Event Class 7 (07H): "Send error"
Event No. Event To correct or avoid errors
(07)06H With 3964(R) only:
Error at end of connection:
• Partner rejected message frame at end of con‐
nection with NAK or a random string (except for
DLE), or
• Acknowledgment code (DLE) received too early.
Check whether the partner is also showing an error,
possibly because not all transmission data has arrived
(e.g. due to break on line) or due to serious faults or
because the partner device has malfunctioned. Identi‐
fy the malfunction, possibly by using an interface test
device switched into the transmission line.
(07)07H With 3964(R) only:
Acknowledgment delay time exceeded at end of
connection or response monitoring time exceeded
after send message frame:
After connection release with DLE ETX, no response
received from partner within acknowledgment delay
time.
Partner device faulty or too slow. Identify the malfunc‐
tion, possibly by using an interface test device switch‐
ed into the transmission line.
(07)08H For ASCII driver only:
The waiting time for XON or CTS = ON has expired.
The communication partner has a fault, is too slow or
is switched o-line. Check the communication partner
or, if necessary, change the parameters.
(07)09H With 3964(R) only:
Connection setup not possible. Number of permitted
setup attempts exceeded.
Check the interface cable or the transmission parame‐
ters.
Also check that receive function between CPU and CP
is correctly congured at the partner device.
(07)0AH With 3964(R) only:
The data could not be transmitted. The permitted
number of transfer attempts was exceeded.
Check the interface cable or the transmission parame‐
ters.
(07)0BH With 3964(R) only:
Initialization conict cannot be solved because both
partners have high priority.
Change the parameter assignment.
(07)0CH With 3964(R) only:
Initialization conict cannot be solved because both
partners have low priority.
Change the parameter assignment.
Diagnostics with the CP 440
8.3 Diagnostics Messages of the Function Blocks
Point-to-point connection CP 440 Installation and Parameter Assignment
100 Equipment Manual, 03/2022, A5E00057742-AE
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