Behaves as SCL's 'Set Scanner Contrast Level' command which is used for setting the scanner contrast level. Range is 0..100. Additional information: There are 11 different tonemap that will be used on scan images to change the contrast. Software can set the contrast setting to -125, -100, -75, -50, -25, 0, 50, 75, 100, and 125 to select the different tonemaps. A user can also set the value to -127, which is a special mode used by manufacturing to tell the device to use all linear tonemaps and to perform no gamma correction. The scan pml object does not snap the pml scan-contrast. However, the contrast setting is mapped to the correct tonemap within the device.