IDEC FC4A-C16R2 User Manual

29: TROUBLESHOOTING
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Troubleshooting Diagram 12
Did you make
sure of source 1 operand of the
RXD instruction?
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 termi-
nal using WindLDR (see page 17-5.)
Is the data register
designated as receive status
used repeatedly?
Correct the program to replace the
duplicate data register with a differ-
ent 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
YES
NO
YES
NO
Use one input to start one RXD
instruction without a start delim-
iter.
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 inter-
vals of the incoming data.
Make sure that the receive data
designated as the source 1 oper-
and is correct.
YES
NO
NO
NO
NO
NO

IDEC FC4A-C16R2 Specifications

General

Brand	IDEC
Model	FC4A-C16R2
Category	Controller
Language	English