What causes fault code SAF-008 (Two-Hand Control Timing Violation)?

Operator pressed buttons with only one hand or not simultaneously. One button mechanically stuck — appears pressed but contact not made. Button contact block failed — electrical contact not closing. Timer relay malfunction — timing window too narrow. Wiring fault causing one channel delay

How do I fix fault code SAF-008?

Verify both buttons operate freely — no mechanical binding. Test each button contact block individually with meter. Check timer relay setting — typically 0.5 second window for two-hand activation. Verify wiring — no excessive resistance on either channel. Replace button contact blocks if contacts degraded. Retrain operator on proper two-hand control technique

Two-Hand Control Timing Violation

SAF-008

Two-hand safety control detected timing violation. Operator did not press both buttons within required time window.

medium general packaging palletizer

safety two-hand control timing operator

Probable Causes (ranked)

Operator pressed buttons with only one hand or not simultaneously
One button mechanically stuck — appears pressed but contact not made
Button contact block failed — electrical contact not closing
Timer relay malfunction — timing window too narrow
Wiring fault causing one channel delay

Fix Steps

1 Verify both buttons operate freely — no mechanical binding
2 Test each button contact block individually with meter
3 Check timer relay setting — typically 0.5 second window for two-hand activation
4 Verify wiring — no excessive resistance on either channel
5 Replace button contact blocks if contacts degraded
6 Retrain operator on proper two-hand control technique

Field Trick

Two-hand controls must be pressed within 0.5 seconds of each other. If the operator is having trouble, check the buttons — a sticky button adds just enough delay to violate timing.

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