Micromod MOD: 30ML and Modcell Maintenance for 2001N, 2002N, and 1800R - Manual (Page 96)

MOD30ML and Modcell Maintenance Manual
EVENT CODES AND TRANSITION MESSAGES
Table 7-2. Event Codes, Description and Action (Cont’d)
Block
Type
Codes Full Message Text Description/Action
IF 21 EPROM CHECKSUM FAULT When the instrument was last powered, a
checksum error was found in the identity
module EPROM and the instrument therefore
shut down. See Code 17, INSTRUMENT
SHUTDOWN FAULT.
IF 22 BAD RAM FAULT When the instrument was last powered, one of
the RAM chips failed the read/write test, and
the instrument therefore shut down. The error
address is preserved at shutdown. See Code
17, INSTRUMENT SHUTDOWN FAULT.
IF 23 I/O BOARD 1 COMMUNICATIONS
ERROR An error (no response or bad message
checksum) occurred in trying to communicate
with the carrier board. There are wrap around
counters for these errors at IF1,SLNORSPS
and IF1,SLCHKSMS.
IF 39 BAD CLOCK CHIP The real time clock chip is not working
correctly. Time and date information will not
remain current through a power outage.
IF 40 TIME AND DATE NOT VALID The time of day, calendar date, and day of
week need to be set.
IF 41 I/O IS LOCKED The I/O is locked because Attribute No.195,
Lock I/O Blocks (IOLOCK) is YES. In the
locked state, output function block values are
not copied to the output module block output
value, and input module block values are not
copied to the input function blocks. Field input
values continue to be updated in the input
module blocks and output module block values
can be written by the operator.
IF 42 COMMUNICATION BLOCKS ARE
LOCKED Communications are locked because Attribute
No. 158, Lock ICN Communications Blocks ?
(COMMLOCK) is YES. In the locked state, the
output communication blocks do not fetch data
from their source pointers (they do continue to
send out their current value), and input
communication blocks do not refresh their
outputs from received messages. Input and
output communication block outputs can be
written to by the operator.
IF 43 DMA FAULT An error occurred in a DMA transfer and the
instrument therefore shut itself down. The
diagnostic is readable when the instrument is
powered up again. See Code 17,
INSTRUMENT SHUTDOWN FAULT .
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