The GV6, GV6K, GT6, and GT6K drive-controllers all have an onboard analog input. If a customer is using the on-board analog input on any of the above drive-controllers, this analog input is only active if the AC power is applied. If the drive goes into keep-alive mode, using the 24Vdc input, the analog input will rail, and it will read + or -10V. The circuitry that powers the Analog input is powered by the AC line and cannot be altered. Therefore, if you are using the analog input in a program, it will not be valid if the drive's AC power is not present.