To prevent the process data values from being clamped, you can set the channel high and low range as "NaN."
When this is performed, the process value is limited by the values supported by the data type.
The DRIVEDSB and Siemens DP/AS-i Link DSB do not support extended range handling.
You must refer to the appropriate user manuals for more information on the extended range of the devices.
7 DEVICE SUPPORT BLOCK (DSB)