What causes fault code CR30-RESET-REQ (440C-CR30 Manual Reset Required)?

E-stop was pressed and released â€” machine is now in reset-required state (normal and expected behavior). Guard door was opened and re-closed â€” machine requires reset per safety design. Light curtain was interrupted and is now clear â€” reset required before motion can resume. Power was cycled â€” CR30 always requires manual reset after power-up when configured for manual reset. Reset button wiring fault â€” CR30 is not seeing the reset signal when button is pressed

How do I fix fault code CR30-RESET-REQ?

Walk the machine and verify all E-stops are released (twist-and-pull to release), all guard doors are closed, all light curtains are clear. Locate the machine's safety reset button (typically green pushbutton on the control panel or at a remote station). Press and hold the reset button for 1â€“2 seconds â€” CR30 requires a minimum pulse width to accept the reset signal. Verify the CR30 OUTPUT LED changes from amber/off to green after reset â€” indicates outputs energized. If reset button press does not clear the condition, check wiring from reset button back to CR30 reset input terminal. Verify reset button NC/NO contact type matches CR30 configuration in CCW. If CR30 still does not reset, check that all safety inputs are truly in their de-actuated state â€” CR30 will not reset with any input in fault

440C-CR30 Manual Reset Required

CR30-RESET-REQ

The CR30 is configured for manual reset. After a safety input was activated (E-stop, guard door, light curtain), all inputs have returned to the safe/reset-ready state but the system requires a deliberate manual reset before safety outputs will re-energize.

medium cr30 allen-bradley conveyor packaging palletizer piler

allen-bradley cr30 440c reset e-stop guard door safety

Probable Causes (ranked)

E-stop was pressed and released â€” machine is now in reset-required state (normal and expected behavior)
Guard door was opened and re-closed â€” machine requires reset per safety design
Light curtain was interrupted and is now clear â€” reset required before motion can resume
Power was cycled â€” CR30 always requires manual reset after power-up when configured for manual reset
Reset button wiring fault â€” CR30 is not seeing the reset signal when button is pressed

Fix Steps

1 Walk the machine and verify all E-stops are released (twist-and-pull to release), all guard doors are closed, all light curtains are clear
2 Locate the machine's safety reset button (typically green pushbutton on the control panel or at a remote station)
3 Press and hold the reset button for 1â€“2 seconds â€” CR30 requires a minimum pulse width to accept the reset signal
4 Verify the CR30 OUTPUT LED changes from amber/off to green after reset â€” indicates outputs energized
5 If reset button press does not clear the condition, check wiring from reset button back to CR30 reset input terminal
6 Verify reset button NC/NO contact type matches CR30 configuration in CCW
7 If CR30 still does not reset, check that all safety inputs are truly in their de-actuated state â€” CR30 will not reset with any input in fault

Field Trick

Operators often push the reset button too quickly. The CR30 requires a 0.25â€“2 second pulse to register a valid reset. Hold the button for a full 2 seconds to ensure the CR30 accepts it. A momentary tap is often ignored by the relay.

Suggested Replacement Parts

Parts matched to fault category: Safety Relay

Allen-Bradley Guardmaster 440R-N23126 P/N: 440R-N23126 Dual-channel safety relay, 24VDC, 3 N.O. + 1 N.C., Cat 4 / PLe

AutomationDirect $125.00 Amazon $95.00 Grainger $155.00

Pilz PNOZ X3 Safety Relay P/N: 774310 24VDC/AC, 3 N.O. + 1 N.C., E-stop and safety gate monitoring

AutomationDirect $145.00 Amazon $135.00 McMaster-Carr $165.00

Prices are estimates. Verify part numbers match your equipment before ordering.

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