Rockwell Automation 1395 Node Adapter Board - Manual (Page 63)

6 Chapter
6-1
Troubleshooting and Maintenance
Introduction This section describes the Node Adapter board fault diagnostics and how
they are processed by the 1395 Drive.
All Adapter Boards provide initial fault handling based on conditions
within their environment, and then signal the Bulletin 1395 which provides
further disposition based on system requirements. Faults are divided into
three categories:
Hard Faults Hard Faults are non-recoverable. That is, the Bulletin 1395 must either be
RESET or POWER-CYCLED in order to clear the fault condition. An
Adapter Board transmit its fault to the Main Control Board through the
dual-port RAM as explained in the Bulletin 1395 Instruction Manual. A
Hard Fault in an adapter is designed to create an E-Coast Stop. The
following examples are considered Hard Faults:
S Internal RAM
S External RAM
S Microbus RAM
S EPROM Checksum
S Watchdogs – which monitor internal states.
Soft Faults Soft Faults occur when an Adapter Board detects a condition which may
result in undesirable operation. The Adapter takes appropriate action within
its domain to guard against further operation and signals the condition to
the 1395 Drive. In addition, the fault may be cleared and normal operation
resumed at the point the fault occurred. Examples of Soft Faults are:
S Microbus Handshake
S Bridge Overtemperature
S Serial Link Timeout
Warning Faults These faults indicate error conditions which are generally transient in
nature, but could result in unpredictable operation if allowed to persist.
Examples of Warning Faults are:
S Overload Pending
S Excessive Armature Volts
S Serial Overrun