IDEC MICROSmart FC6A Series User Manual page 630

13: T
ROUBLESHOOTING
Troubleshooting Diagram 13
Correct the program to make sure
that inputs to more than 5 RXD
instructions do not go on
simultaneously.
*1 See Chapter 5 "User Communication via Serial Communication" - "Programming WindLDR" in the "FC6A Series MICROSmart Communication
Manual".
If the user communication still has a problem after completing the above procedure, also perform the
procedure of Diagram 12 described on the preceding page.
13-22
Data is not received correctly
in the user communication mode.
Are communication
parameters set correctly using
WindLDR?
YES
Is the data register
designated as receive status used
repeatedly?
NO
Is a start delimiter
specified in the RXD
instruction?
YES
Are inputs to
YES
more than 5 RXD instructions on
simultaneously?
NO
Did you check
the start delimiter of incoming data?
YES
Did you check
the format of incoming
data?
YES
Is an end delimiter
NO
specified in the RXD
instruction?
YES
Did you check
the end delimiter of
incoming data?
YES
Is the receive
timeout value set correctly
using WindLDR?
YES
Call IDEC for assistance.
FC6A S MICROS
ERIES MART
Set the communication parameters to
match those of the remote terminal using
NO
WindLDR. FC6A Series MICROSmart can
use constants only for start and stop
delimiters.
Correct the program to replace the
YES
duplicate data register with a different
data register.
NO
Use one input to start one RXD
instruction without a start delimiter.
Make sure that the start delimiter in the
NO
RXD instruction matches that of the
incoming data.
Make sure that the receive format of the
NO
RXD instruction matches that of the
incoming data.
Make sure that the end delimiter in the
NO
RXD instruction matches that of the
incoming data.
Make sure that the receive timeout value
NO
is larger than character intervals of the
incoming data.
U ' M FC9Y-B1722
SER S ANUAL
*1
Is one input
used to start multiple RXD
instructions?
YES
NO