Emerson FM-3 Anleitung zur Fehlerbehebung PDF herunterladen (Seite 24)

“E” Encoder Line Fault

This fault is indicated by the display showing a “E”. Indicates a fault involving the

Encoder feedback.

Potential causes for the “E” Encoder Line Fault

• Loss of Encoder feedback

• Excessive noise induced into Encoder cable

• Drive and motor operating at different ground potentials

• Improper feedback wiring or potential cable issues

• Flexing of a non-flex cable

• Use of non-Emerson CT serial cables

“E” “Encoder Line Fault”

Remove

FM Module

(if so equipped)

Reapply Power

Loss of

Encoder Feedback

Use PowerTools

Select Analog Mode,

Configure Drive and Motor,

Download to Drive

Yes

Return to

Normal Operation

Recycle Power

Run Programs

Return to

Normal Operation

Motor and Drive

Operating at different

Gorund Potentials

En Fuse

Open

Replace Motor

and Return

to Factory

Yes

Replace Drive

and Return

to Factory

Yes

"E"

Encoder Line

Fault

End

Replace Drive

and Return

to Factory

Return to

Normal Operation

Yes

End

Check +5 VDC

J7 pin 7 to pin 17 (Gnd) EN

J6 pin 7 to pin 17 (Gnd) Epsilon

Should be 4.9 to 5.15vdc

* Refer to Appendix E

for Connector Locations

Yes

Select "Status" Tab or

"Watch Window" to

View "Position Feedback Encoder"

DO NOT Enable Drive

Rotate Motor Shaft by Hand

Counts are Displayed?

Increases with CW Rotation

Decreases with CCW Rotation

Noise

Induced in Feedback

Cable

Use of non-Emerson CT

Serial Cable

Check +5 VDC

J7 pin 7 to pin 17 (Gnd) EN

J6 pin 7 to pin 17 (Gnd) Epsilon

Should be 4.9 to 5.15vdc

Replace with CT Approved Cable

If Resistance Measured

Contact Factory

Tech Support

Check Continuity Motor Case

to Motor Feedback Connector Shells

Epsilon or J8

Must be Zero!

Resettable

Fuse Open

Allow to cool

Reset is

Automatic

EN & Epsilon

shipped after

October 2001

Check Routing

& Condition of

Feedback Cable

in Runs

Relay Coils W/O

Diodes in System

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 59 60

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