Switch off spin flipper if voltage exceeds 34V in voltage control mode

r2939 | ffr | 2010-05-26 13:32:42 +1000 (Wed, 26 May 2010) | 2 lines

site_ansto/instrument/sans/config/beamline/sct_flipper.tcl

@@ -40,6 +40,8 @@ namespace eval ::scobj::rfgen {
   variable RAMPSTART       2
   variable RAMPBUSY        3
   variable RAMPTOZERO      4
+  variable FLIPOFF         5
+  variable MAXVOLTAGE     34
 }
 
 ##
@@ -139,8 +141,8 @@ proc ::scobj::rfgen::rdStatFunc {} {
   variable RAMPSTART
   variable RAMPTOZERO
   variable RAMPIDLE
-
-  set MAXVOLTAGE 34
+  variable FLIPOFF
+  variable MAXVOLTAGE
 
   set basePath [sct]
 
@@ -155,17 +157,6 @@ proc ::scobj::rfgen::rdStatFunc {} {
   set statList [split $statStr "|="]
   mkStatArr stateArr $statList
 
-  if {$stateArr(CV)} {
-    broadcast "WARNING: spin flipper has switched to voltage control"
-    if {$stateArr(voltage) >= $MAXVOLTAGE} {
-      set errMsg "ERROR: Spin flipper switched off voltage exceeds $MAXVOLTAGE in voltage control state, check vacuum"
-      sct geterror $errMsg
-      broadcast $errMsg
-      sct ramping $RAMPSTOP
-      return stateChange
-    }
-  }
-
   if {$statList != [sct oldStateRep]} { 
     hset $basePath/flip_current [expr {$stateArr(curr) / 10.0}]
     hset $basePath/flip_frequency $stateArr(freq) 
@@ -176,6 +167,13 @@ proc ::scobj::rfgen::rdStatFunc {} {
     sct utime readtime
     sct oldStateRep $statList
   }
+  if {$currSuperState != $FLIPOFF && $stateArr(curr) > [sct currTol] && $stateArr(O) && $stateArr(CV)} {
+    broadcast "WARNING: spin flipper has switched to voltage control, voltage = $stateArr(voltage)"
+    if {$stateArr(voltage) >= $MAXVOLTAGE} {
+      sct ramping $FLIPOFF
+    }
+  }
+
   return stateChange
 }
 
@@ -187,6 +185,8 @@ proc ::scobj::rfgen::stateFunc {} {
   variable RAMPSTART
   variable RAMPBUSY 
   variable RAMPTOZERO
+  variable FLIPOFF
+  variable MAXVOLTAGE
 
   set basePath [sct]
 
@@ -233,6 +233,17 @@ proc ::scobj::rfgen::stateFunc {} {
       }
       return ramp
     }
+    $FLIPOFF {
+      sct targetCurr 0
+      sct OutputState 0
+      if { $stateArr(curr) <= [sct currTol] } {
+        sct ramping $RAMPSTOP
+        broadcast "ERROR: Spin flipper switched off voltage exceeds $MAXVOLTAGE in voltage control state, check vacuum"
+        return idle
+      } else {
+        return ramp
+      }
+    }
     $RAMPSTOP {
 #     broadcast RAMPSTOP
       if [string match $currControlStatus "BUSY"] {