DCP Series Telcon Message Manual - Public Support Login - Unisys

Event 1 HARDWARE LINE ERROR (NOT A PP STATE ITEM)
Supplementary Message For Class 15, Event 01
DATA OVERRUN (UNISCOPE)
Description: This status bit is set when the communication line handler (CLC) is
unable to keep up with the required input data rate. R8 contains the value of 0040 or
0041 (bit 6 is set). Telcon generates this CENLOG.
Action: Several actions can be considered for this error. First, determine if the line
module being used is capable of operating at the baud rate of the line. If that appears
to be in order, consider the priority of the port. The guideline is that the lower the
port number within a CLC, the higher the priority that port is given by the CLC. Many
times, you can solve the problem by rearranging the line modules so that UNISCOPE
line modules reside in the higher priority ports. If that doesn’t work, the CLC may be
overloaded and you should consider reducing the number of lines on the CLC. If this
is not acceptable, reduce the line speed so that the CLC can keep up with the input
data rate. For more information, refer to the DCP Series Communications Processor
Architecture Programming Reference Manual (7431 5805).
If logging this error causes undesirable overhead to the system, you can issue an NMS
DOWN command for the line on which the error is occurring. When the source of the
error has been found and corrected, you can issue an NMS UP command to restore
the line to a normal operating state.
MESSAGE TIMER EXPIRATION (UNISCOPE)
Description: This status bit is set if the message timer expires. The message timer is
started when the first character is successfully received from, or sent to, the terminal.
If this timer expires, it indicates that the message did not complete and that the
terminal is malfunctioning. R8 contains the value of 0400 or 0401 (bit 10 is set).
Telcon generates this CENLOG.
Action: If this error occurs often, take the terminal in question offline and check and
repair as necessary. If logging this error should cause intolerable overhead to the
system, issue an NMS DOWN command for the terminal. When the terminal has been
repaired and brought back online, you will have to issue an NMS UP command before
the terminal can return to the network.
7436 0728–303 15–3