diff --git a/site_ansto/instrument/config/environment/keysight_N8740A.sct b/site_ansto/instrument/config/environment/keysight_N8740A.sct
index ace82c77..07d5c3d3 100644
--- a/site_ansto/instrument/config/environment/keysight_N8740A.sct
+++ b/site_ansto/instrument/config/environment/keysight_N8740A.sct
@@ -6,50 +6,74 @@ driver keysight_N8740A = {
   simulation_group = environment_simulation
   group = {
     type = int;
-    var state = {
+    var output_enable = {
       readable = 2; read_command = 'OUTPUT:STATE?';
       writeable = 1; write_command = 'OUTPUT:STATE ';
       allowed = '0,1';
     }
+    type = float;
+    var amps = {
+      readable = 1; read_command = 'MEASURE:SCALAR:CURRENT:DC?';
+      units = 'A';
+    }
+    var volts = {
+      readable = 1; read_command = 'MEASURE:SCALAR:VOLTAGE:DC?';
+      units = 'V';
+    }
+    var setpoint = {
+      readable = 1; read_command = 'SOURCE:VOLTAGE?';
+      writeable = 1; write_command = 'SOURCE:VOLTAGE ';
+      driveable = setpoint;
+      tolerance = 1;
+      lowerlimit = 0; upperlimit = 150;
+      units = 'V';
+    }
   }
   group current = {
     type = float;
-    var sensor = {
-      readable = 1; read_command = 'MEASURE:CURRENT?';
-      writeable = 1; read_command = 'MEASURE:CURRENT ';
+    var prot_enable = {
+      type = int;
+      readable = 1; read_command = 'SOURCE:CURRENT:PROTECTION:STATE?';
+      writeable = 1; write_command = 'SOURCE:CURRENT:PROTECTION:STATE ';
+      allowed = '0,1';
     }
-    var setpoint = {
+    var prot_limit = {
       readable = 1; read_command = 'SOURCE:CURRENT?';
-      writeable = 1; read_command = 'SOURCE:CURRENT ';
-    }
-    var limit = {
-      readable = 1; read_command = 'SOURCE:CURRENT:PROTECTION?';
-      writeable = 1; read_command = 'SOURCE:CURRENT:PROTECTION ';
+      writeable = 1; write_command = 'SOURCE:CURRENT ';
+      lowerlimit = 0; upperlimit = 22;
+      units = 'A';
     }
   }
   group voltage = {
     type = float;
-    var sensor = {
-      readable = 1; read_command = 'MEASURE:VOLTAGE?';
-      writeable = 1; read_command = 'MEASURE:VOLTAGE ';
+    var lolimit = {
+      readable = 1; read_command = 'SOURCE:VOLTAGE:LIMIT:LOW?';
+      writeable = 1; write_command = 'SOURCE:VOLTAGE:LIMIT:LOW ';
+      units = 'V';
     }
-    var setpoint = {
-      readable = 1; read_command = 'SOURCE:VOLTAGE?';
-      writeable = 1; read_command = 'SOURCE:VOLTAGE ';
-    }
-    var limit = {
+    var hilimit = {
       readable = 1; read_command = 'SOURCE:VOLTAGE:PROTECTION?';
-      writeable = 1; read_command = 'SOURCE:VOLTAGE:PROTECTION ';
+      writeable = 1; write_command = 'SOURCE:VOLTAGE:PROTECTION ';
+      lowerlimit = 0; upperlimit = 165;
+      units = 'V';
     }
   }
   group system = {
     type = text;
     data = false; control = false; mutable = false; nxsave = false;
+    var ident = {
+        readable = 15; read_command = '*IDN?';
+    }
     var error = {
         readable = 1; read_command = 'SYSTEM:ERROR?';
     }
     var version = {
-        readable = 1; read_command = 'SYSTEM:VERSION?';
+        readable = 15; read_command = 'SYSTEM:VERSION?';
     }
   }
+  code setValue = {
+    @TCL
+    set cmd "${cmd_str}${par}@@NOREPLY@@"
+    @END
+  }
 }