Siemens SIMATIC CP 340 User Manual page 139

Event no. Event
(08)0AH There is no free receive buffer available:
No receive buffer space available for receiving
data.
(08)0CH Transmission error:
A transmission error (parity error, stop bit error,

overflow error) was detected.
Only for 3964(R):
If this happens during send or receive

operations, repetition is started.
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.
If the SF LED (red) and the RxD LED (green)

light up, there is a break in the connecting
cable (cable break) between the two
communication partners.
(08)0DH BREAK:
Break in receive line to partner.
(08)10H Only for ASCII drivers:
Parity error:
If the SF LED (red) and the RxD LED (green) light
up, there is a break in the connecting cable (cable
break) between the two communication partners.
(08)11H Only for ASCII drivers:
Character frame error:
If the SF LED (red) and the RxD LED (green) light
up, there is a break in the connecting cable (cable
break) between the two communication partners.
(08)12H Only for ASCII drivers:
More characters were received after the CP had
sent XOFF or set CTS to OFF.
(08)18H Only for ASCII drivers:
DSR = OFF or CTS = OFF
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03
8.2 Diagnostics Messages of the Function Blocks P_SEND, P_RCV and P_PRINT
Event class 8 (08H):
"Receive error"
Diagnostics with the CP 340
To correct or avoid errors
The P_RCV FB must be called more frequently.
Disturbances on the data link cause telegram
repetitions, thus lowering user data throughput. The
risk of undetected error increases. Change your
system setup or cable wiring.
Check the connecting cables of the communication
partners or check whether both devices have the
same setting for baud rate, parity and number of
stop bits.
Reconnect or switch on partner.
Check the connecting cables of the communication
partners or check whether both devices have the
same setting for baud rate, parity and number of
stop bits.
Change your system setup or cable wiring.
Check the connecting cables of the communication
partners or check whether both devices have the
same setting for baud rate, parity and number of
stop bits.
Change your system setup or cable wiring.
Reset the parameters for the communication partner
or read data from CP more quickly.
The partner has switched the DSR or CTS signal to
"OFF" before or during a transmission.
Check the partner's control of the RS 232C
accompanying signals.
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