p251 cannot be reset

Hi,

how to set p251 = 0 after fan replacement?

Access level set is 3, connect for target is online.

Entering 0 and acknowledging displays an error and returns the original value.

What about it?

Hi,

do you use S120?

Have you tried it like described here in the FAQ?:

https://support.industry.siemens.com/cs/de/en/view/109480518

It is stated that you should change the fan and then set p251 and p254 to 0 - then the warning should be gone.

Mark3

Hi,

how to set p251 = 0 after fan replacement?

Access level set is 3, connect for target is online.

Entering 0 and acknowledging displays an error and returns the original value.

What about it?

 It should be change in Ready mode drive should not be running for changing.

Hi,

according to the procedure it is not possible.

After confirming the changed value of p251 = 0, it displays an error:

Case: parameter p0251 [0000]: write acess not permitted

(reason: the do involved has pulse enable)

Unable to change parameter value

Hi,

you need to switch off the drive before changing p251.

Check r2=ready to switch ON (ready status) and change.

Thank you all for your advice.

Parameter r2 did not contain "Ready to switch on".

On the machine after turning off the servo switch, r2 changed to "Ready ..."

Then it was possible to write 0 in parameter p251.

On the machine, the signal with the servo switch goes to p840 and p852 only for completeness.

Well thank you