Diagnostics with the CP 440
8.3 Diagnostics Messages of the Function Blocks
Point-to-point connection CP 440 Installation and Parameter Assignment
122 Manual, 09/2007, A5E00057742-03
Event Class 8 (08H): "Receive error"
Event no. Event To correct or avoid errors
(08)0CH Transmission error:
• Transmission error (parity error, stop bit error,
overflow error) detected.
With 3964(R) only:
• If faulty character is received in idle mode, the
error is reported immediately so that
disturbances on the transmission line can be
detected early.
With 3964(R) only:
• If this occurs during send or receive operation,
repetitions are initiated.
Faults on the transmission line cause message
frame repetitions, thus lowering user data
throughput. Danger of an undetected error
increases. Change your system setup or the line
routing.
Check the cable of the communications partner or
check whether both devices have same setting for
baud rate, parity and number of stop bits.
(08)0DH BREAK:
Receive line to partner is interrupted.
Reconnect or switch partner on again.
(08)0EH Receive buffer overflow when flow control not
enabled.
The function block to be received must be called
more often in the user program, or communication
with flow control must be configured.
(08)10H Parity error Check the cable of the communications partner or
check whether both devices have same setting for
baud rate, parity and number of stop bits.
(08)11H Character frame error Check the cable of the communications partner or
check whether both devices have same setting for
baud rate, parity and number of stop bits.
Change your system setup or the line routing.
(08)12H For ASCII driver only:
More characters were received after the CP had
sent XOFF or set CTS to OFF.
Reassign the parameters for the communication
partner, or deal with the data in the CP more quickly.
(08)14H For ASCII driver only:
A message frame or several message frames have
got lost, because you have been working without
flow control.
Work with flow control as much as you can. Use the
entire receive buffer. Set the "Reaction to CPU Stop"
parameter in the basic parameters to "Continue".
(08)16H The length of a received message frame was
longer than the maximum specified length.
Correction required at the partner
(08)20H Static error when calling the SFC RD_REC. The
return value RET_VAL of the SFCs is provided in
the SFCERR variable in the instance DB for
evaluation.
Analyze the SFCERR variable from the instance DB.
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