unwinder torque control

Hello All,

on my aplication

1-from siemen plc with aif setpoint send lenze drive with torque control value:-10%
2-send speed limitation -5%

when machine running i see actual torqoue -27% !!'
I think must see -10%

what is my mistake?



and idea?

Best regards

Crb

What siemens plc? S7300?
What raw pqw value are you sending?

dear JRw

i use siemen plc s7-300

A(
A(
A(
L "Boşaltma_Db".tork_set
L 1.000000e+002
/R
T #tork1
AN OV
SAVE
CLR
A BR
)
JNB _00c
L #tork1
L 1.638500e+004
*R
T #tork2
AN OV
SAVE
CLR
_00c: A BR
)
JNB _00d
L #tork2
RND
T #tork3
AN OV
SAVE
CLR
_00d: A BR
)
JNB _00e
L #tork3
L L#-1
*D
T #tork4
_00e: NOP 0
like thah i send torque refereanse to drive.

many thanks for your advice

Any idea?

Are you sure that your feedback from the drive is torque and not current?

Current is not proportional to torque for a vector drive as it will include magnetising current for the motor regardless of torque demand/limit.

Nick

for analog on a s7300 I think you want 27648.0 in your code- not 16385
Here's your code running