IDEC MICROSmart FC6A Series, User Manual

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13: T
ROUBLESHOOTING
13-20 FC6A S
ERIES
MICROS
MART
U
SER
’
S
M
ANUAL
FC9Y-B1722
Troubleshooting Diagram 13
*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.
Call IDEC for assistance.
NO Are communication
parameters set correctly using
WindLDR?
Are inputs to
more than 5 RXD instructions on
simultaneously?
Data is not received correctly
in the user communication mode.
Set the communication parameters to
match those of the remote terminal using
WindLDR. FC6A Series MICROSmart can
use constants only for start and stop
delimiters.
*1
Is the data register
designated as receive status used
repeatedly?
Correct the program to replace the
duplicate data register with a different
data register.
YES
NO
Is a start delimiter
specified in the RXD
instruction?
YES
Did you check
the start delimiter of incoming data?
Did you check
the format of incoming
data?
Is an end delimiter
specified in the RXD
instruction?
Did you check
the end delimiter of
incoming data?
Is the receive
timeout value set correctly
using WindLDR?
Is one input
used to start multiple RXD
instructions?
Make sure that the receive format of the
RXD instruction matches that of the
incoming data.
Correct the program to make sure
that inputs to more than 5 RXD
instructions do not go on
simultaneously.
NO
YES
NO
YES
YES
YES
YES
YES
NO
YES
NO
Use one input to start one RXD
instruction without a start delimiter.
Make sure that the start delimiter in the
RXD instruction matches that of the
incoming data.
Make sure that the end delimiter in the
RXD instruction matches that of the
incoming data.
Make sure that the receive timeout value
is larger than character intervals of the
incoming data.
YES
NO
NO
NO
NO