diff --git a/site_ansto/instrument/reflectometer/DMC2280/controller1.txt b/site_ansto/instrument/reflectometer/DMC2280/controller1.txt
index 5aa9f001..09c5edb4 100644
--- a/site_ansto/instrument/reflectometer/DMC2280/controller1.txt
+++ b/site_ansto/instrument/reflectometer/DMC2280/controller1.txt
@@ -1,14 +1,14 @@
 NO TE: PLATYPUS - CONTROLLER 1
 NO TE:
-NO TE: $Revision: 1.7 $
-NO TE: $Date: 2007-03-05 06:03:11 $
+NO TE: $Revision: 1.8 $
+NO TE: $Date: 2007-05-16 07:04:01 $
 NO TE: Author: Dan Bartlett
 NO TE: Last revision by: $Author: dbx $
 NO TE:
 NO TE: A-BEAM SHADE RAISE
 NO TE: B-COLLIMATOR TRANSLATE A=7350364, B=6529772, C=6941582
-NO TE: C-COLLIMATOR TILT LEVEL=134660
-NO TE: D-BEAM ATTENUATOR
+NO TE: C-COLLIMATOR TILT, LEVEL=134660
+NO TE: D-BEAM ATTENUATOR, BEAM CENTRE=8375078
 NO TE: E-SLIT TOWER S3 RAISE
 NO TE: F-SLIT TOWER S4 RAISE
 NO TE: G-SPARE
@@ -27,14 +27,14 @@ DC 25000,25000,25000,25000,25000,25000,,;' SET DECELERATION
 SP 50000,25000,25000,25000,75000,75000,,;' SET SPEED
 SIA=1,25,13,0<-2>2;'HEIDENHAIN ROQ425
 SIB=1,25,13,0<-2>2;'HEIDENHAIN ROQ425
-SIC=1,24,18,6<-2>2;'IVO GDA2S
+SIC=1,24,18,6<-2>2;'IVO
 SID=1,25,13,0<-2>2;'HEIDENHAIN ROQ425
 SIE=1,25,13,0<-2>2;'HEIDENHAIN ROQ425
 SIF=1,25,13,0<-2>2;'HEIDENHAIN ROQ425
 SIG=0,25,13,0<-2>2;'SPARE
 SIH=0,25,13,0<-2>2;'SPARE
-POS=0;' INITIAL BEAM ATTENUATOR POSITION IS PARKED IN THE BEAM
-XQ #ATTEN,1;' EXECUTE PROCEDURE TO CONTROL BEAM ATTENUATOR
+POS=0;' INITIAL BEAM ATTENUATOR FREQUENCY IS 0, PARKED IN THE BEAM
+XQ #ATTEN,1
 JS #THREAD0
 EN
 NO ----------------------------------------
@@ -141,10 +141,15 @@ NO DCH=OLDDCH
 RE
 NO ----------------------------------------
 #ATTEN
-DEADBD=20;' SET ENCODER DEADBAND
-PARKPOS=8309158; 'PARKING ENCODER POSITION
-SHUTPOS=8390307; 'BEAM SHUT ENCODER POSITION
-STRTPOS=8390307; 'OSCILLATING START ENCODER POSITION
+NO TE: THIS IS A PROGRAM FOR CONTROLING THE BEAM ATTENUATOR
+NO TE: ITS STATE IS SET BY THE VARIABLE POS
+NO TE: IF POS=-1 THEN ITS OUT OF THE BEAM
+NO TE: IF POS=0 THEN ITS IN THE BEAM, LIKE A SHUTTER
+NO TE: IF POS=1 THEN ITS OSCILLATING
+DEADBD=20
+PARKPOS=8308518; 'PARKING ENCODER POSITION
+SHUTPOS=8359718; 'BEAM SHUT ENCODER POSITION
+STRTPOS=8395558; 'OSCILLATING START ENCODER POSITION
 IF (POS=-1)&(@ABS[_TPD - PARKPOS]>DEADBD)
 NO TE: PARK ATTENUATOR OUT OF BEAM - NO ATTENUATION
 SPD=75000
@@ -180,13 +185,13 @@ SPD=180000
 ACD=_SPD*4;' 0.25S TO ACCELERATE
 DCD=_ACD
 #LOOP
-PRD=140625;' 90MM = 60MM IN THE BEAM, 15MM FOR ACCEL AND 15MM FOR DECEL
+PRD=125000;' 80MM = 60MM IN THE BEAM, 10MM FOR ACCEL AND 10MM FOR DECEL
 BGD
 AMD
-PRD=-140625
+PRD=-125000
 BGD
 AMD
 ENDIF
 JP #LOOP,(POS=1)
 JP #ATTEN
-EN
\ No newline at end of file
+EN