diff --git a/site_ansto/instrument/util/gen_sct.py b/site_ansto/instrument/util/gen_sct.py
index 6c3e1b67..8769de9d 100755
--- a/site_ansto/instrument/util/gen_sct.py
+++ b/site_ansto/instrument/util/gen_sct.py
@@ -117,6 +117,7 @@ reserved = {
     'VAR' : 'VAR',
     'PROPERTY' : 'PROPERTY',
     'CONTROL' : 'CONTROL',
+    'CONDITIONAL' : 'CONDITIONAL',
     'DATA' : 'DATA',
     'NXSAVE' : 'NXSAVE',
     'MUTABLE' : 'MUTABLE',
@@ -456,6 +457,7 @@ def p_var_typ_ass(p):
                  | DATA EQUALS true_false
                  | NXSAVE EQUALS true_false
                  | MUTABLE EQUALS true_false
+                 | CONDITIONAL EQUALS text_string
     '''
     p[0] = { p[1] : p[3] }
 
@@ -1445,6 +1447,19 @@ def put_var(MyDriver, MyGroup, MyVar):
         txt += ['      %s::sics_log 9 "simulation_flag=${simulation_flag} => No poll/write for %s"' % (MyDriver['namespace'], MyDriver['name'])]
         txt += ['    }']
 
+    if 'conditional' in MyVar:
+        for idx, line in enumerate(txt):
+            if len(line) > 0:
+                txt[idx] = '  ' + line
+        txt.insert(0, '    if {%s} {' % MyVar['conditional'])
+        txt.append('    }')
+        if len(postfix) > 0:
+            for idx, line in enumerate(postfix):
+                if len(line) > 0:
+                    postfix[idx] = '  ' + line
+            postfix.insert(0, '    if {%s} {' % MyVar['conditional'])
+            postfix.append('    }')
+
     return (txt, postfix)
 
 def put_group(MyDriver, MyGroup):
@@ -1478,6 +1493,13 @@ def put_group(MyDriver, MyGroup):
 
     txt += dfr
 
+    if 'conditional' in MyGroup:
+        for idx, line in enumerate(txt):
+            if len(line) > 0:
+                txt[idx] = '  ' + line
+        txt.insert(0, '    if {%s} {' % MyGroup['conditional'])
+        txt.append('    }')
+
     return txt
 
 def put_mkDriver(MyDriver):