3 Error Tables
3-136
NJ-series Troubleshooting Manual (W503)
54AA0000 hex Protocol
Macro Error
An error occurred in
the protocol macro.
• Sequence No. Error: An unreg-
istered number was specified
for SeqNo (communications
sequence number) of the
ExecPMCR instruction (no indi-
cators light).
• Data read/write area exceeded
error: The specified area range
was exceeded when data was
written to or read from the CPU
Unit. (The ERC indicator and
ERR/ALM indicator will flash.)
• Protocol data syntax error:
There was a code that cannot
be executed during protocol
execution. (The ERC indicator
and ERR/ALM indicator will
flash.)
• The total of the areas speci-
fied for link words O1, O2, I1,
and I2 exceeded 500 words.
• The same link word is used
by both ports 1 and 2.
• Writing was specified with a
constant.
• Interrupt notification was
specified for a Serial Commu-
nications Unit.
• Thirty one or more items
were set for the write attribute
data for one message.
• A length of 0 bytes was speci-
fied for a message that was
sent or received.
• The length of a message to
be sent or received exceeds
the maximum send/receive
bytes.
• A message is not registered
for matrix reception.
• The transmission control is
set to both RTS/CTS flow
control and Xon/Xoff flow
control.
S CJ-series
Serial Com-
munications
Units Opera-
tion Manual for
NJ-series
CPU Unit (Cat.
No. W494)
64A00000 hex Tfs (Send
Finished
Monitoring
Time)
Exceeded
The time required
to complete a send
operation exceeded
the Send Finished
Monitoring Time.
• Noise
• The monitor time is shorter than
the actual completion time.
S Same as
above.
64A10000 hex Tfr (Receive
Finished
Monitoring
Time)
Exceeded
The time required
to complete a
reception operation
exceeded the
Receive Finished
Monitoring Time.
• Noise
• The monitoring time is shorter
than the actual completion time.
S Same as
above.
64A20000 hex Tr (Receive
Wait Monitor-
ing Time)
Exceeded
The receive waiting
time exceeded the
Receive Wait Moni-
toring Time.
• Noise
• T
he monitoring time is shorter
than the actual
completion time.
S Same as
above.
Event code Event name Meaning Assumed cause
Level
Reference
Maj Prt Min Obs Info
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