diff --git a/script/optics/ExitSlitScan.py b/script/optics/ExitSlitScan.py
index cba1dae1..368ca2db 100644
--- a/script/optics/ExitSlitScan.py
+++ b/script/optics/ExitSlitScan.py
@@ -9,8 +9,7 @@ SENSORS = (SampleCurrent, RefCurrent, AuxCurrent, MachineCurrent)
 STARTPOS = (-10.0)
 ENDPOS = (200.0)
 STEPS = 10.0
-LATENCY = 1.0
-DWELL = 1.0
+LATENCY = 10.
 
 lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPS, LATENCY, before_read=before_readout, after_read=after_readout)