Held-state machine logic must be defined in the circuit and reset sequence before a limit switch is selected. Record the required state, reset path, operator access, mounting and verification conditions in the inquiry.
Important: actuator shape or a generic switch description does not prove a model latches, supports a specific circuit, rating, approval or life. Source note: use selected-model documentation and IEC 60947-5-1 scope before release.
– FAQ
Part 1. What is held-state logic?
It describes a required machine state that remains defined until the documented reset condition occurs. The schematic and operating sequence, rather than a product name, define the intended behavior.
Start at the LEMA Limit Switch product line once the control sequence is written.
Part 2. Which state and reset inputs should be documented?
State the triggering event, required held condition, reset method, reset location, operator instructions and access restrictions. Include a sequence diagram or control drawing with the request.
| Input | Document | RFQ |
|---|---|---|
| State | Trigger and required held condition | Yes |
| Reset | Method, location and operator access | Yes |
| Interface | Circuit and mounting context | Yes |
Part 3. How should circuit behavior be recorded?
Provide the drawing, state transition, required response, wiring method and interface to the machine controls. Keep the logic description with the physical installation information.
Use the circuit-form context for related contact-selection inputs.
Part 4. Which mounting and service details matter?
Review actuator path, adjustment, cable clearance, reset access, inspection and replacement process. The operator and technician must be able to follow the documented reset procedure on the installed machine.
Part 5. Why does a general guide not prove model behavior?
A general logic article cannot establish a device’s contact form, latching behavior, duty, approval, protection or life. Those requirements remain subject to selected-model documentation and the final circuit review.
Part 6. What should be validated before release?
Validate the representative machine for trigger event, held state, reset sequence, circuit response, access and service procedure. Preserve the accepted configuration with the release documentation.
Fit Boundary: this guide structures logic inputs; it does not certify a model or machine control function.
Part 7. How can LEMA support an inquiry?
Use the Limit Switch product route after defining the circuit and reset sequence.
Send a held-state RFQ with state, reset, circuit, mounting and sample inputs.
## FAQ
What is held-state logic?
It is a documented machine state that remains defined until its stated reset condition occurs.
Which reset inputs belong in an RFQ?
Include method, location, operator access, instructions and the related sequence drawing.
Does an actuator shape define the circuit?
No. The schematic and selected-model documentation define intended behavior.
How should the reset path be documented?
Record the triggering event, held condition, reset method and the installed operator access.
Can a general guide confirm a latching model?
No. Confirm actual device behavior from selected-model documentation.
What should be validated before release?
Validate trigger, held state, reset sequence, circuit response and service access.
## References