Toshiba DeviceNet nv Series Instruction Manual page 122

Chapter 6 Troubleshooting
13) Completion of module initialization (02C6H: 1 word)
This register indicates the completion of initializing after switching power on or by a reset request.
"1"
Other than "1" : Initialization under way
14) Down Information (02CDH: 1 word)
This register stores data of the cause of the DN611B getting into down mode.
Down Code (hexadecimal)
F2H
F5H
F7H
F9H
106
6F8C1686
: Initializing completed
Table 6-12 Down Information
TRAP
Read/Write error pndtw3 for controller communication (at DN611B start)
DN611B network communication rate setting error
DeviceNet board error
Cause of Down Mode