27: TROUBLESHOOTING
OPENNET CONTROLLER USER’S MANUAL 27-17
Troubleshooting Diagram 10
Did you make
sure of source 1 operand of the
TXD instruction?
Call IDEC for assistance.
NO
Are communication
parameters set correctly
using WindLDR?
NO
Are inputs to
more than 5 TXD instructions on
simultaneously?
YES
Correct the program to make sure that
inputs to more than 5 TXD instructions do
not go on simultaneously.
Data is not transmitted correctly
in the user communication mode.
Set the communication parameters to
match those of the remote terminal using
WindLDR (see page 17-3).
Make sure that the busy signal at the
remote terminal does not exceed 5 sec.
NO
NO
Is the data register
designated as transmit status
used repeatedly?
Correct the program to replace the repeated
data register with a different data register.
Is duration of
the busy signal at the remote
terminal less than
5 sec?
YES
NO
YES
Make sure that the transmit data desig-
nated as source 1 operand is correct.
YES
YES
When the user communication still has a problem after completing the above procedure,
also perform the procedure of Diagram 9 described on the preceding page.
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