For an analog output point, a gradual change to a desired value. Some devices attached to analog outputs should not be abruptly stepped up or down, because a sudden change might damage the equipment or cause other problems. Instead, the device can be gradually ramped up or down to the desired value. The SNAP-PAC-EB1 brain offers ramping as a feature, as does the SNAP-PAC-R1 on-the-rack controller.