Emerson FM-3 Guide de dépannage télécharger pdf (Page 26)

“S” RMS Shunt Power Fault

This fault is indicated by the display showing a “S”. This indicates a fault involving the

drives internal shunt circuitry. The shunt power parameter is an internally calculated

parameter.

Potential causes for the “S” High DC Bus fault

• Internal shunt power calculation has exceeded capability of internal shunt circuitry

• High Inertial load

• High AC line

• Short rapid moves coupled with very short deceleration ramps

“S” “RMS Shunt Power Fault”

Reset with

Reset P/B

Return

Normal Operation

High Interial

Load

Reduce

Load

Check for

Increase in

Acutal Load

High AC

Input line

Reset

with Reset P/B

Short Rapid

Moves coupled

with Very Rapid

Deceleration Ramps

> 264 VAC

Investigate Cause

for Increase

Yes

Monitor

AC Input

>264 VAC 47-63 Hz

Yes

"S"

RMS Shunt Power

Fault

Determine

which Motions

cause fault and

alter as needed

Returns

Normal Operation

Return

to Factory

End

Internal Shunt Power

Calculation exceeds

capacity of

intenal shunt circuitry

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Emerson FM-3 Guide de dépannage Page 26

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