10
Eliminating faults
Fault
Possible cause
Remedy
Green LED does not light up
Power supply incorrectly connected
Connect SMH-AE1-... correctly
No power supply
Check power supply
Switching point cannot be set
Incorrect Hall sensor used
Use only gripper-specific Festo Hall sensors of type
SMH-S1-... (e.g. Hall sensor SMH-S1-HGP06 must
be used with gripper HGP-06-A)
Gripper is actuated without compressed air
Use grippers actuated by compressed air (piston and
gripper finger not always mechanically coupled)
Hall sensor fitted onto wrong exterior side (only
in the case of externally fitted Hall sensors)
Observe fitting side as per instructions supplied with
SMH-S1-...
Steel parts in immediate vicinity of Hall sensor
Remove steel parts and, if necessary, replace by
non-iron metals
Hall sensor not flush with exterior of gripper (only
in the case of externally fitted Hall sensors)
Place Hall sensor in the centre bores of the gripper
Output signal = 0 V
Short circuit on the switching outputs
Eliminate short circuit
Irregular interference
Functional earth/ground not connected
Connect functional earth/ground
No voltage at output
Incorrect operating voltage
Observe operating voltage range
SMH-AE-... does not function
SMH-AE1-... or Hall sensor is defective
Replace Hall sensor
Return SMH-AE1-... and Hall sensor to Festo
Fig. 23
0503a
D/GB 21
