Diagnostics with the CP 341
8.1 Diagnostics Functions of the CP 341
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01 195
Event class 8 (08H):
"Receive error"
Event no. Event Remedy
(08)02H 3964(R) only:
Error establishing connection:
• In idle mode, one or more random characters
(other than NAK or STX) were received, or
• After an STX was received, the partner sent
more characters without waiting for the
response DLE.
After partner power ON:
• While partner is being switched on, the
CP receives an undefined character.
Check for malfunction of the partner device, possibly
by using interface test device interconnected in the
data link.
(08)05H 3964(R) only:
Logical error while receiving:
After DLE was received, a further random
character (other than DLE or ETX) was received.
Check whether the partner always duplicates the
DLE in the message frame header and data string or
the connection is released with DLE ETX. Check for
malfunction at partner device, possibly by using
interface test device switched into the transmission
line.
(08)06H Character delay time (ZVZ) exceeded:
• Two successive characters were not received
within the character delay time, or
3964(R) only:
• 1. character after sending of DLE while setting
up connection was not received within the
character delay time.
Partner device too slow or faulty. Prove this using an
interface test device interconnected in the data link.
(08)08H 3964(R) only:
Error in block check character (BCC):
The value of the BCC calculated internally does
not match the BCC received by the partner when
the connection was terminated.
Check whether the connection is seriously disrupted;
in this case you may also occasionally see error
codes. Check for malfunction of the partner device,
possibly by using interface test device
interconnected in the data link.
(08)0AH There is no free receive buffer available:
No receive buffer space available for receiving
data.
The FB P_RCV_RK must be called more frequently.
(08)0CH Transmission error:
• A transmission error (parity error, stop bit error,
overflow error) was detected.
3964(R) only:
• If a corrupted character is received in idle
mode, the error is reported immediately so that
disturbances on the transmission line can be
detected early.
RK 512 and 3964(R) only:
• If this happens during send or receive
operations, repetition is started.
Disturbances on the data link cause message frame
repetitions, thus lowering user data throughput. The
risk of an undetected error increases. Change your
system setup or cable wiring.
Check the connecting cable of the communication
partners or check whether both devices have the
same setting for baud rate, parity and number of
stop bits.
(08)0DH BREAK:
Break in receive line to partner.
Reconnect or switch on partner.
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