Need Help!- TNC370 Spindle Drive Fault

[wahidbashir]

Hello Memebers,
I have TNC370 with simudrive 611 analog with 6SN1123-1AA00-0DA0
When i execute the commands M3 S100 or any required rpm and then cycle start, Spindle moves back and forth means motor moves forward and then reverse and continues this.
No problem is being displayed. Feed back encoder is working and i have checked its analog voltage are ok on its drive terminal.
When i plugout its anlog input signal and then cycle start then it also moves
Your kind attention in this regard may help me.
what procedure i should carry.
thnaks in advance

[Jukka Honkanen]

Check first your Siemens.
Release the drive with 24Volts on X431 663 and 65
663 = Axis specific pulse enable and 69 = Controller enable.
Put in a voltage to analog input of the drive 0-9V.
X421 56/14
Now your spindle should be running according the input on 56 and 14.
If it is not, then the drive is gone.
If it is running and you can control the speed with voltage input,
then there is something else wrong.
I guess that the drive is bad.

Jukka