Micromod MOD: 30ML and Modcell Maintenance for 2001N, 2002N, and 1800R User Manual
Page 93
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
ICN
4
MODULE MISMATCH
The slots configured for an ICN
communications module are either empty or the
installed module does not match the slot
configuration.
ICN
5
ACCESS TIMEOUT
Access to transmit has not been granted for at
least one second. Token ring is broken, ICN
restarted.
ICN
6
RESTART FAILURE
Communications cannot be established.
ICN
7
INVALID MESSAGE
The message code of a received message was
invalid or is not supported by the software.
ICN
8
MESSAGE DATA INVALID
A received message could not be processed
because it failed the CRC check.
ICN
9
FRAMING ERROR
No stop bit was detected by the 68032 for a
received byte.
ICN
10
NOISE ERROR
The 68302 checked a bit three times and the
three samples were not identical.
ICN
11
OVERRUN ERROR
The central processor could not store a
received byte before the next byte was
received.
ICN
12
INVALID MESSAGE SIZE
The size of the message or its data field is
invalid.
ICN
13
EXCESS MESSAGES RECEIVED
The receive buffer for this port had no room for
the message being received. A message is
"lost".
ICN
14
EXCESS MESSAGES TO TRANSMIT
The buffer used for the messages to be
transmitted had no room for another. A
message is "lost".
ICN
15
UNEXPECTED COMM MESSAGE
RECEIVED
An input communications message was
received, but the occurrence for which it was
destined is not in the current configuration.
ICN
16
COMMUNICATION OVERLOAD
The time for each instrument on the ICN to
transmit all messages exceeded the
recommended time of 250 msec.
ICN
17
EXCESS MESSAGES FOR TASK
The maximum number of requests queued for a
group has been reached. A message is "lost".
7 -6