diff --git a/pymelsec/type3e.py b/pymelsec/type3e.py
index 515c033..bb9c1b2 100644
--- a/pymelsec/type3e.py
+++ b/pymelsec/type3e.py
@@ -267,27 +267,33 @@ def set_access_opt(self,
             self._set_comm_type(comm_type)
         if network:
             try:
-                self.network = struct.pack('B', network)
+                struct.pack('B', network)  # Test
+                self.network = network     # Store
             except:
                 raise ValueError("network must be 0 <= network <= 255")
         if pc:
             try:
-                self.pc = struct.pack('B', pc)
+                struct.pack('B', pc) # Test
+                self.pc = pc         # Store
             except:
                 raise ValueError("pc must be 0 <= pc <= 255") 
         if dest_moduleio:
             try:
-                self.dest_moduleio = struct.pack('<H', dest_moduleio)
+                struct.pack('<H', dest_moduleio)   # Test
+                self.dest_moduleio = dest_moduleio # Store
             except:
                 raise ValueError("dest_moduleio must be 0 <= dest_moduleio <= 65535") 
         if dest_modulesta:
             try:
-                self.dest_modulesta = struct.pack('B', dest_modulesta)
+                struct.pack('B', dest_modulesta)     # Test
+                self.dest_modulesta = dest_modulesta # Store
             except:
                 raise ValueError("dest_modulesta must be 0 <= dest_modulesta <= 255") 
         if timer_sec:
             try:
-                self.timer = struct.pack('<H', timer_sec * 4)
+                struct.pack('<H', timer_sec * 4) # Test
+                self.timer = timer_sec * 4       # Store
+
                 self.sock_timeout = timer_sec + 1
                 if self._is_connected:
                     self._sock.settimeout(self.sock_timeout)