FG_Transport	Travel limit: while made, motion further up is blocked.
B_AxisMin	MAIN.FG_Transport.Lift01_B_AxisMin	FG_Transport	Travel limit: while made, motion further down is blocked. Referencing sets the axis position here to 0 mm.
B_Detect	MAIN.FG_Transport.Lift01_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Lift01_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_AxisMax	MAIN.FG_Transport.Lift02_B_AxisMax	FG_Transport	Travel limit: while made, motion further up is blocked.
B_AxisMin	MAIN.FG_Transport.Lift02_B_AxisMin	FG_Transport	Travel limit: while made, motion further down is blocked. Referencing sets the axis position here to 0 mm.
B_Detect	MAIN.FG_Transport.Lift02_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Lift02_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_Detect	MAIN.FG_Transport.Stopper01_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Stopper01_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_Detect	MAIN.FG_Transport.Stopper02_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Stopper02_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_Detect	MAIN.FG_Transport.Stopper03_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Stopper03_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.
B_Detect	MAIN.FG_Transport.Stopper04_B_Detect	FG_Transport	Binary presence sensor. Active while a pallet is at this station. Occupied and CanAccept are computed from it.
B_Exit	MAIN.FG_Transport.Stopper04_B_Exit	FG_Transport	Binary presence sensor. Its RISING EDGE clears the transfer latch, in every PackML state. Read the edge, never the level.

Control implementations

The twin is master for structure, and that is all this page states. Which control function block each instance becomes, its process-image members and its published HMI struct is the control platform's own knowledge base:

• Beckhoff
• Siemens — no knowledge base published yet