I have also doubt that whenever the rollers operation comes in the picture, it is making Profibus communication unstable due to noise. And, the telegram signals drops down.

I am in process to find out the telegram exchange in-between the Simotion devices. Meanwhile can somebody share their views to resolve this problem?

Thanks in advance.

I think that the problem is in this statement :

Referring to the solutions given in the Siemens forum we come to the conclusion that the Infeed operation is withdrawal due to the signal OFF1 or OFF2 or OFF3 turns off during the machine cycle.

Unless your machine's specific rules requires to disable the power supply when you cut the OFF1,2,3, there is no need to "kill" the power supply when your safety circuit is triggered.

It can stay up until the machine is switched down, since the safety of the motors is amended to S120 drives which are able to cut the power (to motors) when OFF1,2,3 are falling.

Solution : if it's allowed by laws/rules/etc, put a splendid " 1 " signal into the Power Supply and don't use the OFF signals to enable/disable it.

Davinator

I think that the problem is in this statement :

Referring to the solutions given in the Siemens forum we come to the conclusion that the Infeed operation is withdrawal due to the signal OFF1 or OFF2 or OFF3 turns off during the machine cycle.

Unless your machine's specific rules requires to disable the power supply when you cut the OFF1,2,3, there is no need to "kill" the power supply when your safety circuit is triggered.

It can stay up until the machine is switched down, since the safety of the motors is amended to S120 drives which are able to cut the power (to motors) when OFF1,2,3 are falling.

Solution : if it's allowed by laws/rules/etc, put a splendid " 1 " signal into the Power Supply and don't use the OFF signals to enable/disable it.

 Thank you very much for the quick reply.

Yes, I can do this. But the OFF1,2,3 are assigned automatically during the configuration. I am just finding out how to disable automatic assigned telegrams. I am also finding the impact of this change on other parameters as machine is in production. Can you please help me? 

Well, when you configure from the beginning the supply, at a certain point it asks for a signal that enables it. That signal can come from telegram OR can be set at 1.

I do not remember how to go back and change it from expert list (maybe you can try to find it and change it in expert list).

Also please check the EP (Enable Pulses) of that line supply, since this is the hardwired signal that enables or disables the supply. I suggest to connect it to main switch of the machine or, otherwise, to put a direct +24VDC on it.

This unless your machinery specific rules and laws says differently

Davinator

Well, when you configure from the beginning the supply, at a certain point it asks for a signal that enables it. That signal can come from telegram OR can be set at 1.

I do not remember how to go back and change it from expert list (maybe you can try to find it and change it in expert list).

Also please check the EP (Enable Pulses) of that line supply, since this is the hardwired signal that enables or disables the supply. I suggest to connect it to main switch of the machine or, otherwise, to put a direct +24VDC on it.

This unless your machinery specific rules and laws says differently

 Thank you very much for the help.

I will try it on the machine. It is in production so need some time.

Thank you again