Basler Pioneer User Manual page 184

I/O Control
When you use the Timer Duration Abs parameter to set the duration time, the camera accomplishes
the setting change by automatically changing the Timer Duration Raw parameter to achieve the
value specified by the Timer Duration Abs setting. This leads to a limitation that you must keep in
mind if you use Timer Duration Abs parameter to set the duration time. That is, you must set the
Timer Duration Abs parameter to a value that is equivalent to a setting you could achieve by using
the Timer Duration Raw and the current Timer Duration Base parameters. For example, if the time
base was currently set to 50 µs, you could use the Timer Duration Abs parameter to set the duration
to 50 µs, 100 µs, 150 µs, etc.
If you read the current value of the Timer Duration Abs parameter, the value will indicate the product
of the Timer Duration Raw parameter and the Timer Duration Time Base. In other words, the Timer
Duration Abs parameter will indicate the current duration time setting.
You should also be aware that if you change the duration time using the raw settings, the Timer
Duration Abs parameter will automatically be updated to reflect the new duration time.
174 Basler pioneer