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Diagnostics Functions of the CP 441
8.3 Diagnostics via the error signaling area SYSTAT
Event Class 7 (07H):
"Send error"
Event no.
Event Text
(07)01H
Sending the first repetition:
•
•
(07)02H
To correct or avoid errors
A repetition is not an error, however, it can be an
indication that there are disturbances on the
An error was detected during transmission of the
transmission line or a malfunction of the partner
frame, or
device. If the frame still has not been transmitted
The partner requested a repetition by means of after the maximum number of repetitions, an error
a negative acknowledgment code (NAK).
number describing the first error that occurred is
output.
Error during connection setup:
•
After STX was sent, NAK or another code
(except DLE or STX) was received, or
•
The response came too early, or
•
An initialization conflict occurred
Check for malfunction at partner device, possibly by
using interface test device switched into the
transmission line.
(07)03H
Acknowledgment delay time exceeded:
The partner device is too slow or not ready to
After STX was sent, no response came from partner receive, or there is a break in the transmission line,
for example. Check for malfunction at partner
within acknowledgment delay time.
device, possibly by using interface test device
switched into the transmission line.
(07)04H
Termination by partner:
One or more codes were received from the partner
during sending
(07)05H
Negative acknowledgment during sending
(07)06H
Error at end of connection:
•
•
(07)07H
Check whether the partner also indicates an error;
possibly it has not received all of the transmitted
data (for example, due to an interrupted data link),
or because fatal errors are pending, or the behavior
of the partner device is faulty. If necessary, use an
interface test device switched into the transmission
line to check.
Check whether the partner also indicates an error;
possibly it has not received all of the transmitted
data (for example, due to an interrupted data link),
or because fatal errors are pending, or the behavior
of the partner device is faulty. If necessary, use an
interface test device switched into the transmission
line to check.
Check whether the partner also indicates an error;
possibly it has not received all of the transmitted
Partner rejected frame at end of connection with
data (for example, due to an interrupted data link),
NAK or a random string (except for DLE), or
or because fatal errors are pending, or the behavior
Acknowledgment code (DLE) received too early. of the partner device is faulty. If necessary, use an
interface test device switched into the transmission
line to check.
Acknowledgment delay time exceeded at end of
connection or response monitoring time exceeded
after send frame:
Partner device too slow or faulty. If necessary, use
an interface test device switched into the
transmission line to check.
After connection release with DLE ETX, no
response received from partner within
acknowledgment delay time.
(07)08H
ASCII Driver and printer driver only: The waiting
time for XON or CTS = ON has expired
The communication partner has a fault, is too slow
or is switched off-line. Check the communication
partner or, if necessary, change the parameters.
Point-to-point Link CP 441 Installation and Parameter Assignment
204
Manual, 04/2012, A5E00405449-03