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The command ascan executes a motor scan using absolute positions.
The command for performing the scan looks like:
p17/door/exp.01 [31]: ascan exp_dmy01 0 1 2 0.1 Operation will be saved in None (fio) Scan #384 started at Tue Sep 11 13:13:24 2012. It will take at least 0:00:00.300000 Moving to start positions... #Pt No dt exp_dmy01 exp_t01 exp_c01 0 0.0107629 0 0.1 29 1 0.130456 0.5 0.1 14 2 0.250917 1 0.1 5 Operation saved in /home/p17user/temp/FirstTest_00384.fio (fio) Scan #384 ended at Tue Sep 11 13:13:25 2012, taking 0:00:00.375624. Dead time 20.1% (motion dead time 6.1%)
exp_dmy is the motor to be scanned, 0 and 1 are the limits, 2 is the no. of intervals and 0.1 is the sample time.
If ScanFile has the extension .dat, data are saved using the spec format:
p17/door/exp.01 [32]: senv ScanFile FirstTest.dat ScanFile = FirstTest.dat p17/door/exp.01 [33]: ascan exp_dmy01 0 1 2 0.1 Operation will be saved in /home/p17user/temp/FirstTest.dat (Spec) Scan #385 started at Tue Sep 11 13:15:21 2012. It will take at least 0:00:00.300000 Moving to start positions... #Pt No dt exp_dmy01 exp_t01 exp_c01 0 0.0105131 0 0.1 1 1 0.143438 0.5 0.1 0 2 0.266759 1 0.1 0 Operation saved in /home/p17user/temp/FirstTest.dat (Spec) Scan #385 ended at Tue Sep 11 13:15:21 2012, taking 0:00:00.380875. Dead time 21.2% (motion dead time 6.2%)
The file FirstTest.dat contains:
#S 385 ascan exp_dmy01 0.0 1.0 2 0.1 #U p17user #D 1347362121.0 #C Acquisition started at Tue Sep 11 13:15:21 2012 #N 5 #L Pt_No dt exp_dmy01 exp_t01 exp_c01 0 0.0105130672455 0.0 0.1 1.0 1 0.143438100815 0.5 0.1 0.0 2 0.266759157181 1.0 0.1 0.0 #C Acquisition ended at Tue Sep 11 13:15:21 2012