MITSUBISHI FX5U FEEDBACK MOTOR EXAMPLE
Editorial reference version: 1.0 (2026-08-31)
Target intent: MELSEC iQ-F FX5U project in GX Works3
Status: reviewed teaching listing; enter, convert and test in the exact target project

IMPORTANT BOUNDARIES
- This is ordinary machine-control training logic. It is not a safety program.
- X/Y assignments are examples. Verify the selected CPU, module configuration,
  wiring drawing and octal device notation before assigning hardware.
- The Boolean instruction form below expresses Networks 1, 2, 4 and 5. Build
  the feedback timer/fault networks with an on-delay timer instance supported
  by the exact FX5 CPU and GX Works3 release; use a three-second engineering
  preset and verify its units in the instruction help.
- GX Works3 does not support list display/edit for FX5 circuit blocks. The list
  is a portable review representation, not an importable FX5 list-program file.

EXAMPLE DEVICE MAP
X0  PB_Start                 momentary; 1 when pressed
X1  StopCircuitHealthy       NC-wired field loop; 1 when healthy
X2  ProcessPermissive        1 when ordinary process conditions permit run
X3  MotorRunFeedback         1 when contactor/drive feedback is proved
X4  PB_Reset                 momentary; 1 when pressed
Y0  MotorRunCommand          ordinary control command to mapped output layer
Y4  MotorRunLamp             indication follows final command in this example
M0  RunRequest               retained only by the program seal-in path
M1  StartPrevious            previous-scan Start state
M2  StartPulse               one evaluated scan on a rising Start
M10 StartFail                latched ordinary-control diagnostic

NETWORK 1 — RISING START EDGE (BUILD IN LAD/FBD)
StartPulse := PB_Start AND NOT StartPrevious
StartPrevious := PB_Start

NETWORK 2 — START-FEEDBACK SUPERVISION (BUILD IN LAD/FBD)
StartFeedbackTimer(
  IN := Y0 AND NOT X3,
  PT := T#3s
)

NETWORK 2B — LATCH FIRST START FAILURE
LD   StartFeedbackTimer.Q
SET  M10

NETWORK 3 — RESET ONLY AFTER START, COMMAND AND FEEDBACK ARE OFF
LD   X4
ANI  X0
ANI  Y0
ANI  X3
RST  M10

NETWORK 4 — STOP-DOMINANT REQUEST SEAL-IN
LD   M2
OR   M0
AND  X1
AND  X2
ANI  M10
ANI  X4
OUT  M0

NETWORK 5 — SINGLE FINAL COMMAND OWNER
LD   M0
AND  X1
AND  X2
ANI  M10
OUT  Y0

NETWORK 6 — RUN INDICATION
LD   Y0
OUT  Y4

NETWORK 7 — OPTIONAL RUNNING-FEEDBACK POLICY
If the requirements say feedback loss while running is a trip, add a separately
named and tested dropout timer. Do not silently reuse the start timer or assume
that every machine must trip on the same delay.

EXPECTED PRIORITY
1. Missing feedback for the verified three-second preset sets M10 before the
   request and final-command networks evaluate.
2. Reset is rejected until Start, command and feedback are all false.
3. A fresh Start edge may create/hold M0 only while all conditions are true.
4. Unhealthy stop circuit, lost permissive or latched StartFail removes Y0.

HANDOFF EVIDENCE
- exact CPU catalog number and firmware
- GX Works3 version/update and project series/CPU selection
- approved I/O drawing and device-comment export
- clean conversion result and reviewed warnings
- simulator limitations and test record
- field I/O proof, force/device-test clearance and final project checksum

Primary documentation index:
https://www.mitsubishielectric.com/fa/download/search.page?kisyu=%2Fplcf&mode=manual