Hi,

I'm trying to validate an emergency stop using MC_POWER on a SPEEDAXIS.

For some reasons, using my CPU (1512SP) and my G120C, when MC_POWER with enable=False is called, with StopMode 0, the drive starts a normal decceleration ramp, and then 250ms later, a quickStop, with the emergency stop ramp.

The issue seems to be on the TO side, because the coastStop of STW1 falls after 250ms.

I'm quite puzzled on how to solve this, and watching the status word of the drive doesn't give me any advice at all on what is going on.

Some help is welcome :)

Kind regards,

dFx

EDIT : Fix typo

Hello,

Reduce the "VelocityThreshold" or increase the "MinDwellTime".

12.9.16 PositionMonitoring tags as of V6 .......................................................................................... 313

https://support.industry.siemens.com/cs/de/en/view/109773400

Hi,

thanks for your answer, but there is no PositionMonitoring in my TO_Axis (TO_SpeedAxis, so feels normal).

Furthermore, the documentation pointed out is from S7-1200, while I'm on a s7-1500SP CPU.

While the axis correctly brakes after the 250ms delay, I need it to brake earlier.

Regards,

dFx

Hello,

Info about:

3.11.2 Emergency stop deceleration (S7-1500, S7-1500T)

https://support.industry.siemens.com/cs/de/en/view/109781849 

G120C use "Ramp function generator".

Reduce the time, to get a faster ramp down.

8.18.6 Ramp-function generator

https://support.industry.siemens.com/cs/de/en/view/109782995