My next project used two PP745 48V SEM Powerpaks, and the calibrator I had would only read the various settings, but could not be used to make any changes. It turns out that not all models of calibrator will program all models of Powerpak! I first got hold of a model 662/14022 calibrator that worked just fine with my PP784 80V SEM Powerpak, i.e. It's worth taking a moment to discuss the various SEVCON CAN Calibrators available. I'm pretty sure I paid over the odds for it and I subsequently broke it, but that's another story. Calibrators are available for rent but I wanted one that I could keep hold of for a while, so I searched on eBay for one with the intention of reselling it at a later date. Unfortunately I've not been able to find any information on the data available from the controllers on a real time basis, and together with the fact that the calibrators are expensive I set out to try and build my own. These controllers have the ability to output CAN messages, and are also programmable through the same CAN interface. I have a couple of projects that utilize SEVCON Powerpak controllers. Jan 22,2012 - I've added an Updates page for new stuff. You're welcome to email me with questions, suggestions or cries for help. It is most likely going to be a continual work in progress, but there is a current working program available for download. This page details a program I have written to emulate the SEVCON CAN Calibrator that is used to diagnose and program the SEVCON Powerpak and Micropak DC motor controllers.