S7 200/pwm wizard

i am working on speed control of SRM using s7 200 plc.for that i have problem in configuring PWMx_run wizard.can u help me out

hemanth said:

can u help me out

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Maybe. But we need more detailed info about your problem. I for one haven't a clue what your problem is, apart from being a problem with PWM.

Regards,

jvdcande said:

Maybe. But we need more detailed info about your problem. I for one haven't a clue what your problem is, apart from being a problem with PWM.

Regards,

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i am working on speed control of 4 phase (8/6)switched reluctance motor.for this i am using split dc converter.it having four MOSFETs for 4 phases of stator.at a time only one or two phases will be active. But S7200 having only two pwm generators.how to use them for 4 phases.

And while configuring pwm wizard i dont know what is RUN & error.
from my motor i have position feedback signals from two HALL sensors placed 15 degrees apart.i have to sense those signals, i have to generate PWM signals.

if i get pwm from plc how time share that pwm output for phases

Pwm sharing

if i get pwm from plc how time share that pwm output for 4 phases.
that is i have to use the same PWM output for switching four devices.how it could be done?
do we need to design any external logic or can we write logic within the PLC

I think you'll need extra electronics. Maybe some of the drive specialists here can help you further.

Kind regards,