Hi guys, I am planning to upgrade to a 24v system, and maybe keep the 12v as a selectable option too, has anyone come across anything like this before, if so are there any major problems, does the 24v system kick straight in via relay or does any one control it via PWM, I am planning to use a Siemens plc and start with the program soon, any starting ideas for the time base would be helpful, and Hz at slow speeds ?