6. TROUBLESHOOTING
IM9000F02-E2
51
Ladder communication
Details
Cause
Measures
Trouble wit and imperfect contact
communication cable and connector
Check communication cables and
connectors.
Device address designation differs
Make reassignment after checking
the
device address by referring to
"
3.4 Device address setting
"
(P.9).
Incorrect communication speed
Set the communication speed suitable
for the PLC by referring to
"
3.5 Communication speed
setting
" (P.11).
No response
Incorrect data configuration setting
Make reassignment after checking
the
data configuration by referring to
"
3.6 Data configuration setting"
(P.13).
Transmission line is not set to the
receive state after data send
Check the program on the PLC side.
The specified identifier is not defined.
Check the identifier.
The number of read data exceeds the
specified number.
Check the number of data.
No command length is correct
*Command length must be 10 bytes including
CR and LF.
Check the PLC side program.
No settings are written
Write data is out of the range
Check a setting range.
An unsettable identifier (measured
value,
etc.) was specified.
Check whether they are identifiers
corresponding to settable items.
All return characters
other than STX, device
address, identifier, CR
and LF are set to F.
Characters other than BCD codes (0 to
9) were used for communication data
(excluding STX, CR and LF)
Make conversion to BCD coded
characters.
