User guide

P/N: 021-00154, Rev. A.6 - updated for V4.7 Tools Page | 165
DVC7
Appendix I Frequently Asked Questions
Description: DVC controller goes into programming mode when powered on.
Models Affected: DVC5, DVC7 and DVC10
Background:
The DVC controller is in programming mode when its MS and NS LEDs blink green in an alternating pattern.
When the controller is in normal execution mode the MS and NS LEDs will be solid green, red or not
illuminated.
The DVC controller normally goes into programming mode when the Program Loader Monitor running on your
PC is active, the serial RS232 cable is connected between the PC and the DVC controller, you are attempting
to load an application and the DVC is powered cycled. The DVC, when it is powered cycled looks at the
RS232 lines (RTS specifically) to decide if it should go into programming or normal execution mode. On some
PCs depending on the installed RS232 driver and the last program to access the serial port the RTS line can
be left in a state where the DVC believes it should go into Programming mode even though the Program
Loader Monitor is not running.
Solution:
To insure that this does not happen, disconnect the serial cable from the PC or the DVC controller and power
cycle the DVC. Reconnect the cables, and operate as normal.
Module Status (MS) (R/G)
Off – There is no power applied to the Module.
On green – The module is operating in a normal condition.
Flashing green – Device is in standby state, May need commissioning.
Flashing red – Recoverable Fault.
On red – Module has an unrecoverable fault.
Flashing Red/Green – Device is in self-test.
Network Status (NS) (R/G)
Off – There is no J1939 device (or other DVC5) in the project.
Flashing green – J1939 device in project but communication has not been established.
On green – J1939 communication has been established.
Flashing red – The J1939 communication is in a timed-out state.
On red – The device has detected an error that has rendered it incapable of
communicating on the network.
Module & Network Status (MS/NS)
Alternating Flashing Green – Device is being programmed
(BIOS or Application Code).