G120C maximum performance with Startdrive

Hello,

Can anyone explain a bit. I have standard configuration G120C with external braking resistor, and mechanical brake that coil connected directly to motors wiring (do not have separate control from inverter) all system controlled by PN. Motor, inverter and braking resistor do not warms at all. Motor 1400rpm, object driven via gear. If I try to run faster, 1800rpm from HMI, value enters, but inverter run only in its maximum 1400rpm. If I put directly in Startdrive 1800rpm, again motor runs only 1400 rpm. Also I need much faster startup and stop ramp, but if I put 0,1s ramp it starts and stops in 2 sec. It seems that G120C has internal values those are limiting. Start/stop cycle I need every 1s with 15s of cooldown. Motor should run at maximum for 1s and be stopped for 15s.

What parameters to change in Startdrive (G120C), that motor speed can be increased to 2500rpm.

What parameters to change that start/stop ramp be fastest as possible. I would like that motor, inverter and braking resistor heat up to the maximum. That motor and inverter heat be limited only with thermal guard at maximum values :)

What else can be done to stop motor as fast as possible? Add bigger resistor, bigger inverter?

Do not think that I will run drive till it be hot in red, just if I will understand what values can be changed, I can visually inspect drive and choose maximum values with proper heat and not maximum to its specification.

By the way, some parameters of inverter I do not see in Startdrive even have full access choosen. What I do wrong?

Max speed, see p1082

Ramps p1120, p1121 and p1135

And deactivate Vdc Controller if you have an braking resistor.

Check p219 too.

Further Check p640, p1520, p1521, p1530, p1531 for Current, torque and Power Limit.

Hi zako_,

And deactivate Vdc Controller if you have an braking resistor. - You mean enter p1280  value 0 for U/f?

Technikas

Hi zako_,

And deactivate Vdc Controller if you have an braking resistor. - You mean enter p1280  value 0 for U/f?

 When P0219 is set >0, then the Vdc-max controller will be switched off automatically!