
MOD 30ML Operation
APPENDIX A - EVENT CODES
A-5
Table A-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".
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