Yaskawa MP3200 Troubleshooting Manual - Manual (Page 112)

5.2 Troubleshooting Message Communications
Communications Stopped during Message Communications
5-37
T
roubleshooting Programming and Debugging
Error in Message Function
The following table shows the possible causes for message communications to stop during normal com-
munications when an error is indicated in the error status of the Module’s detailed definition or in the pro-
cessing result of the message function. These are in addition to the causes listed in when no error occurs.
Communications
Function Module
Condition Cause Correction
218IFD
Communications
are performed
simultaneously
with multiple
remote stations. The connection parameters
or message functions were
not prepared for the num-
ber of remote stations to
communicate with.
Prepare the connection parameters and
message functions for the number of
remote stations to communicate with.
(Communications with only one station
(one connection) at one time is possible
with one set of connection parameters and
one message function.)
Multiple message
functions are being
executed simulta-
neously.
More than one message
function was executed
simultaneously for the
same Cir- No (circuit num-
ber) and Ch-No (commu-
nications buffer channel
number) or PARAM02
(connection number).
Correct the ladder program so that no
more than one message function is exe-
cuted simultaneously.
If the communications stop due to this
cause, the error can be checked in the pro-
cessing result of the message function.
Refer to the following section for details
on the processing results of message func-
tions.
 Checking the Processing Results and
Status (page 5-20)
There is a connec-
tion for which
automatic recep-
tion is enabled.
A message function and
automatic reception were
executed at the same time
for the same connection or
communications buffer
channel. Execute only automatic reception or only
the message function according to the
application.
Automatic reception can be enabled for
connection numbers 1 to 10. It is disabled
by default.