Hallo, 

the standard reaction of alarm 521 of TO is release axis (no enable), the question is possibile modify this standard reaction to Stop with maximum dinamics?

Thanks

Hello,

it is not possible to change the alarm reaction.

It would be possible to override Bit 1 (Off2  ;  Bit1 := True;) of the control word in MC_PostServo, to avoid a cost stop

or you can monitor for your own, and do a stop when position deviation becomes too big.

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https://support.industry.siemens.com/cs/ww/en/view/109770665

Hallo,

i try to do overwrite, but this function: "MC_SetAxisSTW" don't allow me to overwrite bit 1.

The following bits can be controlled in STW1:

• 8

• 9

• 11 to 15

i monitor follwing error myself:

#Error := ABS("PositioningAxis_1".StatusPositioning.FollowingError) > 0.5;

i have to write direct to periphery into control word 1, output adress: PositioningAxis_1_Actor_Interface_AddressOut.STW1?

is necessary do it in MC-PostServo (OB95) ?

important note about behavior, i try simulate following error of tecnology object and  the motor stop quickly but read manual, MC_alarm 521 the reaction is remove enable.,

the question is remove enable have effect stop motor? or relese motor rotation?

thank you

Hello,

 use MC_Stop for Alarm reaction.

When manipulating PositioningAxis_1_Actor_Interface_AddressOut.STW1

it is  necessary do it in MC-PostServo (OB95).