Network Control Module 300 Series Technical Bulletin 72
NCM300/350 Troubleshooting
Refer to Table 25 for general NCM300/350 troubleshooting
information.
Table 25: NCM300/350 Troubleshooting Guide
Error/Condition Problem Solution
NCM300/350 resets
continually when any
16-bit adapter card is
installed in either ISA
slot.
The problem is usually caused by
improper installation of ISA boards
(for example, installing while power
is on). If the device operates
normally when an 8-bit adapter card
is installed, then the cause of the
problem is probably due to the
failure of a component used to
operate the 16-bit feature.
Use a working 8-bit adapter card if you have
one or replace the NCM.
Note: If the problem card is an ARCNET
adapter card, remember that the current
ARCNET adapter card in NU-NET101-0, the
CCSI PCA66-CSB, may be set to 8- or
16-bit operation. If experiencing continuous
resets with the card set to 16-bit operation,
try setting it for 8-bit operation.
NCM300/350 resets.
Conflicts on the I/O Bus indicating a
wrong device address, memory
segment, or IRQ level on the ISA
adapter card.
Check and correct the device address,
memory segment, and IRQ level settings.
Improper installation of RAM due to
wrong switch settings, installation in
wrong sockets, or SIMMs have not
been seated correctly in the sockets.
Check and correct RAM address switch
settings per the Setting the Memory
Switches section in the Network Control
Module 300 Series Technical Bulletin
(LIT-6360251). Check for proper socket
installation. With the battery disconnected,
reseat the SIMM cards.
NCM300/350 with an
AT-2000 Plus
installed resets every
2-3 minutes. Resets
when the N1 is
connected and
operating.
The AT-2000 Plus card may
generate excessive noise.
Replace the AT-2000 Plus with a new
NU-NET301-0.
Switching from
NC Direct to N1
Direct configurations
or trying to download
the NCM via the N1
archive device
causes resets.
Failed to clear the memory prior to
download.
Battery must be disconnected for a
reconfiguration. Reconnect the battery last
during the servicing or commissioning
process.
Metasys system time
or day is incorrect.
Line input power to NCM is noisy. Line input power must be noise free. This is
accomplished with a line filter or
Uninterruptible Power Supply (UPS).
Note: Use only sine wave output
uninterruptible power supplies and battery
backup units. Be sure they are correctly
sized.
The NCM logs an
error #449 arg #12 in
the NC Task Errorlog.
Faulty power supply Replace power supply.
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