DVP-ES3 Series Programming Manual 5. If there is any error response from the modules, the instruction stores the error code in D 2 . The error code descriptions are shown in the following table. _6 6-416 Error code Description 16#1400 Attempted to read the data from the control register (CR) in the module but no such CR number exists. 16#1401 The value is not valid for the module. 16#1402 The module is not responding, communication timeout.