KillAllMotors command for PowerPMAC

[LeandroMartinsdS]

For the PowerPMAC controllers, the function KillAllMotors in motor.py should be

    def killAllMotors(self):
        # print "killing all motors!"
        command = "#*k"
        (returnString, status) = self.pmac.sendCommand(command)
        self.addToTxtShell(command)

Alternatively, also could be used
command = "#*dkill"
being the command issued when the shortcut CTRL-ALT-K it's used in the PowerPMAC IDE.