diff --git a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/src/IsttokSeqExec.stt b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/src/IsttokSeqExec.stt
index 6b1e599..6e5152d 100644
--- a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/src/IsttokSeqExec.stt
+++ b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/src/IsttokSeqExec.stt
@@ -1,9 +1,8 @@
 /**
  *
  * Project       : ISTTOK slow Control Sequencer
- * Docs: https://www-csr.bessy.de/control/SoftDist/sequencer/
+ * Docs: https://epics-modules.github.io/sequencer
  *
- * File          : $Id$
  * Description   : Pulse Sequence State Machine
  *
  * Author(s)     : Bernardo Carvalho (IPFN-IST)
@@ -12,7 +11,8 @@
  *
  * Created 5-Mar-2013
  * Revised 07-May-2021
- * Modified 18-Nov-2019
+ * Revised 22-Apr-2024
+ *
  *
  **/
 //%% #include  "errlog.h"
@@ -1345,7 +1345,7 @@ ss ShotSequence {
 //          PS Trigger Pulse
             Isttok_TorPSTrigger = ON;
             pvPut(Isttok_TorPSTrigger);
-            IsttokMARTe2Command = START;
+            IsttokMARTe2Command = START; // ~1.2 s before Btor. ~ 4 sec before TSHOT
             pvPut(IsttokMARTe2Command);
             WSHOTINGSTATE = WSHTST_SShot;
             pvPut(WSHOTINGSTATE);