15 Hp Softstart W/brakes ?

We are building a Custom machine for a customer that has requested Softstarting as well as Dynamic braking. These are simple 15HP Induction motors that will be 460VAC..


I have a considerable amount of experiance with VFD's and No experiance with Softstarts ! Does the Softstart also include a DC Brake ? Or would the braking need to be seperate ??

My question then is, Why not just use a VFD and ramp the starting, As well as Decell the Stopping. Granted this app will require the use of braking resistors. The Speed control may come in handy but is not required.Cabinet Space may become an issue if the Softstart and brakes are seperate ! From What I can tell the cost difference isn't that great either !


Any opinions ??

Thanks
Matt

A-b Slc150 W/pcis Software

I am not at all familiar with the MS-DOS based software PCIS used to program a SLC150 from A-B. Is there any way to add a Rung at the top of the ladder program ???

I can easily add a rung at the bottom, However I cannot seem to find a way to "insert" a rung ??

Any Ideas ???




I wish to add the command line for the EEPROM to an existing SLC, that was programmed several years ago.

Input Frequency Vs. Output Frequency ?

Sending a machine down under, Where the Input voltage signal will be 415 VAC @ 50Hz. vs. 460 VAC @ 60Hz Here.
My question is how will the reduced input frequency effect the output frequency. I am using Yaskawa V-7 VFD's in this app.

One VFD is controlling feed speed with a 0-10VDC signal, the others are simply running open loop, And accurate speed control is not needed.
So the one I am concerned with is the feed speed, As I calibrate the speed entry into the HMI, I don't know if it will be accurate once it is installed in the 50Hz enviroment ????