diff --git a/site_ansto/instrument/util/gen_sct.py b/site_ansto/instrument/util/gen_sct.py
index 1f0b6450..4b9c9b70 100755
--- a/site_ansto/instrument/util/gen_sct.py
+++ b/site_ansto/instrument/util/gen_sct.py
@@ -1370,8 +1370,10 @@ def put_group(MyDriver, MyGroup):
             nodename = groupname + MyVar['name']
             if MyVar['readable'] > 0:
                 poll_period = MyVar['readable']
-                if poll_period < 1 or poll_period > 300:
-                    poll_period = 5
+                if poll_period < 1:
+                    poll_period = 1
+                if poll_period > 3600:
+                    poll_period = 3600
                 txt += ['      ${sct_controller} poll ${scobj_hpath}/%s %s' % (nodename, poll_period)]
         for var in sorted(MyGroup['Vars']):
             MyVar = MyGroup['Vars'][var]